A Collection ofTechnical Papers

12th AIAA/CEAS AEROACOUSTICSCONFERENCE

Volume 1

CAMBRIDGE, MASSACHUSETTS8-10 May 2006 TIB/UB Hannover 89

128 305 38X

A Collection of Papers from the12th AIAA/CEAS Aeroacoustics Conference

(27th AIAA Aeroacoustics Conference)Cambridge, Massachusetts

8-10 May 2006

Table of Contents

Paper No.

AIAA-2006-2400

AIAA-2006-2401

AIAA-2006-2402

AIAA-2006-2403

AIAA-2006-2404

AIAA-2006-2405

AIAA-2006-2406

AIAA-2006-2407

AIAA-2006-2408

Title and Author Page Number

A Self-Powered Wireless Active Acoustic LinerS. Kadirvel, F. Liu, S. Horowitz, T. Nishida, K. Ngo, L. Cattafesta,and M. Sheplak 1

Experimental Study of Acoustic Impedance of MEMS-BasedMicro-Perforated LinersV. Chandrasekharan, M. Sheplak, and L. Cattafesta 11

Cascaded Perforates as One-Dimensional, Bulk AbsorbersT. Parrott and M. Jones 26

Assessment of Bulk Absorber Properties for Multi-LayerPerforates in Porous Honeycomb LinersM. Jones and T. Parrott 46

Experimental Investigation of Nonlinear Acoustic Properties forPerforatesH. Boden, Y. Guo, and H. Tozun 67

The Sound Absorbing Potential of Carbon-Graphite FoamR. Gaeta 75

Self-Sustained Oscillations in Shock Wave/Turbulent BoundaryLayer InteractionS. Pirozzoli and F. Grasso 89

Correlation Characteristics of the Pressure-Fluctuations atShock-Boundary Layer InteractionB. Efimtsov, N. Kozlov, and A. Andersson 103

Sound and Vibration Produced by an Airfoil Tip in a TurbulentBoundary Layer Flow with an Elastic End WallP. Slaboch and S. Morris 113

AIAA-2006-2409

AIAA-2006-2410

AIAA-2006-2411

AIAA-2006-2412

AIAA-2006-2413

AIAA-2006-2414

AIAA-2006-2415

AIAA-2006-2416

AIAA-2006-2417

AIAA-2006-2418

AIAA-2006-2419

AIAA-2006-2420

AIAA-2006-2421

Rough Wall Boundary Layer NoiseD. Grissom, B. Smith, W. Devenport, and S. Glegg 121

Characteristic Lifelength of Coherent Structure in the TurbulentBoundary LayerD. Palumbo 137

Sound Level Effect on Perforated Panel Boundary Layer GrowthJ. Gallman, M. Drouin, and R. Olsen 153

Prediction of Boundary Layer Sound Radiation from Wall ShearStresses Using DNS DataZ. Hu, C. Morfey, and N. Sandham 166

Shock-Capturing Dissipation Schemes for High-AccuracyComputational Aeroacoustics (CAA) CodesR. Hixon, D. Bhate, M. Nallasamy, and S. Sawyer 176

Aeroacoustic Computations Using a High Order ShockCapturing SchemeV. Daru and X. Gloerfelt 187

A New High-Resolution Balance-Characteristic Method forAeroacousticsS. Karabasov, V. Goloviznin, T. Kozubskaya, and I. Abalakin 190

Non-Reflecting Boundary Conditions for One-Step LBMSimulation of AeroacousticsE. Kam, R. So, and R. Leung 205

CAA Using 3D CESE Method with a Simplified Courant NumberInsensitive SchemeJ. Yen, E. Duell, and W. Martindale 214

Aeroacoustic Simulations for Complex Geometries Based onHybrid MeshesF. Lorcher, J. Utzmann, M. Dumbser, and C. Munz 231

The Influence of Flow Domain Modeling on the Accuracy ofDirect and Hybrid Aeroacoustic Noise CalculationsW. De Roeck, G. Rubio, M. Baelmans, P. Sas, and W. Desmet 251

The Prediction of Fan Exhaust Noise PropagationY. Zhao and P. Morris 272

Numerical Prediction of Propagation and Radiation of Aft Fanand Core Nozzle NoiseR. Arina 288

AIAA-2006-2423

AIAA-2006-2424

AIAA-2006-2426

AIAA-2006-2427

AIAA-2006-2428

AIAA-2006-2429

AIAA-2006-2430

AIAA-2006-2431

AIAA-2006-2432

AIAA-2006-2433

AIAA-2006-2434

AIAA-2006-2435

AIAA-2006-2436

AIAA-2006-2437

A 3D Parabolic Equation Method for Wind Turbine NoisePropagation in Moving Inhomogeneous AtmosphereR. Cheng, P. Morris, and K. Brentner 296

Leading Edge NoiseS. Glegg, J. Staubs, and W. Devenport 310

A Parametric Study of Nonlinear Gust-Airfoil InteractionV. Golubev, R. Mankbadi, M. Visbal, J. Scott, and R. Hixon 341

Analysis of Control Concepts for Cavity FlowsS. Arunajatesan, C. Kannepalli, and N. Sinha 354

Flow Field Dynamics in Open Cavity FlowsN. Murray and L. Ukeiley 364

An Investigation into Supersonic Swept Cavity FlowsS. Gai, E. Samanes, and J. Milthorpe 380

Coupling of a Jet-Slot Oscillator With the Flow-Supply Duct:Flow-Acoustic Interaction ModelingM. Glesser, A. Billon, V. Valeau, and A. Sakout 390

Two and Three Dimensional Simulations of Supersonic CavityFlowH. Kim, S. Aradag, and D. Knight 399

Compressible POD/Galerkin Reduced-Order Model of Self-Sustained Oscillations in a CavityX. Gloerfelt 417

Aeroacoustic Computations of High-Reynolds Number CavityFlows on Staggered GridsX. Gloerfelt 445

Reducing Propulsion Airframe Aeroacoustic Interactions withUniquely Tailored Chevrons: 2. Installed NozzlesV. Mengle, R. Elkoby, L. Brusniak, and R. Thomas 466

Reducing Propulsion Airframe Aeroacoustic Interactions withUniquely Tailored Chevrons: 3. Jet-Flap InteractionV. Mengle, L. Brusniak, R. Elkoby, and R. Thomas 480

Computational Analysis of a Chevron Nozzle Uniquely Tailoredfor Propulsion Airframe AeroacousticsS. Massey, A. Elmiligui, C. Hunter, R. Thomas, P. Pao,and V. Mengle 495

Novel In-flight Noise Analysis SystemF. Hutto and E. Bultemeier 518

AIAA-2006-2438

AIAA-2006-2439

AIAA-2006-2440

AIAA-2006-2441

AIAA-2006-2442

AIAA-2006-2443

AIAA-2006-2444

AIAA-2006-2445

AIAA-2006-2447

AIAA-2006-2449

AIAA-2006-2450

AIAA-2006-2451

AIAA-2006-2452

Flight Test Results for Uniquely Tailored Propulsion-AirframeAeroacoustic Chevrons: Community NoiseE. Nesbitt, V. Mengle, B. Callender, R. Thomas, and M. Czech 523

Flight Test Results for Uniquely Tailored Propulsion-AirframeAeroacoustic Chevrons: Shockcell NoiseV. Mengle, U. Ganz, E. Nesbitt, E. Bultemeier, and R. Thomas 536

Effect of Uniform Chevrons on Cruise Shockcell NoiseE. Bultemeier, U. Ganz, J. Premo, and E. Nesbitt 553

A Comparative Use of the PSE and LES Approaches for JetNoise PredictionsE. Piot, G. Casalis, and F. Muller 568

An Approach to Improve High Frequency Noise Prediction inLES of JetsX. Wu, G. Page, and J. McGuirk 581

Computation of the Noise Radiated by Jets withLaminar/Turbulent Nozzle-Exit ConditionsS. Barre, C. Bogey, and C. Bailly 594

Phased-Array Imaging of Jet Noise Sources in a Large-EddySimulationL. Brusniak, M. Shur, and P. Spalart 609

Computation of the Flow and Noise of Round and BeveledNozzlesK. Viswanathan, M. Shur, M. Strelets, and P. Spalart 628

Direct Computation of the Sound Generated by Isothermal andNon-Isothermal Mixing LayersC. Moser, E. Lamballais, and Y. Gervais 658

Accurate Prediction of Sonic Boom SignalsA. Pilon 671

Effect of Pressure Distortion and Sampling Rate on ShapedSonic Boom PredictionsK. Laflin 681

Ray Tracing for Long Range Atmospheric Propagation ofInfrasoundO. Gainville, P. Blanc-Benon, P. Piserchia, and J. Scott 694

Sonic Boom Prediction: A New Empirical Formulation andAnimated Graphical ModelA. Clare and R. Oman 695

AIAA-2006-2453

AIAA-2006-2455

AIAA-2006-2456

AIAA-2006-2458

AIAA-2006-2459

AIAA-2006-2460

AIAA-2006-2461

AIAA-2006-2462

AIAA-2006-2463

AIAA-2006-2464

AIAA-2006-2465

AIAA-2006-2467

Acoustic Characterization of a Pulse Detonation EngineA. Glaser, N. Caldwell, and E. Gutmark 709

Zero Splice Intake Technology and Acoustic BenefitsF. Gantie, H. Batard, N. Baker, and P. Schwaller 720

Far-field Directivity of Rotor-Alone Tones Radiated From FanIntakes with Spliced Liners for Different Intake Shapes, withFlowB. Tester and L. De Mercato 729

Quiet Technology Demonstrator 2 Intake Liner Design andValidationJ. Yu, E. Nesbitt, H. Kwan, S. Uellenberg, E. Chien, J. Premo,M. Ruiz, and M. Czech 747

Scattering of Acoustic Duct Modes by Axial Liner SplicesC. Tarn, H. Ju, and E. Chien 760

Nonlinear Modeling of Shock Wave Trains in Ducts with WallDiscontinuitiesJ. Alonso, J. Anderson, and R. Burdisso 784

Application of a Piston Radiation Model to Liner Non-Uniformities and Rigid SplicesJ. Alonso and R. Burdisso 798

Static and Flight Aeroacoustic Evaluations of a Scarf InletD. Weir, B. Bouldin, and J. Mendoza 808

Aero-Engine Noise Investigated from Flight TestsS. Guerinand U. Michel 827

Reduction of Approach Noise of the MD-11H. Siller, U. Michel, C. Zwiener, and G. Saueressig 839

Measurement of Approach Noise Footprints of a C-17 STOLAircraft During Conventional and Noise-Mitigating ApproachTrajectoriesW. Home, N. Bumside, C. Kitaplioglu, D. Schein, A. Welborn,and A. Liddle 852

Reducing Propulsion Airframe Aeroacoustic Interactions withUniquely Tailored Chevrons: 1. Isolated NozzlesV. Mengle, R. Elkoby, L. Brusniak, and R. Thomas 872

AIAA-2006-2468

AIAA-2006-2469

AIAA-2006-2471

AIAA-2006-2472

AIAA-2006-2473

AIAA-2006-2474

AIAA-2006-2475

AIAA-2006-2476

AIAA-2006-2477

AIAA-2006-2479

AIAA-2006-2480

AIAA-2006-2483

AIAA-2006-2484

Computational Analysis of the Effect of Porosity on Shock CellStrength at CruiseS. Massey, A. Elmiligui, R. Thomas, P. Pao, K. Abdol-Hamid,and C. Hunter 890

Optimized Boundary Compact Finite Difference Schemes forComputational AeroacousticsJ.Kim 908

Analysis of Aeroacoustic Wave Propagation Simulations Usinga Higher-Order Accurate MethodG. Efraimsson and C. Biela 922

Applications of Dual-Time Stepping and Finite-Volume Schemesin Computational AeroacousticsW. Lin 932

Improving an Unstructured CFD Solver for AeroacousticsApplicationsP. Geuzaine, L. Georges, S. Bogaerts, K. Hillewaert, and S. Caro....947

Noise Scattering by the Blended Wing Body Airplane:Measurements and PredictionC. Reimann, A. Tinetti, and M. Dunn 952

Prediction of Sound Scattered by Moving Bodies withApplications to Propeller-Driven AirplanesC. Testa, M. Gennaretti, and U. lemma 969

Experimental Investigation Into Trailing Edge Noise SourcesA. Garcia-Sagrado, T. Hynes, and H. Hodson 981

Incident Turbulence Interaction Noise from an Axial FanD. Fedala, S. Kouidri, R. Rey, T. Carolus, and M. Schneider 1003

Noise Validation of Model Fan Rig with EngineP. Schwaller, N. Baker, D. Tomlinson, P. Sijtsma, and R. Hemmings1014

Space-Time Correlations and Trailing Edge Flow Structure inFan-Blade Wakes with Trailing Edge BlowingA. Borgoltz, W. Devenport, and L. Craig 1026

Leapfrogging of Two Vortex-Rings as Test Case for VolumeSource ComputationsM. Jacob, A. Benyahia, D. Casalino, D. Eschricht, and F. Thiele 1055

A Look Inside the Lighthill Source TermM. Cabana, V. Fortune, and P. Jordan 1068

AIAA-2006-2485

AIAA-2006-2486

AIAA-2006-2488

AIAA-2006-2489

AIAA-2006-2490

AIAA-2006-2491

AIAA-2006-2492

AIAA-2006-2493

AIAA-2006-2494

AIAA-2006-2495

AIAA-2006-2496

AIAA-2006-2497

From Primitive-Variable Boundary-Integral Formulation to FWHEquationL. Morino 1087

Propagation and Stability of Vorticity-Entropy Waves in aNonuniform Flow0. Atassi 1097

Evaluation of Far-Field Sound with Open Surface Corrections toLighthill's EquationL. Cheung and S. Lele 1122

Direct Simulation of Acoustic Waves Emitted from MovingBodies by the Finite Difference Lattice Boltzmann MethodA. Tamura and M. Tsutahara 1137

TBL Noise Generated by a Simplified Side Mirror Configurationand Acoustic Transfer Through the Window: Modelling UsingActran and FluentS. Caro, A. Ramonda, F. Perot, S. Vergne, and M. Pechabat 1146

Interior Noise Sources Identifications, In-Flight Measurementsand Numerical Correlations of an Advanced Business AircraftF. Marulo, A. Sollo, M. Aversano, G. Russo, and T. Polito 1169

Hermite High-Order Finite Elements for Aeroacoustic AnalysisL. Morino and F. Cetta 1176

Simulation of Aero-acoustic Sources in Aircraft Climate ControlSystemsF. Mathey, O. Morin, B. Caruelle, and K. Debatim 1189

Experimental and Numerical Investigation of a Flow-InducedCavity Resonance with Application to Automobile BuffetingB. Crouse, S. Senthooran, D. Freed, G. Balasubramanian,M. Gleason, M. Puskarz, P. Lew, and L. Mongeau 1198

Investigating Broadband Shock-Associated Noise ofAxisymmetric Jets Using Large-Eddy SimulationD. Bodony, J. Ryu, P. Ray, and S. Lele 1216

Large Eddy Simulation of Screech Tone Generation in a PlanarUnderexpanded JetJ. Beriand, C. Bogey, and C. Bailly 1227

Large-Eddy Simulation of Hot Coaxial Jets1. Tristanto, G. Page, and J. McGuirk 1251

AIAA-2006-2499

AIAA-2006-2500

AIAA-2006-2501

AIAA-2006-2502

AIAA-2006-2503

AIAA-2006-2504

AIAA-2006-2505

AIAA-2006-2507

AIAA-2006-2508

AIAA-2006-2509

AIAA-2006-2510

AIAA-2006-2511

AIAA-2006-2512

High Frequency Noise Generation in the Near-Nozzle Region ofa JetA. Uzun and M. Hussaini 1264

Investigation Of The Noise From Cold And Heated SubsonicJetsP. Moore and B. Boersma 1296

Adjoint-Based Control of the Noise from a Turbulent MixingLayerR. Kleinman and J. Freund 1306

Numerical Simulation of the Generation of Airfoil Tones atModerate Reynolds NumbersC. Tarn and H. Ju 1316

Direct Noise Computation Around a 3-D NACA 0012 AirfoilO. Marsden, C. Bogey, and C. Bailly 1339

Direct Numerical Simulation of Noise from an Airfoil in aUniform FlowN. Hatakeyama and O. Inoue 1350

Computation of Trailing-Edge Noise Using a Zonal RANS-LESApproach and Acoustic AnalogyF. Mathey 1361

Transmission of Acoustic Perturbation Through Cavity/Slots inan Airfoil for Stall ControlK. Zaman and D. Culley 1369

Cavity Noise Generation for Circular and Rectangular VentHolesM. Czech, J. Crouch, R. Stoker, M. Strelets, and A. Garbaruk 1381

Generic Wind Tunnel Study on Side Edge NoiseR. Drobietzand I. Borchers 1394

Effects of Surface Roughness on Airframe NoiseY. Liu, A. Dowling, and H. Shin 1405

Unsteady Boundary Control for Optimal Control of TrailingEdge NoiseG. Chen and M. Hussaini 1426

A Combined RANS/Vortex Method for Predicting Noise fromVortex/Airfoil InteractionsZ. Zheng and Y. Xu 1443

AIAA-2006-2513

AIAA-2006-2514

AIAA-2006-2515

AIAA-2006-2516

AIAA-2006-2517

AIAA-2006-2518

AIAA-2006-2519

AIAA-2006-2520

AIAA-2006-2521

AIAA-2006-2522

AIAA-2006-2523

AIAA-2006-2524

AIAA-2006-2525

Prediction of Flat Plate Self-NoiseK. Chang, J. Seo, Y. Moon, and M. Roger 1451

DNS of Trailing-Edge Noise Generated by Boundary-LayerInstabilitiesR. Sandberg, N. Sandham, and P. Joseph 1465

Aeroacoustic Study of Airfoil Leading Edge High-Lift DevicesC. Andreou, W. Graham, and H. Shin 1478

Prediction of Sound Generated by a Pitching Airfoil: AComparison of RANS and LESS. Nagarajan, S. Hahn, and S. Lele 1491

The Computational Investigation of Resonant Sound-AbsorbingStructures ModelsV. Baklanov, A. Zayakin, E. Orlenko, and S. Postnov 1504

Investigation of Vortex Sound Propagation Using a FEImplementationM. Escobar, M. Kaltenbacher, I. Ali, and S. Becker 1509

Simulation of Acoustic Fields in Resonator-Type ProblemsUsing Unstructured MeshesI. Abalakin, A. Gorobets, T. Kozubskaya, and A. Mironov 1520

Validation and Application of a Hybrid Prediction Scheme forBypass Duct NoiseR. Sugimoto and J. Astley 1530

PML Absorbing Boundary Condition for NonlinearAeroacoustics ProblemsF. Hu, X. Li, and D. Lin 1543

Cartesian Cut-Cell Method with Local Grid Refinement for WaveComputationsM. Popescu, W. Shyy, and C. Tai 1558

A Statistical Approach to Optimum Design of Inlet AcousticTreatmentG. Zlavog and W. Eversman 1577

Optimization of an Electromechanical Helmholtz ResonatorF. Liu, S. Horowitz, L. Cattafesta, and M. Sheplak 1602

Optimisation of Traditional and Blown Liners for a SilentAircraftT. Law and A. Dowling 1614

AIAA-2006-2527

AIAA-2006-2528

AIAA-2006-2529

AIAA-2006-2530

AIAA-2006-2531

AIAA-2006-2532

AIAA-2006-2533

AIAA-2006-2534

AIAA-2006-2535

AIAA-2006-2536

AIAA-2006-2537

AIAA-2006-2538

AIAA-2006-2539

Comparison of Time-Domain Impedance Boundary Conditionsby Lined Duct FlowsC. Richter, F. Thiele, X. Li, and M. Zhuang 1631

A Computational Mode Matching Approach for Propagation inThree-Dimensional Ducts with FlowR. Astley, V. Hii, and G. Gabard 1652

Investigation of a Single-Point Nonlinearity Indicator in thePropagation of High-Amplitude Jet NoiseL Falco, A. Atchley, and K. Gee 1675

On the Perception of Crackle in Noise Radiated from Military JetAircraftK. Gee, V. Sparrow, A. Atchley, and T. Gabrielson 1681

Measurement and Prediction of Noise Propagation from a High-Power Jet AircraftK. Gee, V. Sparrow, M. James, J. Downing, C. Hobbs,T. Gabrielson, and A. Atchley 1690

Density Fluctuations in a Supersonic JetC. Stern, C. Aguilar, and M. Alvarado 1698

An Experimental Investigation of Density Gradient Fluctuationsin High-Speed Jets Using Optical DeflectometryB. Petitjean, D. McLaughlin, and P. Morris 1705

Effect of Heat on Space-Time Correlations in JetsJ. Bridges 1722

Experimental and Numerical Investigation of the Near FieldPressure of a High Subsonic Hot JetF. Muller, F. Vuillot, G. Rahier, G. Casalis, and E. Piot 1738

Wake Acoustic Analysis and Image Decomposition viaBeamforming of Microphone Signal Projections on WaveletSubspacesH. Wassaf, Y. Zhang, and O. Ibe 1752

Use of a Commercial Wind SODAR for Measuring Wake VorticesS. Mackeyand D. Burnham 1768

Influence of Vortex Core on Wake Vortex Sound EmissionZ. Zheng, W. Li, F. Wang, and H. Wassaf 1779

Atmospheric Effects on Microphone Array Analysis of AircraftVortex SoundH. Wassaf, J. Hardin, and F. Wang 1793

AIAA-2006-2540

AIAA-2006-2542

AIAA-2006-2543

AIAA-2006-2546

AIAA-2006-2550

AIAA-2006-2551

AIAA-2006-2553

AIAA-2006-2554

AIAA-2006-2555

AIAA-2006-2558

AIAA-2006-2559

AIAA-2006-2560

Scale Model Testing of Infrasound Produced by Various JetEngine Test Cell ConfigurationsK. Hatlestad 1802

A Contribution to the Understanding and Prediction of Jet NoiseGeneration by Forced Mixers: Part III ApplicationsB. Tester and M. Fisher 1809

An MDOE Assessment of Nozzle Vanes for High Bypass RatioJet Noise ReductionB. Henderson, T. Norum, and J. Bridges 1831

Variable Geometry Chevrons for Jet Noise ReductionF. Calkins, G. Butler, and J. Mabe 1841

Measurement of Acoustic Quantity Fields in Duct Flow by LaserDoppler VelocimetryM. Lavieille, F. Simon, and F. Micheli 1852

RACE Aero Acoustic Test Facility: Fan Forward and Rearward3D Noise MeasurementsN. Genoulaz, J. Julliard, C. Lozachmeur, and C. Caujolle 1861

Potential Errors Introduced in the use of Static Engine NoiseData not Acquired in Geometric FarfieldK. Ahuja and N. Turkdogru 1879

A Method to Account for Engine Noise Component SourceLocationsM. Salikuddin, D. Stimpert, and R. Majjigi 1895

Numerical Study of Aeroacoustic Oscillations in a TransonicFlow Downstream a Sudden Duct EnlargementT. Emmert, P. Lafon, and C. Bailly 1912

The Sub-Critical Flow Past a Generic Side Mirror and its Impacton Sound Generation and PropagationJ. Ask and L. Davidson 1925

Prediction of Wall Pressure Fluctuations on an AutomobileSide-Glass Using a Lattice Boltzmann MethodS. Senthooran, B. Crouse, S. Noelting, D. Freed, B. Duncan,G. Balasubramanian, and R. Powell 1945

Simulation of the Acoustics Behind a Wall Due to a MovingVehicleM. Aberg, R. Szasz, and L. Fuchs 1960

AIAA-2006-2561

AIAA-2006-2562

AIAA-2006-2563

AIAA-2006-2564

AIAA-2006-2565

AIAA-2006-2566

AIAA-2006-2567

AIAA-2006-2568

AIAA-2006-2569

AIAA-2006-2570

AIAA-2006-2571

AIAA-2006-2572

AIAA-2006-2573

Localisation of Flap Edge Sound Sources by Use of SpectralAnalysis and Flow InvestigationC. Tiedemann, G. Neuwerth, and R. Henke 1972

Low Noise Design Trends Derived from Wind Tunnel Testing onAdvanced High-Lift DevicesM. Fischer, H. Friedel, H. Holthusen, B. Golling, and R. Emunds....1986

Effect of Blade Design at Equal Loading on Broadband NoiseY. Rozenberg, M. Roger, and S. Moreau 2001

Airframe Noise Prediction by Acoustic Analogy: RevisitedF. Farassat, J. Casper, A. Tinetti, and M. Dunn 2021

Phased Array Measurement of High Lift Devices in Low SpeedWind TunnelH. Ura, Y. Yokokawa, and T. Ito 2045

Acoustic Beamforming and Holography Measurements ofModified Boundary Layer Trailing-Edge NoiseA. Faszer, T. Hynes, C. Blaabjerg, and H. Shin 2056

Airframe Noise Characteristics from Flyover Measurements andPredictionM. Pott-Pollenske, W. Dobrzynski, H. Buchholz, S. Guerin,G. Saueressig, and U. Finke 2069

Dicontinuous Galerkin Method for Computational AeroacousticsC. Peyret and P. Delorme 2083

Discontinuous Galerkin Implementation of the ExtendedHelmholtz Resonator Model in Time DomainN. Chevaugeon, J. Remade, and X. Gallez 2091

Direct Simulation of Acoustic Waves by Finite Volume LatticeBoltzmann MethodM. Tsutahara, T. Kondo, and K. Mochizuki 2111

Fundamental Aeroacoustic Capabilities of the Lattice-Boltzmann MethodB. Crouse, D. Freed, S. Senthooran, G. Balasubramanian, P. Lew,and L. Mongeau 2120

A Hermite-Taylor Algorithm for Simulating Subsonic ShearFlowsT. Hagstrom, J. Goodrich, and G. Zhu 2137

Aerodynamic Noise Prediction for Long-Span BodiesJ. Seo, K. Chang, and Y. Moon 2151

AIAA-2006-2574

AIAA-2006-2575

AIAA-2006-2576

AIAA-2006-2577

AIAA-2006-2578

AIAA-2006-2579

AIAA-2006-2580

AIAA-2006-2581

AIAA-2006-2582

AIAA-2006-2583

AIAA-2006-2584

AIAA-2006-2585

AIAA-2006-2586

An Attempt to Calculate Acoustic Directivity Using LBMR. Leung, R. So, E. Kam, andX. Li 2167

Rotational Effects on the Aerodynamics and Aeroacoustics ofWind Turbine AirfoilsS. Miller and P. Morris 2175

Large Eddy Simulation of Gust Noise Sources in a LowPressure Axial CompressorH. Reese, C. Kato, and T. Carolus 2189

Acoustic Monitoring of Axial Compressor Rotor BladeVibrationsJ. Anderson, S. Bailie, and W. Ng 2204

Noise Reduction and Efficiency Improvement Through VaneIndexing of a Two-Stage TurbineJ. Blaszczak 2221

Sound Generation in Centrifugal CompressorsT. Raitorand W. Neise 2230

Procedure for Separating Noise Sources in Measurements ofTurbofan Engine Core NoiseJ. Miles 2249

Restricted Acoustic Modal Analysis Applied to InternalCombustor Spectra and Cross-Spectra MeasurementsJ. Miles 2265

Sound Transmission in Strongly-Curved Slowly-VaryingCylindrical and Annular Lined Ducts with FlowE. Brambley and N. Peake 2292

Continuous Spectrum Growth and Modal Instability in SwirlingDuct FlowC. Heaton and N. Peake 2310

Mode Matching in Engine Ducts with Vortical FlowsG. Vilenski 2325

Development and Validation of a 3D Linearized Euler SolverJ. Lan and C. Breard 2336

Further Investigation of Acoustic Propagation Codes for Three-Dimensional GeometriesD. Nark, W. Watson, and M. Jones 2361

AIAA-2006-2587

AIAA-2006-2588

AIAA-2006-2589

AIAA-2006-2590

AIAA-2006-2592

AIAA-2006-2593

AIAA-2006-2595

AIAA-2006-2596

AIAA-2006-2597

AIAA-2006-2598

AIAA-2006-2599

AIAA-2006-2600

AIAA-2006-2601

CDUCT-LaRC Status - Shear Layer Refraction, and NoiseRadiationD. Nark and F. Farassat 2378

New Advances in the Use of Actran/TM for Nacelle Simulationsand Optimisation of IBM Clusters for Actran ParallelComputationsA. Mosson, S. Caro, M. Gontier, T. Knapen, L. Enault,and S. Drouilhet-Peyre 2397

A study in the near pressure field of co-axial subsonic jetsC. Tinney, P. Jordan, F. Coiffet, A. Guitton, and J. Delville 2409

Superdirective Acoustic Radiation by Vortex Pairing inSubsonic Excited JetsV. Fleury, C. Bailly, and D. Juve 2432

Noise Generation Mechanisms in Single and Coaxial JetsE. Groschel, W. Schroder, and M. Meinke 2448

Comparison of Jet Noise ModelsM. Afsar, A. Dowling, and S. Karabasov 2466

Experimental Validation of Instability Wave Theory for RoundSupersonic JetV. Kopiev, S. Chernyshev, M. Zaitsev, and V. Kuznetsov 2480

Prediction of Noise from High Speed Subsonic Jets Using anAcoustic AnalogyN. Raizada and P. Morris 2504

Unstructured CFD and Noise Prediction Methods for PropulsionAirframe AeroacousticsS. Pao, K. Abdol-Hamid, R. Campbell, C. Hunter, S. Massey,and A. Elmiligui 2526

Improved Jet Noise Modeling Using a New Acoustic Time ScaleM. Azarpeyvand, R. Self, and J. Golliard 2542

RANS-Based Noise Predictions of Jets with Internal ForcedMixersL. Garrison, A. Lyrintzis, and G. Blaisdell 2553

Noise Predictions for Chevron Nozzle FlowsS. Birch, D. Lyubimov, V. Maslov, and A. Secundov 2574

Pulsed Microjet Control of Supersonic Impinging Jets: AReduced-Order ModelJ. Choi, A. Annaswamy, and F. AM , 2584

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A Review of Axisymmetric Jet Flow Data for Noise ApplicationsS. Birch 2598

Integrated Aero-Acoustic Rotor Simulation and DesignOptimizationS. Xue, B. Docker, J. Narramore, and Z. Han 2613

Helicopter Interior Noise Reduction by Using Active GearboxStrutsF. Hoffmann, R. Maier, P. Janker, F. Hermle, and A. Berthe 2625

On Propeller Acoustics Design Synthesis Using SourceDistributions Along Blade SpanL. Campos and F. Lau 2635

Aeroelastic Modeling Effect in Rotor BVI Noise PredictionG. Bernardini, J. Serafini, S. lanniello, and M. Gennaretti 2651

Vortex-Shedding Noise and Potential-Interaction NoiseModeling by a Reversed Sears' ProblemM. Roger, S. Moreau, and A. Guedel 2660

Numerical Analysis of Noise Scattering Effects Due to theAirframe in Tilt Rotor SystemsD. Casalino, M. Genito, and A. Visingardi 2678

Comparison of Noise Reduction Effect Between AFC andConventional IBC by Moving Overlapped Grid MethodT. Aoyama, C. Yang, N. Kondo, and S. Saito 2694

The Influence of the Flame Structure on the CombustionOscillations in a Cylindrical ChamberP. Lacava, J. Carvalho, D. Ferreira, and M. Ferreira 2706

Adaptive Control of a Combustion Acoustics Model with InputSaturation Using Control HedgingR. Bansal and N. Ananthkrishnan 2716

Premixed Combustion Noise: Measurements and CorrelationsR. Rajaram, J. Gray, and T. Lieuwen 2731

Experimental and Numerical Investigation of the Acoustic Fieldin a Bluff Body CombustorR. Sivakumar, S. Chakravarthy, and V. Babu 2740

Prediction of Combustion-Generated Noise in Non-PremixedTurbulent Jet Flames Using LESM. Ihme, D. Bodony, and H. Pitsch 2753

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Time Resolved Combustion Noise Investigation Based on aWave Equation ApproachF. Flemming, M. Freitag, A. Sadiki, and J. Janicka 2769

Aft Fan Noise Shielding by Lifting Surfaces : Analytical,Numerical and Experimental ResultsJ. Chappuis, J. Ricouard, and M. Roger 2782

A Ray Tracing Approach to Calculate Acoustic Shielding by theSilent Aircraft AirframeA. Agarwal, A. Dowling, H. Shin, and W. Graham 2799

Aircraft Conceptual Design and Risk Analysis Using Physics-Based Noise PredictionE. Olson and D. Mavris 2819

Auralisation of Turbofan Engine Noise ComponentsH. Shin, C. Hall, and D. Crichton 2841

Optimal Conceptual Design of Aircraft Including CommunityNoise PredictionU. lemma and M. Diez 2855

The Low-Noise Potential of Distributed Propulsion on aCatamaran AircraftJ. Posey, M. Dunn, and A. Tinetti 2865

Prediction of Low Noise Aircraft Landing Gears andComparison with Test ResultsN. Molin, J. Piet, L. Chow, M. Smith, W. Dobrzynski, and C. Seror..2878

Aerodynamic Measurements of the 777 Main Landing GearModelA. Ringshia, P. Ravetta, W. Ng, and R. Burdisso 2888

Control of Noise Sources on Aircraft Landing Gear BogiesM. Smith, B. Fenech, L. Chow, N. Molin, W. Dobrzynski,andC. Seror 2902

A Semi-Empirical Model for Aircraft Landing Gear NoisePredictionY. Guo 2912

Prediction of Sound Generated by a Rod-Airfoil ConfigurationUsing a Cubic Explicit Algebraic Stress Model for DetachedEddy Simulation and the Generalised Lighthill/FW-H AnalogyB. Greschner, A. Gurr, F. Thiele, D. Casalino, and M. Jacob 2931

Noise Radiation from Single and Multiple Rods ConfigurationsF. Hutcheson and T. Brooks 2943

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A Hybrid RANS/LES Approach for Predicting Jet NoiseM.Goldstein 2967

An Assessment of Filtering Techniques for High-OrderAeroacoustics SimulationsI.AI-Qadi 2980

Large Eddy Simulations of Low-Mach Number Aeroacousticsfor Complex Wall-Bounded Turbulent Flows via aMultiblock/Characteristic Interface ApproachJ. Suh and S. Frankel 2986

An Optimized Large-Stencil Approach for Capturing Near-PIFrequenciesA. Ghasemi 3010

A Computational Method of Evaluating Non-Compact SoundBased on the Vortex Sound TheoryT. Takaishi, M. Miyazawa, and C. Kato 3023

An Investigation of Spectral Collocation Boundary ElementMethod for the Computation of Exact Green's Function inAcoustic AnalogyA. Jones and F. Hu 3037

Development of an Experimental Rig for Investigation of HigherOrder Modes in DuctsC. Gerhold, R. Cabell, and M. Brown 3054

Optimization of Sensor Arrays for Radial Mode Analysis in FlowDuctsU. Tapken and L Enghardt 3073

Validation of an Inverse Analytical Technique to Educe LinerImpedance with Grazing FlowT. Elnady, H. Boden, M. Musharraf, and B. Elhadidi 3093

Development and Qualification of an In-Situ Grazing FlowImpedance Measurement TechniqueJ. Simonich, S. Narayanan, B. Morin, and W. Patrick 3108

Turbofan Duct-Mode Identification Using Farfield NoiseMeasurements and Numerical PredictionsD. Venditti, A. AN, O. Mehdizadeh, and N. Joshi 3119

Fan Inlet Mode Detection from Measurements of the RadiatedSound FieldF. Castres and P. Joseph 3131

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Comparison of a Convected Helmholtz and Euler Model forImpedance Eduction in FlowW. Watson and M. Jones 3145

Localization of Multiple Types of Jet Noise SourcesD. Papamoschou and A. Dadvar 3168

Acoustic Efficiency of Azimuthal Modes in Jet Noise UsingChevron NozzlesC. Brown and J. Bridges 3185

Coherent Noise Radiation from a Jet Investigated with a Beam-Forming TechniqueT.Suzuki 3199

Phased-Array Study of Dual-Flow Jet Noise: Effect of Nozzlesand MixersS. Lee and J. Bridges 3213

Dynamics of Free Jets Modulated by Plane Acoustic Waves :Part 1. ExperimentsA. Birbaud, D. Durox, S. Ducruix, and S. Candel 3248

Experimental Study of the Properties of Near-Field and Far-FieldJet NoiseS. Barre, V. Fleury, C. Bogey, C. Bailly, and D. Juve 3264

Noise Sources in Controlled High Reynolds Number and HighSpeed JetsJ. Kastner, J. Kim, and M. Samimy 3278

Design and Implementation of a Phased Microphone Array in aClosed-Section Wind TunnelH. Shin, W. Graham, P. Sijtsma, C. Andreou, and A. Faszer 3291

A Large Polar Array for Full-Scale Aero-Engine Noise SourceLocation and BreakdownJ. Battaner-Moro 3303

Phased-Array Measurement of Modern Regional AircraftTurbofan Engine NoiseS. Lee 3315

Extension of DAMAS Phased Array Processing for SpatialCoherence Determination (DAMAS-C)T. Brooks and W. Humphreys 3337

Combined PSP and Microphone Array Measurements forAnalysis of Unsteady FlowsD. Long 3355

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AIAA-2006-2670

Analysis and Test of Spacecraft Structural Response UnderLaunch Acoustic EnvironmentM. Cheng, R. Shyu, D. Cheng, and C. Hsiao 3365

The Computational Investigation of Low-FrequencyVibroisolation Mounting Dynamic ModelV. Baklanov, S. Postnov, and A. Zayakin 3373

Probabilistic Finite Elements for Vibroacoustic ApplicationsT. Polito and F. Marulo 3378

Nonlinear Vibration of Clamped 2024-T3 Aluminum PanelsSubject to High Intensity NoiseB. Burgess and K. Frendi 3388

Smart Tuneable Dynamic Vibration AbsorbersB. Tiseo, A. Concilio, G. Koopmann, and A. Gianvito 3396

Numerical Simulation of the System "Engine-Mounting-Airframe" According to Experimental Data ResultsV. Baklanov and S. Denisov 3405

Effects of Geometric Details on Slat Noise Generation andPropagationM. Khorrami and D. Lockard 3413

Effect of Slat Settings (Gap and Overlap) on Slat Noise Basedon a Test Vortex Injected Upstream of the SLAT-HookR. Emundsand M. Fischer 3439

Attenuation of Slat Trailing Edge Noise Using Slat Gap AcousticLinersM. Smith, L. Chow, and N. Molin 3454

Slat Noise Trend Predictions Using CAA with Stochastic SoundSources from a Random Particle Mesh Method (RPM)R. Ewert 3465

3D Unsteady Flow Computations in a Slat Cove Using LargeEddy SimulationT. Imamura, S. Enomoto, and K. Yamamoto 3498

Dynamics of Free Jets Modulated by Plane Acoustic Waves :Part 2. Numerical SimulationsA. Birbaud, S. Ducruix, D. Durox, andS. Candel 3513

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Contrasting Code Performances for ComputationalAeroacoustics of JetsP. Tucker, J. Coupland, S. Eastwood, Y. Liu, R. Jefferson-Loveday,andO. Hassan 3530

Adjoint Linearised Euler Solver in the Frequency Domain for JetNoise ModellingS. Karabasov and T. Hynes 3550

A Nonlinear Shock-Refracted Acoustic Wave Model for thePrediction of Screech Amplitude in Underexpanded SupersonicJetsM. Kandula 3564

A Numerical Study of Nozzle Boundary Layer Thickness onAxisymmetric Supersonic Jet Screech TonesJ. Gao and X. Li 3580

Determination of Combustor Noise from a Modern RegionalAircraft Turbofan EngineM.Martinez 3592

Narrowband Model for Gas Turbine Engine Combustion NoisePredictionB. Schuster and L. Lieber 3611

Source Term Evaluation of the APE-RF SystemP. Bui, M. Meinke, and W. Schroder 3624

Folding Cavity Acoustic Liner For Combustion Noise ReductionJ. Yu and E. Chien 3635

The Effect of Blade Loading on Sound Sources in a DuctedRotorD. Stephens and S. Morris 3645

Fan Broadband Noise SimulationB. Tester, P. Sijtsma, P. Joseph, and C. Lowis 3657

Time-Domain Impedance Formulation Based on RecursiveConvolutionY. Reymen, M. Baelmans, and W. Desmet 3674

Impedance Models in Time Domain, Including the ExtendedHelmholtz Resonator ModelS. Rienstra 3688

Aero-Acoustics of Flow Duct Singularities at Low MachNumbersM. Abom, S. Allam, and S. Boij 3708

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Surface-Waves, Stability, and Scattering for a Lined Duct withFlowE. Brambleyand N. Peake 3718

Time-Domain Characterization of Acoustic Liner in a DuctK. Fung and X. Yang 3746

Sound Propagation in Ducts Lined with Porous Materials byMultimode Propagation MethodW. Bi and D. Lafarge 3769

On the Propagation of Plane Acoustic Waves in a Duct withFlexible and Impedance WallsK. Frendi and B. Vu 3778

Validation of a CAA Formulation Based on Lighthill's AnalogyUsing AcuSolve and Actran/LA on an Idealized AutomotiveHVAC Blower and on an Axial FanS. Caro, R. Sandboge, F. Shakib, R. Ambs, B. Schillemeit,and K. Washburn 3795

Adaptive Mesh Refinement Computation of Acoustic Radiationfrom an Engine IntakeX. Huang and X. Zhang 3813

Comparison of the Two Microphone Method and the ModalDecomposition Method for Acoustic Impedance TestingT. Schultz, L Cattafesta, and M. Sheplak 3826

Experimental Training and Validation of a System for AircraftAcoustic Signature IdentificationV. Quaranta and I. Dimino 3839

Sound Generation by Flow Around Simple Geometries:Simulation and ExperimentS. Becker, M. Kaltenbacher, I. Ali, M. Escubar, and C. Hahn 3849

Aeroacoustic Noise Source Mechanisms in Simple ExpansionChambersG. Rubio, W. De Roeck, M. Baelmans, P. Sas, and W. Desmet 3864

Numerical Analysis of a Blast Wave Using CFD-CAA HybridMethodI. Lee, D. Lee, S. Ko, D. Lee, and G. Kang 3873

Extent of Nonlinear Aeroacoustic Propagation from SingleFrequency-Domain Noise MeasurementsW. Lundberg 3882

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AIAA-2006-2718

Toward Noise Mitigation in High Speed and High ReynoldsNumber Jets Using Plasma ActuatorsM. Samimy, J. Kim, I. Adamovich, Y. Utkin, and J. Kastner 3885

Experiments on High-Speed Jets from Thrust VectoringRectangular NozzlesJ. Lee, A. Goss, and D. McLaughlin 3902

Effect of microjets on a high-subsonic jet. Parametric study offar-field noise reduction.T. Castelain, M. Sunyach, and J. Bera 3917

Aeroacoustic Improvements to Fluidic Chevron NozzlesB. Henderson, K. Kinzie, J. Whitmire, and A. Abeysinghe 3928

Effect of Nozzle Geometry on Jet Noise Reduction Using FanFlow DeflectorsD. Papamoschou and R. Shupe 3937

Modeling of Piezoelectric Actuators for Active Control of JetNoiseG.Butler 3957

A Focused Beamformer Technique for Separating Rotor andStator-Based Broadband SourcesC. Lowis and P. Joseph 3973

A Comparison of Iterative Deconvolution Algorithms for theMapping of Acoustic SourcesK. Ehrenfried and L. Koop 3987

Noise Source Localization and Optimization of Phased ArrayResultsP. Ravetta, R. Burdisso, and W. Ng 4006

Acoustic Source Localization in Aircraft Interiors UsingMicrophone Array TechnologiesB. Sklanka, J. Tuss, R. Buehrle, J. Klos, E. Williams, and N. Valdivia4029

Acoustic Imaging of Aircraft Noise Sources Using LargeAperture Phased ArraysL. Brusniak, J. Underbrink, and R. Stoker 4036

New Noise Source Mechanism of Flow/Surface Interaction asApplied to Airframe Noise ReductionV. Kopiev, M. Zaitsev, and N. Ostrikov 4056

Sound Radiation from an Annular Duct with Jet Flow and aLined CenterbodyA. Demirand S. Rienstra 4075

AIAA-2006-2719 Far-Field Evaluation of the Noise Radiated by a Side MirrorUsing LES and Acoustic AnalogyH. Posson and F. Perot 4076

AIAA-2006-2720 The Quiet Technology Demonstrator Program: Flight Validationof Airplane Noise-Reduction ConceptsW. Herkes, R. Olsen, and S. Uellenberg 4079