Flow Simulation With AcuSolve to Improve Railway Vehiclesaltairatc.com/.../Keynotes_Tuesday/AcuSolveEHTC2011NipponSharyo.… · 2011 European HyperWorks Technology Conference 8th

2011 European HyperWorks Technology Conference

8th November, 2011Bonn, Germany

Flow Simulation With AcuSolve to Improve Railway Vehicles

SATO, TetsuroNIPPON SHARYO, [email protected]




Nagoya

OsakaTokyoNagoya

Toyokawa Plant

Tokyo

Head office : Nagoya, JAPAN

Establishment : September 1896

Paid-in capital : 11,810 million yen

Sales : 94,842 million yen ( 896M Euro : FY 2010 )

Employees : 1,969 ( Apr. 2010 )

Production capacity :

600 Commuter cars / year

Corporate Profile

Fig. 1



Type 3000for Yokohama City Subway

Series 9000for Keio

Type 3000for Keisei

Type 220 DCfor JR kyushu

Series 3300for Nagoya Railroad

Series 08for Tokyo Metro

Series 313for JR Centraｌ

Series 8000 Tilting SystemFor JR Shikoku

Type 7000for Nagoya City Subway

Type 50000 Articulated Trainfor Odakyu

Series 2000 Airport Expressfor Nagoya Railroad

Series 281DC Tilting Systemfor JR Hokkaido

“LINIMO” HSST-100for Aichi Rapid Transit

Series 383 Tilting Systemfor JR Central

YURIKAMOME Series 7000New Transit System

Series 215for JR East

Series 187DC Tilting Systemfor JR West

Latest domestic trains

Fig. 2

AE “Sky access”for Keisei

Series 683for JR West

Series 07for Tokyo Metro

Type 3000for Odakyu



California

Taiwan

Thailand

Indonesia

Indiana

MarylandLos Angeles

Venezuela

Argentina

Singapore

U.S.A.

Philippines

Taiwan

Illinois

Trains in the world

Fig. 3

Brazil



3,202 Shinkansen cars for revenue service

Shinkansen (bullet train) Series 0

Series 100

Series 300

Series 200

Series E2

Series 700

Series N700

Type 923

1964

1986

1992

19821997

2007

1999

2000

Series 500

1997

210 km/h

230 km/h

270 km/h

285km/h

300 km/h Fig. 4

300 km/h

2004Series 700T

220 km/h 275

km/h



CFD for railway vehicles

ProductivityFSW joining process

AmenityVibration excitationTunnel entry noise

AeroacousticsHVAC

SafetyCross-wind load estimation

Passing-trains aerodynamics



1. Cross wind load estimation

Fig. 5 Time-average wind velocity

Plan A Plan B



2. Trains passing by each other

Ａ，Ｂ

Main interest : Intermediate car

Criteria : Unsteady load caused by the opposite train

Wind velocity at the ground level. Fig. 6



Main interest : Leading car design, ride comfort

Criteria : Aerodynamic forces acting on every car, Maximum/minimum of local pressure and wind velocity

Parameters : Leading car design, train velocities

3. Full transient passing-by

Fig. 7



4. Mitigating aerodynamic excitation

Fig. 8 Unsteady flow over the trailing car

Main interest : Ride comfort of the trailing car



Breakdown of vortices

Fig. 9 Breakdown of trailing vortices



5. Train shape optimization to minimize the tunnel entry noise

Fig. 10 Tunnel entry pressure wave



Tunnel entry flow simulation

Fig. 11 Moving boundary problem



Tunnel entry experiment

Fig. 12 Tunnel entry experiment



3D shape optimizationusing the “specific response”

Fig. 13 Tunnel entrance



Specific response of the tunnel

Fig. 14 Spatially non-uniform response function



3D shape optimization to minimize the tunnel entry noise

Fig. 15 Shape optimization



3D shape optimization to minimize the tunnel entry noise

Fig. 16 Shape optimization



6. Reduction of the noise from the door frame

Fig. 17 Door frame



FE model

Fig. 18 Aeroacoustics; flow model



Horizontal cross section

Fig. 19 Aeroacoustics; flow field



Intensity of dipole noise source

Fig. 20 Pseudo-sound



Acoustic analysis

Fig. 21 Aeroacoustics; Near sound field



Shape improvement

Fig. 22 Shape improvement



7. Heating,Ventilating andAir Conditioning system

Fig. 23 Unsteady cabin flow simulation

Objective : Inlet and outlet design, suitable for both summer and winter.

Forced convection, Free convection, Radiation, Unsteady flow with turbulence model, Heat transfer, Heat load, Solar radiation



HVAC system

Fig. 24 Cooling; Average flow field



HVAC system

Fig. 25 Heating; Average Flow Field



8. Friction Stir Welding

Fig. 26 Self-Reacting Pin Tool

Objective : Optimization of the tool, welding parameters



Butt welding

Fig. 27 F.E. mesh & boundary conditions

“Outflow” B.C.

“Inflow” B.C.



Temperature

Fig. 28 Result; U=2500mm/min, 2000rpm



Particle Tracing

Fig. 29 Result; U=2500mm/min, 2000rpm



Conclusions

Numerical simulation conducted by acuSolve is useful in getting the ideas for making decision.

It helps us improve our railway vehicles.



Thank youDanke

http://www.n-sharyo.co.jp/

mail: [email protected]



References Predicting the Wind Noise from the Pantograph Cover of a Train,

Intl. J. for Numerical Methods in Fluids, Vol.24, Issue 12 (1997) Solution of Train Tunnel Entry Flow Using Parallel Computing,

Computational Mechanics,Vol.23, No.2(1999) A Numerical Evaluation of Aerodynamic Noise from a Shallow Cavity on a

High-Speed Train Surface, Proc. JSME annual meeting (2000-1) Numerical Analysis of Aerodynamic Noise Radiation from a High-Speed Train

Surface, J. of Sound and Vibration, Vol.23 No.2(2001) Prediction of the Compression Pressure Wave Generated by a High-Speed

Train Entering a Tunnel, Intl. J. of CFD, Vol.19 No.1(2005) Designing of FSW Parameters with Finite Element Flow Simulation, Proc. 6th

Intl. FSW Symp.(2006) Three-Dimensional Shape Optimization for Reducing the Compression

Pressure Wave Generated by a High-Speed Train Tunnel Entry, Proc. 20th

Computational Mechanics Conference (2007) Three-Dimensional Shape Design of a High-Speed Train for Reducing the

Compression Pressure Wave Generated by a Tunnel Entry, Proc. 16th JSME Translog conference (2007)

Numerical Simulation of Friction Stir Welding of Lap Joint, Proc. The National Meeting of JWS, No. 83 (2008)

Tool Development by Numerical Simulation, Proc. 8th Intl. FSW Symp.(2010) Finite Element Analysis of Friction Stir Welding Affected by Heat Conduction

through the Welding Jig, Proc. 11th Intl. Aluminium conf. INALCO (2010)

Documents

Flow Simulation With AcuSolve to Improve Railway Vehiclesaltairatc.com/.../Keynotes_Tuesday/AcuSolveEHTC2011NipponSharyo.… · 2011 European HyperWorks Technology Conference 8th