Breda, May 2010

Company Overview

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Contents

• Introduction of Actiflow• 2 categories of engineering services• What is Aero Consulting• The tool of CFD• Some reference projects of Aero Consulting• What is Design Engineering• Analysis, Design, prototyping and testing• Some reference projects of Design Engineering

Company Overview

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Actiflow is an engineering company with a focus on aerodynamics

• Actiflow is founded in 2005 as a spin-off of Delft University of Technology• Young, ambitious and committed team of 11 skilled engineers• Focused on delivering high quality solutions while keeping close cooperation with clients• Actiflow has its own high performance computing cluster and has a workshop to build

prototypes and perform testing

Company Overview

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The engineering work can be split into two main categories

• Aero consulting: advising clients in the fields of aerodynamics, fluid flows, ventilation & air conditioning, fire & smoke, etc.

• Design engineering: Conceptual design and engineering of high-tech products, including prototyping and testing.

Company Overview

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Aero Consulting is centered around airflow simulations and aerodynamic studies for various industries

• Aerospace• Automotive• Consumer products • Fire and smoke• HVAC studies• Medical flow analysis• Oil & Gas flow dynamics• Pump and fan analysis• Spreading of pollutants• Wind hindrance• Wind turbine analysis

Aero Consulting

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Computational Fluid Dynamics (CFD) is the tool used to provide insights into flow phenomena

• Through the high performance cluster, complex problems can be handled in short time• Software used by Actiflow:

– CAD modeling: Rhinoceros, SolidWorks– CFD and flow visualization: ANSA,

OpenFoam, Star-CCM+, Xfoil, RFoil,FDS, Pyrosim, Paraview

– Data analysis and model building: Matlab

Pre-processing Solving Post-processing

Aero Consulting

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Reference projects: Fire and smoke simulation in an atrium

• Fire and smoke behaviour was analysed in an atrium• Efforts were done to keep all escape routes free of smoke• Insight in the fire and smoke behavior can be used to design ‘RWA’ systems• Simulations can be used to determine escape routes in buildings• Gas temperature and radiation determine both human safety and structural requirements

Smoke Flow velocity

Aero Consulting

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Reference projects: Air quality inside large building

In building physics, the air quality determines the comfort.

This comfort factor (Fanger model) is a relation between:• Humidity• Air speed• Air temperature

Temperature distribution at the ground floor of a 90m high building

Temperature distribution

Velocity distribution Critical areas

Aero Consulting

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Reference projects:Ventilation in Ahoy Rotterdam

For the renovation of the Ahoy event hall in Rotterdam, Actiflow performed a CFD analysis of the newly designed ventilation/air conditioning system

Aero Consulting

Cloud visualization of airspeeds

Velocities illustrated with vectors

CAD overview of HVAC system

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Reference projects: Concentration of pollutants & spreading due to wind

• Ammonia is widely used as coolant. The leakage of this coolant has harmful effects to its nature and surroundings. With CFD insight was given in the diffusion process of the gas.

• The spreading of other pollutants like soot are reproduced• With CFD critical locations of CO2 concentration in rooms are found • Welding fumes in workshops are visualized

Aero Consulting

Revolving door between a smoke free and smoking area

Diffusion of fumes from a chimney

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Reference projects: Wind hindrance study

Large buildings have influence on the wind flows and the user comfort in the surrounding area or in partially open spaces. With CFD insight is provided for:

– Wind loads on structures like solar panel arrays on the roof of the building– The working and design of natural ventilation systems– The build-up of strong flows around corners– Study conform NEN8100

Top view of the airflow around a greenhouse

Aero Consulting

Streamlines and pressure around group of buildings

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Reference projects: Wind turbine analysis

Validated tools used to analyze new wind turbine blades: – Use of XFoil and RFoil for designing new airfoils– Use of BEM for twist and taper design in order to optimize the tip speed ratio, the

number of blades, the design angle of attack and the design lift coefficient– Use of Fast to simulate all time-dependant performance parameters

Aero Consulting

Angle of attack in function of time

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Reference projects: Multi-element airfoil analysis

• Through calculations the forces acting on the different elements were examined• Angle of attack and flap position were optimized for several conditions • Insight into the induced drag was provided• The gap between the elements was optimized

Aero Consulting

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With Design Engineering, ideas are turned into new products

• Actiflow offers engineering and support from the conceptual brainstorm and design up to the basic engineering of high-tech products. If desired, prototyping and testing can be incorporated in the project

• Our design engineering department is a small team of highly skilled designers and engineers, cooperating on one single work floor

• Concept design and basic engineering can be delivered• Support can be provided during all phases of product development

Design Engineering

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Different kind of tools are used to validate the designs

• Analysis & design with in-house development models• Our workshop is used for prototyping and testing• All kinds of measurements are possible:

– Flow speeds (0.02-70m/s)– Temperature and humidity– Pressures (Scanivalve)

Design Engineering

In-house developed flow models

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Reference projects: Development of an active suction system for Ferrari S.p.A.

• We offer a full design chain, from the first idea to a ready-to-produce system• In-house prototyping and testing ensures a fast response to design changes

Design

CFD Simulation

Prototype

Track Test

Design Engineering

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Reference projects: Improvement ground simulation Audi aero-acoustic wind tunnel

• Existing ground panels of wind tunnels are replaced by smart suction systems

• The Actiflow systems avoid the negative secondary effects due to local removal of the boundary layer over the wind tunnel floor

Design Engineering

A small Actiflow system installed next to a moving beltSource: Audi AG

Flow direction

Actiflow system

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Reference projects: Development of a small domestic wind turbine

• Based on the product specifications of the client, Actiflow designed both the rotor blades and the duct of a small wind turbine for domestic use;

• CFD analysis and wind tunnel tests were performed, showing exactly the same performance (difference of less than 3%).

Design Engineering

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Reference projects: Active aerodynamics applied to a wind turbine airfoil

• A new airfoil equipped with a suction system was designed and tested in the wind tunnel• Through the application of our flow control systems on wind turbine blades, we can use

thicker blades without aerodynamic penalty, reducing weight and production costs • This project is carried out in cooperation with Delft University of Technology (DUWIND)

Design Engineering

Without suction

With suction

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Reference projects:Medical heating blankets

• Past projects have proven the value of CFD as a tool in the development of medical devices such as infant incubators, respiratory machines and heated blankets

• CFD calculations can be combined with measurements for validation of the results• For the Surgical Company, Actiflow optimized the heat and flow distribution inside the

blankets. The concepts were produced inside workshop and successfully demonstrated.

Courtesy of The surgical company

IR-image

CFD-image

Original blanket: Unevenly distributed outflow and temperature

Optimized blanket:Uniform temperature and outflow

Design Engineering

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Actiflow’s company policy:

• State-of-art fluid dynamics analysis combined with long term practical experience• Direct communication under full commitment• Total problem analysis approach• Highest operational standard of competence, innovative spirit and flexibility • Complete fluid dynamics project responsibility with consolidated knowledge in CFD,

measuring technology and measuring equipment • Problem analysis with fundamental research and implementation• Flexibility within your operational requirements and company policies• Focus on delivering high quality customized solutions, while cooperating closely with our

clients in an open atmosphere

Company Overview

Describe us your case and

we will tell you what we can do for you

Actiflow BV

Zinkstraat 22

4823 AD Breda

The Netherlands

contact@actiflow.com

www.actiflow.com

Tel: +31 765 422 220