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INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND - Volume 6, Issue 8,, December 2017 (Special Issue)

Pages: 1265-1274

Date of Publication: 29-Dec-2017


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Simulation ofAerodynamic Flow Parametersovera Simplified Sedan Car

Author: Sujit Mishra1? Ashok Misra2?? P.S.V.Ramana Rao3??? D.Nageswar Rao4????

Category: Engineering, Science and Mathematics

Abstract:

Huge demand of sedan cars due to the economic developments in the society leads to increasing competitions in automobile sectors which undergo different testings to enhance the fuel efficiency and performance of these cars where vehicle aerodynamics plays avital role. Aerodynamics affects the performance of sedan cars due to change in parameters such as lift and drag forces at high speed. With the improvement in computer technology, manufacturers are looking at computational fluid dynamics(CFD) modelling of sedan carsinstead of wind tunnel testing to reduce the testing time as well as the research & development cost.In the present study, a simulation is done with ANSYS v15 taking Second Order Upwind Schemeto obtain the results of different flow parameters viz. drag force, drag coefficient, turbulent kinetic energy and wake flow structures over a benchmark test model- 3D Ahmed body which is a simplified sedan car.It is observed thatthe results of the present simulation with regard to drag coefficient are found to be in close agreement with the existing wind tunnel experimental results.This scheme can further be used to optimize the shape of the mid-range sedan carswith safety handling capabilities even at higher speeds and to enhance their fuel efficiency.

Keywords: CFD modelling, Wind tunnel, Aerodynamics, Ahmed body, Sedan car