DOIONLINE

DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-14919

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International Journal of Mechanical and Production Engineering (IJMPE)-IJMPE
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Volume Issue
Issue
Volume-7,Issue-1  ( Jan, 2019 )
Paper Title
Laminar-Turbulent Transition Influence on Aerodynamic Performance of Super-Effective Car
Author Name
M.Stajuda, F.Dymarczyk, M.Bystrzejewski, B.Jakubczak, P.Gutowski
Affilition
Lodz University of Technology, Faculty of Mechanical Engineering, Institute of Turbomachinery, 90-924 Lodz, 219/223 Wolczanska Street Poland
Pages
47-53
Abstract
Most of super-effective car aerodynamic simulations are performed as fully turbulent. This is to a certain extent justified, but due to close to critical Reynolds number value, the fully turbulent model may not be perfectly adequate, especially that for such a vehicle small changes in drag are important. This paper investigates how laminar-turbulent transition influences the drag and lift characteristics of a super effective car. The analysis compares fully turbulent solution with SST turbulence model with and without Gamma-Theta transitional turbulence modelling. The study is performed for 3 different car body shapes to investigate more general influence of applying laminar-turbulent transition instead of fully turbulent simulations. The results indicate that for every model the difference in drag and lift is above 20%.
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