Numerical Flow Simulation for a Generic Vehicle Body on Wheels with Variable Underbody Diffuser 2012-01-0172
Being a continuous subject of research, the authors present in this paper new aspects and results concerning the relevance of diffusers in vehicle aerodynamics. In the first stage of investigation, a generic car model with wheels was considered, starting from the Ahmed body, and the effect of adding wheels to the body was studied. Latter, the influence of diffuser length and angle, within ranges relevant to hatchback passenger cars, on drag and lift was studied for the Ahmed body with wheels. The results show that the addition of wheels and wheelhouses results in increasing of drag and lift due to the vortices which originate from the wheels. Concerning the underbody diffuser, the results show that both drag and lift of the bluff bodies with wheels are reduced with increasing diffuser length for moderate values of angle, up to six degrees for the cases studied.
Citation: Huminic, A. and Huminic, G., "Numerical Flow Simulation for a Generic Vehicle Body on Wheels with Variable Underbody Diffuser," SAE Technical Paper 2012-01-0172, 2012, https://doi.org/10.4271/2012-01-0172. Download Citation
Author(s):
Angel Huminic, Gabriela Huminic
Affiliated:
Transilvania University
Pages: 9
Event:
SAE 2012 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Vehicle Aerodynamics, 2012-SP-2333
Related Topics:
Simulators
Wheels
Drag
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