This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Zonal Method for Predicting External Automobile Aerodynamics
Annotation ability available
Sector:
Language:
English
Abstract
A system of computer codes for investigating the flow around three-dimensional bodies is introduced. The system is based on the zonal approach, where different methods are used in three different regions of the flow field. By tailoring the method to the flow properties in each region, computations of the flow around the body may be carried out in a fraction of the time required for a single-zone Navier-Stokes solution. In the paper, results are presented for an automobile-like body frequently used as a test case in automotive aerodynamics. It is shown that the important features of the wake flow are well predicted, although the the change from the high drag to the low drag case near the critical slant angle is more gradual than indicated by the experiments.
Authors
Topic
Citation
Larsson, L., Broberg, L., and Janson, C., "A Zonal Method for Predicting External Automobile Aerodynamics," SAE Technical Paper 910595, 1991, https://doi.org/10.4271/910595.Also In
References
- Zhang, D.H. Broberg, L. Larsson, L. “A Numerical method for Generating Smooth Body Fitted Coordinate Systems Suitable for Ship Stern Flow Calculations” International Symposium on Ship Resistance and Powering Performance Shanghai 1989
- Hess, J.L. Smith, A.M.O. “Calculation of Non-Lifting Potential Flow about Arbitrary Three-Dimensional Bodies” Douglas Aircraft Company ReportNo. E S 40622 Long Beach 1962
- Ni, S.Y. Kim, K.J. Xia, F. Larsson, L. “A Higher Order Panel Method for Calculating Free Surface Potential Flows with Linear Surface Boundary Conditions” International Symposium on Ship Resistance and Powering Performance Shanghai 1989
- Xia, F. Johansson L-E. Larsson, L. “Experimental and Theoretical Studies of Boundary Layer Transition on Ship Models” 2nd International Symposium on Ship Viscous Resistance Gothenburg 1985
- Larsson, L. “A Calculation Method for Three-Dimensional Turbulent Boundary Layers on Ship-Like Bodies” 1st International Conference on Numerical Ship Hydrodynamics Washington D.C. 1975
- Cousteix, J. Quemard, C. “Velocity Profiles and Wall Shear Stress of Three-Dimensional Turbulent Boundary Layers” Euromech 33 Berlin 1972
- Broberg, L. “Numerical Calculation of Ship Stern Flow” Department of Mechanics, Chalmers University of Technology Gothenburg 1988
- Larsson, L. Broberg, L. Kim, K.J. Zhang, D.H. “New Viscous and Inviscid CFD Techniques for Ship Flows” 5th International Conference on Numerical Ship Hydrodynamics Hiroshima 1989
- Ahmed, S.R. Ramm, G. Faltin, G. “Some Salient Features of the Time Averaged Ground Vehicle Wake” SAE Technical Paper Series 840300 1984
- Misegades, K.P. “1988 Automobile Aerodynamics Workshop” Cray Research Inc Report CFD-1-1088 1988
- Broberg, L. “Calculation of the Flow Around Automobiles, Part I” SSPA Maritime Consulting, Report No 8108-1 Gothenburg 1988