This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Airflow and Thermal Analysis of Underhood Engine Enclosures
Annotation ability available
Sector:
Language:
English
Abstract
A numerical model that utilizes Computational Fluid Dynamics (CFD) techniques has been developed for the analysis of underhood engine cooling systems of large slow moving vehicles. Several physical models have been developed and incorporated into a CFD code including; a) a model for predicting pressure losses due to screens and grills; b) a model for approximating the forces exerted by the fan on the flow; and c) a model for calculating the heat transfer inside the radiator.
The CFD code and physical models have been demonstrated and validated against experimental data. Several three dimensional computational grids that represent various engine enclosures have been created and used to analyze the fluid flow and heat transfer inside the engine enclosure system. The computational results are compared to test data which were obtained for this study. The results are presented in the form of predicted pressure drop and system total flow rate in addition to velocity vectors and temperature distribution inside the engine enclosure.
Recommended Content
Authors
Citation
Habchi, S., Ho, S., Elder, J., and Singh, S., "Airflow and Thermal Analysis of Underhood Engine Enclosures," SAE Technical Paper 940316, 1994, https://doi.org/10.4271/940316.Also In
References
- Przekwas, A.J. Habchi, S.D. Yang, H.O. Avva, R.K. Talpallikar, M.V. Krishnan, A. “REFLEQS-2D: A Computer Program for Turbulent Flows With and Without Chemical Reaction, Volume 1: User's Manual,” CFDRC Report GR-88-4 1988
- Przekwas, A.J. Habchi, S.D. Yang, H.Q. Avva, R.K. Talpallikar, M.V. Krishnan, A. “REFLEQS-3D: A Computer Program for Turbulent Flows With and Without Chemical Reaction, Volume 1: User's Manual,” CFDRC Report GR-90-2 1990
- Ratcliff, M.L. Smith, C.E. “REFLEQS-2D: A Computer Program for Turbulent Flows With and Without Chemical Reaction, Volume 2: Validation Manual,” CFDRC Report GR-88-4 April 1989
- Smith, C.E. Ratcliff, M.L. Przekwas, A.J. Habchi, S.D. “Validation of an Advanced Turbulent Combustion Code: REFLEQS,” 7th SSME CFD Workshop NASA MSFC April 1989
- Yang, H.Q. Habchi, S.D. Przekwas, A.J. “A General Strong Conservation Formulaton of Navier-Stokes Equations in Non-Orthogonal Curvilinear Coordinates,” AIAA 30th Aerospace Sciences Meeting and Exhibition Jan. 1992
- Launder, B.E. Spalding, D.B. Comp. Method. Appl. Mech. Eng. 3 269 1974
- Kays, W.M. London, A.L. Compact Heat Exchangers McGraw-Hill 3rd 1984
- White E.M. “Fluid Mechanics” McGraw, Hillbook Company 1979
- Habchi, S.D. Ho, S.Y. Przekwas, A.J. “Airflow and Thermal Analysis of Engine Cooling Systems,” CFDRC Final Report 4220/1 for Caterpillar, Inc. August 1993