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Assessment of Engine Cooling Performance by Measurement of Cooling Airflow Drag in Aerodynamic Wind Tunnels
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English
Abstract
In this paper we discuss a method for determining heat transfer behaviour during tests in aerodynamic wind tunnels. The method involves computing the heat power evacuated by the heat exchanger as a function of the cooling airflow drag. Using dimensional analysis techniques, we define a Thermal Efficiency Coefficient (TEC). Systematic tests on three geometrically different types of vehicles show that there is a universal law governing the variation in TEC with cooling airflow drag. By associating the curve for this universal law with the characteristic curve for the heat exchanger alone, we can compute a TEC value for a measured cooling airflow drag value, and thus determine the vehicle's engine cooling performance during aerodynamic tests.
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Citation
Chometon, F. and Gilliéron, P., "Assessment of Engine Cooling Performance by Measurement of Cooling Airflow Drag in Aerodynamic Wind Tunnels," SAE Technical Paper 980428, 1998, https://doi.org/10.4271/980428.Also In
References
- McADAMS W.H. Heat Transmission Third McGraw-Hill International Editions Chemical Engineering Series 1958
- CHOMETON F. GILLIERON P. Analysis of Three-Dimensional Separated Flow around Road Vehicles using a Zero-Dimension Model SIA Journal Ingénieurs de l'Automobile 50 56 March 1997