Numerical Simulation of Unsteady Natural Convection in a Simplified Engine Bay Enclosure under Soak Conditions

Paper #:
  • 2014-01-0651

Published:
  • 2014-04-01
DOI:
  • 10.4271/2014-01-0651
Citation:
Wang, Z., Han, J., and Mukutmoni, D., "Numerical Simulation of Unsteady Natural Convection in a Simplified Engine Bay Enclosure under Soak Conditions," SAE Technical Paper 2014-01-0651, 2014, doi:10.4271/2014-01-0651.
Pages:
7
Abstract:
At the onset of soak, air and surface temperatures in an engine bay enclosure are elevated since temperature of heat sources are high while convective cooling is sharply reduced as a result of airflow being shut off from the inlet grilles of the vehicle leading to temperature spikes. Accurate simulation of this important thermal and flow regime that is natural convection driven, highly transient and complex is therefore very important.In this investigation, we simulate flow in the engine bay at the onset of soak with fixed thermal boundary conditions where the geometries representing the engine bay and components are simplified. Good agreement was observed with detailed experimental data available in references for both velocities and temperatures.
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