This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A New CFD and Thermal Analysis Method Based On MpCCI
Technical Paper
2006-05-0059
Sector:
Language:
English
Abstract
Vehicle thermal protection is of vital importance for the
development process of passenger cars. Tightly packaged engine
compartments and strongly increased engine power demand extensive
testing and more and more numerical analysis. Underhood component
temperatures are sensitive to all three modes of heat transfer,
conduction, convection and radiation. Due to very high temperatures
next to the exhaust system, in particular, a thermal radiation
analysis is required. The different numerical properties of the
three physical modes can be handled separately by sophisticated but
specialized simulation codes. This paper proposes a partitioned
approach for the multi-physics, 3-D simulation methodology based on
coupling the commercial CFD code StarCD™, the radiation code
POSRAD™ and the finite element code PERMAS™ by the Coupling
Software MpCCI™.
The applicability of this methodology is demonstrated by a
simplified exhaust system. The surface temperature is computed
considering both - internal and external flow. Air and exhaust gas
temperatures are coupled with the thermal analysis.
In the near future a similar methodology will be used to perform
thermal analyses of the engine compartment and the entire car. The
new trilateral coupling approach is supposed to be more accurate,
especially in regions with a very strong coupling between
temperature and velocity field.