521
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RWTH Publication No: 852581 2022   IGPM521.pdf |
TITLE |
Analytical investigation of 1D Darcy-Forchheimer flow under local thermal nonequilibrium |
AUTHORS |
Siegfried Müller, Michael Rom |
ABSTRACT |
In the context of transpiration cooling, a 1D porous medium model consisting of a temperature
system and a mass-momentum system is derived from the 2D/3D Darcy-Forchheimer equations. The
temperatures of the coolant and the solid are assumed to be in local nonequilibrium. This system is
analytically verified to have a unique solution. Transpiration cooling simulations are performed by a
two-domain approach, coupling the assembled 1D porous medium solutions with 2D solutions of a
hot gas flow solver. A comparison of results obtained by applying the 1D porous medium model with
the temperature system either including or neglecting fluid heat conduction justifies the use of the
latter simplified system |
KEYWORDS |
transpiration cooling, 1D porous medium flow, Darcy-Forchheimer, local thermal nonequilibrium |