SIMULATIONS ON TRANSPIRATION COOLING FOR SUPERSONIC FLOW

摘要

For the present study the ITLR supersonicrncombustion experimental facility was used torninvestigate the transpiration cooling efficiency ofrnC/C materials. The tested sample had a porosityrnof ε=16.1% and was exposed to supersonic (M=2.1)rnflow conditions at moderate total temperature levelsrnof the main flow at Tt,g=450 K. The surfacerntemperature of the C/C material was measured withrnthermocouples and infrared thermography.rnThese experimental data were used to validate userdefinedrnsubroutines with the commercial CFD-ACErncode for the computation of the transpirationrncooling mechanisms within porous materials. Thernmethod follows a strongly coupled approach andrnaccounts also for the mass and momentum transportrnin the porous medium. The discretization schemernwas adapted locally in order to account for therndiscontinuities occurring at the interface.