Numerical simulation of turbulent boundary layers with foreign gas transpiration using OpenFOAM

摘要

Transpiration cooling in combination with porous high-temperature materials is a promising technique for thermal protection of highly-loaded aerospace applications. In this study, we present a modified OpenFOAM solver which is applied to the simulation of a turbulent channel flow with boundary layer blowing. Different models for porous wall injection of air, argon, and helium into a main flow of air are proposed and evaluated. Subsequently, same and foreign gas transpiration is simulated for cold and heated main flow conditions and the results are compared to experimental data and correlations from literature. A very good overall agreement is found for velocity and temperature boundary layer profiles as well as the dimensionless parameters for wall shear stress and heat transfer.