Effects of Coolants of Double Layer Transpiration Cooling System in the Leading Edge of a Hypersonic Vehicle

As a promising and efficient active cooling method, double layer transpiration is introduced into the design of system in leading edge hypersonic vehicle. The physical model built combined with cooling, film heat conduction, porous media conduction convection transfer. In addition, effects different kinds coolants are considered to reveal mechanisms operation conditions. A comprehensive turbulence validation mesh independence study provided. Flow characteristics caused by flow impingement, separation, transition interaction flows displayed analyzed work. When supplied at same mass rate, low densities, i.e., H 2 He, have lowest peak temperature compared large N CO . densities ejecting velocity which provides kinetic energy penetrate deeply media. when enough, recirculation formed front pushes high region located stagnation away from edge. However, ejected velocity, exhibit better performance.