摘要
An array of subsonic counter-flow jets is studied as an active thermal protection system(TPS)for wing leading edges of hypersonic vehicles.The performance is numerically estimated in the model case of a circular cylinder on the basis of the 2D compressible Navier-Stokes equations.In contrast to a single subsonic jet,an array of jets is robust against variation of the angle of attack;high cooling effectiveness is confirmed up to 5°variation.The coolant gas(air)discharged from channels embedded in the cylinder covers over a wide range of the front surface of the cylinder.The feasibility of the active TPS is also discussed.
