Drag reduction and aero heating prevention of a combined configuration of opposing jet and backward jet for hypersonic vehicles at different angles of attack

Active jet technology has great advantages for heat prevention and drag reduction in hypersonic vehicles and is becoming a hot region of research. In real flight missions, hypersonic vehicles fly at different angles of attack, so it is of strong practical interest to investigate the heat protection and the drag reduction effects of jet technology at different angles of attack. This paper investigates the effect of the combined model of the jet model on the drag reduction and the heat protection performance at the angle of attack from 0°to 15°under the free flow at Mach number 6, using the compressible Reynolds averaged Navier Stokes equation and (SST) k- ω turbulence model. The results indicate that the best drag reduction and heat prevention effect of the model with a combined jet configuration at 0°angle of attack. The drag reduction reached 27.1% and the peak heat flux density was reduced by 38.3%. As the angle of attack increases, the drag reduction and the heat prevention effects of the combined model gradually decrease. However, it still outperforms non-jet configurations.