Research on drag reduction and heat prevention performance of spike with the channel concept for hypersonic blunt body

To answer the difficulties of drag reduction and heat protection for hypersonic vehicles, a new type of a spike with a channel entrance at the head and a lateral outlet was devised. When contrasted to a solid spike, once the channel is added, the lateral exhaust pulls the separated shock wave away from the spike, reducing the strength of the reattached shock wave and dramatically enhancing heat resistance. In this study, the affecting features of the new idea model are investigated. The findings show that the larger the half-angle of channel convergence, the better the model's overall drag reduction and heat prevention effectiveness. In the research range, the model with a 60° convergence half angle delivers the best overall advantage in terms of drag reduction and heat prevention. The total resistance of the model was reduced by 14.44 %, and the peak heat flux of the blunt-body wall was reduced by 33.84 % compared to the solid spike.