论文部分内容阅读
A new idea of drag reduction and thermalprotection for hypersonic vehicles is proposed based on thecombination of a physical spike and lateral jets for shock-reconstruction. The spike recasts the bow shock in front ofa blunt body into a conical shock, and the lateral jets workto protect the spike tip from overheating and to push theconical shock away from the blunt body when a pitchingangle exists during flight. Experiments are conducted in ahypersonic wind tunnel at a nominal Mach number of 6. Itis demonstrated that the shock/shock interaction on the bluntbody is avoided due to injection and the peak pressure atthe reattachment point is reduced by 70% under a 4°attackangle.
A new idea of drag reduction and thermal protection for hypersonic vehicles is proposed based on thecombination of a physical spike and lateral jets for shock-reconstruction. The spike recasts the bow shock in front of a blunt body into a conical shock, and the lateral jets workto protect the spike tip from overheating and to push theconical shock away from the blunt body when a pitchingangle exists during flight. The Experiments are conducted in ahypersonic wind tunnel at a nominal Mach number of 6. Itis demonstrated that the shock / shock interaction on the bluntbody is avoided due to injection and the peak pressure atthe reattachment point is reduced by 70% under a 4 ° attackangle.