Research on Drag Reduction and Heat Prevention of Supersonic Vehicle with the Composite Configuration of Spike and Lateral Jet

Abstract

A combined spike and lateral jet structure was proposed to address the concerns of drag reduction and heat prevention for supersonic aircraft. The CFD approach was used to numerically simulate the configuration's flow field, and its drag reduction and heat prevention capabilities were evaluated. Flow field characteristics, the influence of lateral jet position, and the affect of lateral jet to incoming pressure ratio are among the topics covered in the study. In comparison to a simple spike setup, the following is the study scope: 1. The combined spike and lateral jet configuration's drag reduction and heat prevention process can be characterized as push away, diminish shock wave drag reduction, and low-temperature gas heat prevention. At 0.7, the best drag reduction impact is found, whereas at 0.5, the poorest heatproof effect is seen. 2. The pressure ratio of lateral jet flow to incoming flow has a positive link with drag reduction and heat prevention performance; 3. To obtain the optimum overall drag reduction and thermal efficiency, the ratio of the distance between the jet and the blunt-body to the length of the spike is 0.7, the pressure ratio between the jet and the incoming flow is 0.8. Compared with the single spike, the thermal efficiency is 93.4%, and the drag reduction efficiency is 68.8%.