Numerical study of lateral jet interaction at high altitude

In this paper, a numerical simulation method based on components mixed model is used to simulate lateral jet flow in high-altitude and low-density environment. Investigations of the lateral jet interaction are carried out on a missile shape. By studying the effects of nozzle outlet pressure, flying altitude, and angle of attack on jet interaction, the characteristics of the flow structure and jet interaction amplification factor are obtained. The results of the studies indicate that the jet interaction is sensitive to nozzle outlet pressure and angle of attack. The flow separation area near the wall decreases first and then increases with the increase of outlet pressure, while the jet interaction area away from the wall continue to grow. The increase of angle of attack leads to the forward leeward jet interaction area. With the increase of outlet pressure, the impact of the angle of attack becomes weak. The results have a good reference value for the design and analysis of the jet control system.