Study on the Drag Reduction Characteristics of Opposing Jet on Hypersonic Lifting Body Configuration
During hypersonic flight,aircraft often face significant drag,which severely limits their flight performance and increases the thermal load and material stress on the aircraft surface.To address this issue,the effects of the number,location,and angle of attack of jet orifices on the lift-to-drag performance of the lifting body are systematically analyzed through numerical simulations.The results indicate that an increased number of jet holes leads to a significant improvement in overall drag reduction,effectively reducing the high-pressure region at the head of the lifting body.However,it also induces instability in the surrounding flow field.The position of the jet hole plays a crucial role in determining the shock wave detachment distance and boundary layer thickness.Moreover,an increase in the angle of attack causes a decrease in overall drag reduction while having minimal impact on local drag reduction,resulting in an increased pressure difference between the upper and lower surfaces.Furthermore,comparative analysis reveals consistent trends in the effects of these three factors on drag reduction performance under high-altitude conditions at 20 km and 55 km.The research findings provide valuable insights for the design of efficient drag reduction schemes.
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