Study of performance of supersonic axisymmetric mixed-compression multi-inlets under single subcritical condition

• Published in: 2017 8th International Conference on Mechanical and Aerospace Engineering (ICMAE) pp. 244 - 248
• Main Authors: Linjing Ma, Danjie Zhou, Haining Dong, Yuanjing Zhang, Mingkun Wang
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.07.2017
• Subjects: Aerodynamics; Drag; Electric shock; Lips; Missiles; Numerical simulation; Shape; single subcritical; supersonic axisymmetric mixed-compression multi-inlets
• ISBN: 1538633051; 9781538633052
• DOI: 10.1109/ICMAE.2017.8038650

This paper proposes a method to make supersonic axisymmetric mixed-compression multi-inlets get into the single subcritical condition by numerical simulation. The flow mechanism in the inlets and the changing rule of the aerodynamic performance of the missile under this condition have been studied. The results when supersonic inlets get into single subcritical condition are concluded as follows: (1) the backpressure in the inlets is high, the flow velocity is subsonic; (2) the flow flux of the missile reduces and the drag coefficient increases at the same time. About 1% of the loss of the flow flux can result in about 2% of the addition of the zero resistance; (3) the lift coefficient of the missile remains unchanged basically; (4)the value and the slope of the pitching moment coefficient are both increasing, the longitudinal static stability of the missile increases 1.57% maximum; (5) the missile produces a large yaw moment, and the value increases as the angle of attack increases.