超燃冲压发动机进气道特性及传感器选择研究

摘要

According to the demand of the condition monitoring system of scramjet inlets ,2-D flow field of the scramjet inlets is numerically simulated ;the numerical simulation results of the scramjet inlets at different Mach number and different pressure are presented .The surface static pressure distributions of the inlets from start to un-start are analyzed and the start judgment criterion is given .After inlet monitoring parameters are deter-mined ,extension theory is applied to the sensor selection ,thus a comprehensive evaluation method of scramjet sensor selection is established .Then an example of pressure sensor using this optimal selection method is taken to verify the effectiveness of this method .The research provides reference for the establishment of the scramjet parameters measurement scheme and the design of condition monitoring system .%针对超燃冲压发动机进气道状态监测系统的需求，通过对超燃冲压发动机进气道进行二维流场数值模拟，得到了超燃冲压发动机进气道在不同马赫数、不同反压下的数值模拟结果，进而通过分析进气道从起动状态到不起动状态下的壁面静压分布特性，给出了进气道起动状态的初步判断准则。在确定了进气道监测参数的基础上，将可拓学理论用于超燃冲压发动机传感器选型中，建立了超燃冲压发动机传感器选型的综合评价方法，并以压力传感器选型算例验证了该方法的可靠性。该研究为超燃冲压发动机参数测量方案制定和状态监测系统设计提供参考。