以RBCC为动力的巡航飞行器有效载荷质量敏感性分析

基于飞行轨迹及质量分析数学模型,对以RBCC为动力的巡航飞行器有效载荷的敏感性进行了分析,主要考虑了发动机比冲、发射马赫数、发射高度、模态转换点(转换马赫数)及惰性质量系数等对有效载荷质量的影响。分析结果表明,提高发射马赫数和发射高度、增加发动机比冲、降低模态转换马赫数及飞行器惰性质量系数有利于提高巡航飞行器的有效载荷质量。其中有效载荷质量对惰性质量系数最敏感,当惰性质量系数分别减小7.3%和增大7.3%时,有效载荷质量的增大量和减小量将分别达到58%和103.7%。

Sensitivity analysis on payload mass of RBCC-powered cruise vehicle

Based on mathematic models of flight trajectory and mass analysis,payload mass sensitivity of RBCC-powered cruise vehicle was analyzed.The effects of specific impulse,launch Mach number,launch height,modal transition Mach number and inert mass coefficient of motor were taken into account principally.The analysis results show that the increase of specific impulse,launch Mach number and launch height,as well as the decrease of modal transition Mach number and inert mass coefficient are favourable for improving payload mass of cruise vehicle,moreover payload mass is the most sensitive to inert mass coefficient.When inert mass coefficient is decreased by 7.3% or increased by 7.3%,payload mass is increased by 58% or decreased by 103.7% respectively.