以RBCC为动力的巡航飞行器轨迹与质量分析

巡航飞行器正向着远程、高超声速巡航、高弹道的方向发展,RBCC(火箭基组合循环)推进系统是此类巡航飞行器的潜在动力。文中建立了以RBCC为动力的巡航飞行器的飞行轨迹和质量分析数学模型,并针对特定技术参数要求的巡航飞行器进行了求解,考虑了飞行动压和过载的限制。结果表明,当惰性质量系数有效地控制在一定范围之内时,RBCC发动机作为巡航飞行器推进系统是可行的,且飞行器具有良好的总体性能,同时有效载荷会随着惰性质量系数的减小而增加。

Trajectory and Mass Analysis of RBCC-Powered Cruise Vehicles

Rocket-based combined cycle(RBCC) systems,which combine the strong points of airbreathing propulsion and rocket propulsion,provide potential power for cruise vehicles that can fly with hypersonic speed and high trajectory.In the full paper,we explain in detail the trajectory and inert mass of the vehicles on the basis of their feasibility study.In this abstract,we just add some pertinent remarks to the following two topics of explanation: under topic 1,we established their mathematical models for trajectory analysis and mass analysis respectively(see eqs.1 through 5 and 10 through 15 in the full paper);under topic 2,we calculated and analyzed the solutions for the cruise vehicles that require special technical parameters,and in doing so,we considered the restrictions of dynamic pressure and overload(see Figs.1 through 5 in the full paper).Given that lift-off Mach number is 0.7,lift-off mass is 1 500 kg,cruise Mach number is 6.0,cruise height is 25 km,range is over 1 500 km,and the inert mass coefficient is controlled within 0.6,the propulsion system of RBCC-powered cruise vehicle is feasible and the vehicles have satisfactory performance;and when inert mass coefficient is 0.55,the payload mass is 152 kg and increases as the inert mass coefficient decreases(see Table 1 and Fig.6 in the full paper).