组合循环动力在水平起降天地往返飞行器上的应用

 水平起降天地往返飞行器是未来空间快速响应和低成本航天运输的重要方式，组合循环动力具备全包线飞行能力，在大气层内利用空气作为氧化剂，可大大提升发动机的比冲，是未来水平起降天地往返飞行器的首选动力系统。梳理了国内外组合动力天地往返飞行器的发展历史和现状，对比未来航天运输系统中不同起降方式的优缺点，明确了水平起降的优势及其对飞行器和发动机的要求，通过组合动力和火箭动力的总体性能分析和对比，进一步确认组合循环动力在水平起降天地往返飞行器中的应用优势。

Application analysis of combined cycle engine in horizontal take-off and landing aerospace vehicles

The horizontal take-off and horizontal landing (HTHL) aerospace vehicle is an important means for future space rapid response and low-cost space transportation. Combined cycle power has full envelope flight capability, and uses air as an oxidant in the atmosphere to greatly enhance the specific impulse of the engine. Therefore, it is the preferred engine system for future HTHL aerospace vehicle. This paper reviews the development history and status of the combined cycle powered aerospace vehicles at home and abroad, and describes the advantages and disadvantages of various types of takeoff and landing. The advantages of HTHL and the requirements for the vehicle and engine are clarified. By comparison of RBCC and rocket for aerospace vehicle, the application advantage of combined cycle engine in HTHL aerospace vehicle is confirmed.