吸气式推进系统,是一种适合单级入轨飞行器可重复使用的发动机系统。本文从理论上研究了液化空气型,即使用接近三态点的低温液化空气推进系统。讨论了这种推进系统的性能,并研究了典型系统的循环过程。另外还对开发这种推进系统的一个关健技术——空气冷凝器进行了初步试验,得出了满意的结果。 Aspirated Propulsion System, a reusable engine system for single stage orbiting vehicles. In this paper, the liquefied air type has been studied in theory, that is, the cryogenic liquefied air propulsion system with near three-state points. The performance of this propulsion system is discussed and the cycling of a typical system is studied. In addition, preliminary research on the air condenser, a key technology for developing such propulsion system, was conducted and satisfactory results were obtained.