Novel pre-cooling air combined engine

Abstract

The invention provides a novel pre-cooling air combined engine. The engine comprises an air combustion path (1), a helium cooling path (2), and a hydrogen energy supply path (3); and the ultralow temperature characteristic of the liquid hydrogen fuel is utilized to cool the high-temperature incoming flow air after being stagnated through an air inlet channel, the helium cooling path (2) is introduced to be used as an intermediate circulation to carry out energy transfer and conversion between the hydrogen energy supply path (3) and the air combustion path (1), and thus the fuel required by cooling and the fuel combustion rate are reduced; and meanwhile, the concurrent heating power of a heater is reduced. The engine has the characteristics that the flight envelope is large, the mode conversion is simple and convenient, the air pre-cooling efficiency is high, and the system specific impulse is high; and the engine can be used as one stage of a horizontal take-off and landing repeatabletwo-stage to-orbit vehicle and as a power system of near-air hypersonic velocity launching platform.

Description

technical field [0001] The invention relates to a novel precooling air combined engine, which belongs to the design field of precooling air combined engines. Background technique [0002] With the increasing frequency of space launch activities, the requirements for repeatable and low-cost space vehicles are becoming more and more urgent. At the same time, the strategic position of hypersonic vehicles in near space has gradually been paid attention to. In this context, the pre-cooled air-type combined power system that introduces a closed helium cycle as an intermediate medium has become one of the research hotspots in the field of hypersonics at home and abroad because of its advantages such as large working envelope, simple mode conversion, and high degree of component sharing. one. At present, the hot topic of this type of engine in the world is the SABER scheme proposed by the British REL company. This scheme includes two working modes: air-breathing mode and pure rocke...

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Problems solved by technology

[0003] The technical problem solved by the invention is: aiming at the problems in the current prior art that the fuel consumption rate of the engine pre-cooling technology is too high, the specific impulse performance of the system is low, and it is difficult to realize the high performance of the system, a new type of pre-cooling air combined engine is proposed

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