Composite mechanism full flow circulation supersonic velocity propulsion system and working method thereof

Abstract

The invention discloses a composite mechanism full flow circulation supersonic velocity propulsion system and a working method thereof. The system comprises an air admission passage, an air compressor, a diffusion duct, a shaft, an open type pre-burning driver, a closed type pre-burning driver, a turbine, an afterburning thruster and a jet nozzle; the air admission passage, the air compressor, theshaft, the turbine, the afterburning thruster and the jet nozzle are sequentially connected; the air compressor is connected with the turbine through the shaft; the turbine is positioned on the air inlet side of the afterburning thruster; the jet nozzle communicates with the outlet of the afterburning thruster; the open type pre-burning driver and the closed type pre-burning driver are positionedbehind the air compressor, and outlets directly face the turbine; and the open type pre-burning driver and the closed type pre-burning driver are alternately distributed in the diffusion duct in an annular space on the outer side of the shaft. The system gives play to propulsion advantages of all subsystems in the aspects of specific impulse and thrust-weight ratio as much as possible, so that asupersonic velocity combined propulsion system which is rapidly started by self, has multiple degrees of freedom and composite working mechanism and is efficient and economic is realized.

Description

【Technical field】 [0001] The invention relates to the technical field of supersonic propulsion, in particular to a composite mechanism full flow circulation supersonic propulsion system and a working method thereof. 【Background technique】 [0002] In recent years, with the advancement of science and technology and the traction of military needs, the near space has gradually attracted the attention of various countries because of its potential military and civilian value, and various countries have carried out a series of research on the near space. The propulsion system of a near-space vehicle not only requires the ability to freely enter the adjacent space, but also requires the ability to cruise at high altitude and high speed. At the same time, the propulsion system of a near-space vehicle should have high performance, light weight, high reliability, low cost, long range, and boost-free , Reusable, adaptable to a wide range of speed and so on. [0003] Existing propulsio...

AI Technical Summary

Problems solved by technology

However, the combined engines currently under development, no matter TBCC or RBCC engines, have the problem of discontinuous thrust during the working mode conversion process of different cycles; moreover, the structure of the mode conversion device is relatively complicated, which leads to the failure of the combined engine. Increased weight, which brings many disadvantages such as reduced payload and increased fuel consumption of the aircraft

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