A rocket-based combined cycle engine with variable suction and removal control inlet port

Abstract

The invention discloses a variable-gettering control air inlet passage for a rocket based combined cycle engine. The variable-gettering control air inlet passage comprises a precursor precompression section, an inner compression section and an air inlet passage profile of an isolation section, wherein an area-adjustable gettering region is arranged on the upper surface of the inner compression section of the air inlet passage. Under the constraint that the engine totally gives the air inlet passage profile, according to the structural scheme of variable-gettering control provided by a non-viscous air inlet passage theory, in the premise without adding a complex device, the start mach number of the air inlet passage is lowered. Before the rocket based combined cycle engine a shifted to a ramjet mode, an inner contraction section of the air inlet passage as the gettering region is totally opened. After the rocket based combined cycle engine a shifted to the ramjet mode, the inner contraction section of the air inlet passage as the gettering region is gradually closed. According to the structure of the variable-gettering control air inlet passage, the flow coefficient and other performance parameters under an ejecting mode and the ramjet mode are increased; the working range of the air inlet passage for rocket based combined cycle is widened; meanwhile, the air inlet passage still has a good performance under the supersonic mode.

Description

technical field [0001] The invention relates to the technical field of rocket ramjet engines, in particular to a variable absorption and removal control inlet of a rocket-based combined cycle engine. Background technique [0002] The Rocket-Based-Combined-Cycle (RBCC) engine has potential advantages such as reusability, low cost, and high reliability, and is considered to be one of the propulsion systems most likely to be used in future space-to-ground transportation systems. one. The aircraft with the rocket-based combined cycle engine as the propulsion system can take off from the ground at zero speed, accelerate continuously until it reaches the cruising state during the flight, and the working Mach domain includes the subsonic stage, transonic stage, supersonic stage, and hypersonic stage; In space, the rocket-based combined cycle engine has the ability to continuously work from sea level to outside the atmosphere. According to the working altitude and Mach number of t...

AI Technical Summary

Problems solved by technology

[0004] The variable-structure intake scheme that adjusts the intake lip or compression surface to achieve a wide range of work, although it can broaden the working range of the intake and improve the work of the intake in the ejection mode and sub-combustion mode Performance, but it needs to be supported by a complex mechanical structure, which will bring a series of problems in sealing, realization, and additional structural quality, and the feasibility of the scheme is poor

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