Variable-structure air inlet channel of rocket-based-combined-cycle engine

Abstract

The invention discloses a variable-structure air inlet channel of a rocket-based-combined-cycle engine. The variable-structure air inlet channel comprises a variable-structure air inlet channel inner compression section, and a bottom plate of the variable-structure air inlet channel inner compression section comprises an inner contraction section bottom plate and a throat section bottom plate which are connected through a second rotating device from front to back; the front end of the air inlet channel inner compression section communicates with an air inlet channel front body section, a bottom plate of the air inlet channel front body section is an air inlet channel front body bottom plate, and the rear end of the air inlet channel front body bottom plate is connected to the front end of the inner contraction section bottom plate through a first rotating device; when the mach number of the free jet is increased, the inner contraction section bottom plate rotates towards a cavity of the air inlet channel inner compression section by taking the first rotating device as a rotating shaft; and meanwhile, the throat section bottom plate takes the second rotating device as a rotating shaft and rotates in the direction far away from the cavity of the air inlet channel inner compression section. According to the variable-structure air inlet channel of the rocket-based-combined-cycle engine, the working performance under the injection and subsonic-combustion modes is effectively improved, and meanwhile, the performance loss of the air inlet channel under the supersonic-combustion mode is not caused.

Description

technical field [0001] The invention belongs to the technical field of a rocket-based combined cycle engine, and in particular relates to a variable-structure intake port 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 RBCC 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 RBCC engine has the ability to continue to work from sea level to outside the atmosphere. According to the working altitude and Mach number of the aircraft, the RBCC engine underg...

AI Technical Summary

Problems solved by technology

However, in the existing RBCC inlet design method, the built-in rocket support plate in the isolation section hinders the passage of incoming flow and easily leads to congestion, which aggravates the contradiction between high-efficiency compression and low-speed starting of the inlet.

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