Self-adaptive pneumatically-adjusted RBCC engine with axisymmetric structure, and aircraft

Abstract

The invention relates to a self-adaptive pneumatically-adjusted RBCC engine with an axisymmetric structure, and an aircraft. The self-adaptive pneumatically-adjusted RBCC engine with the axisymmetric structure comprises an engine body, wherein the engine body is provided with a gas inlet channel, a combustion chamber, an equal-straight section and an exhaust section; an inlet of the combustion chamber is communicated with the gas inlet channel; an outlet of the combustion chamber is communicated with an inlet of the equal-straight section; an outlet of the equal-straight section is communicated with an inlet of the exhaust section; the engine body is further provided with a suction channel; an inlet of the suction channel is formed in the side wall of the gas inlet channel and communicates with the gas inlet channel; an outlet of the suction channel is formed in the side wall of the equal-straight section and communicates with the equal-straight section; and an acute angle is formed between the gas outlet direction of the outlet of the suction channel and the arrangement direction from the equal-straight section to the exhaust section. The self-adaptive pneumatic adjustment RBCC engine with the axisymmetric structure, and the aircraft have the advantage of being good in performance.

Description

technical field [0001] The invention relates to the technical field of aerospace engines, in particular to an RBCC engine and an aircraft with an axisymmetric structure and self-adaptive aerodynamic adjustment. Background technique [0002] The speed range of the engine is an important design index of the engine. A wide speed range means a wider application range of the engine. The larger the flight envelope range, the more practical the engine and the wider the application prospect. RBCC (Rocket-Based Combined Cycle, rocket-based combined cycle propulsion system) engine breaks through the limitations of conventional air-breathing ramjet engines, can work at a wider flight Mach number, and has a wide range of applications. [0003] However, for conventional geometrically non-adjustable RBCC engines, at lower Mach numbers, more air flow is required to ensure the normal start of the engine, which causes a lot of energy waste on the one hand, and affects the engine thrust, and...

AI Technical Summary

Problems solved by technology

[0003] However, for conventional geometrically non-adjustable RBCC engines, at lower Mach numbers, more air flow is required to ensure the normal start of the engine, which causes a lot of energy waste on the one hand, and affects the engine thrust, and brings great overflow resistance

In addition, since there are four working modes inside the RBCC engine, in order to coordinate the work between different modes, higher requirements are put forward for the design of the inner runner, especially when the engine is in different states, the corresponding theoretical throat area is different, but in actual engineering schemes, the throat area of ​​the engine is usually not adjustable, and it is difficult to optimize the engine state

[0004] At present, some researchers have improved the above problems. However, the improved scheme generally still has the problem of low combustion efficiency or small engine thrust, resulting in poor performance of RBCC engines.

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