A rbcc engine and aircraft with self-adaptive aerodynamic regulation of axisymmetric structure

Abstract

The invention relates to an RBCC engine and an aircraft with self-adaptive aerodynamic regulation of an axisymmetric structure. The RBCC engine with self-adaptive aerodynamic adjustment of axisymmetric structure includes an engine main body, the engine main body is provided with an air inlet, a combustion chamber, a straight section and an exhaust section, the inlet of the combustion chamber communicates with the air inlet, The outlet of the combustion chamber communicates with the inlet of the straight section, and the outlet of the straight section communicates with the inlet of the exhaust section; wherein, the engine body is also provided with a suction passage, and the suction The inlet of the channel is opened on the side wall of the air inlet channel and communicates with the air inlet channel, and the outlet of the suction channel is opened on the side wall of the equal straight section and communicated with the equal straight section, And the air outlet direction of the outlet of the suction channel is set at an acute angle with the arrangement direction from the isostraight section to the exhaust section. The RBCC engine and aircraft with self-adaptive aerodynamic adjustment of axisymmetric structure have better 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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