A variable channel ramjet engine and its design and adjustment method

Abstract

The present invention proposes a variable channel ramjet and its design and adjustment method, which includes an air inlet, a combustion chamber and a nozzle. A fixed partition is installed in the combustion chamber to separate the combustion chamber flow channel into a common channel and a Two runners, the end of the fixed partition close to the air inlet is installed with an adjustable partition, the adjustable partition can be rotated, and the change of the engine flow path can be realized by adjusting the position of the adjustable partition. In the present invention, by installing a fixed partition in the combustion chamber and adjusting the adjustable partition connected to it, the flow channel of the engine can be adjusted, and the inlet throat can be adjusted at the same time without setting the nozzle adjustable device. and combustion chamber thermal throat effects.

Description

technical field [0001] The invention relates to a variable channel ramjet engine and a design and adjustment method, belonging to the technical field of ramjet engines. Background technique [0002] Ramjet engines work at different flight Mach numbers, and the corresponding optimal flow paths are different. If the fixed geometry flow path ramjet engine has too large a working Mach number, the performance of the engine will decrease sharply, and if the working Mach number is too small, the engine will face huge overflow and damage. There is no risk of starting, and the Mach number range suitable for work is narrow. The most fundamental way to widen the Mach number range of the ramjet engine and improve the engine performance is to realize the adjustable flow path of the engine, so that the flow path can be well matched with the incoming flow conditions when the engine works at different flight Mach numbers. It is almost impossible to realize the complete flexibility and adju...

AI Technical Summary

Problems solved by technology

The adjustable nozzle throat technology achieves a better working match between the combustion chamber and the intake port through the adjustment of the size of the nozzle throat area. However, as the working Mach number of the ramjet engine increases, the engine combustion chamber needs to be cooled by oil, and the nozzle throat can be adjusted, which makes the thermal protection and sealing of the engine very difficult, and it is difficult to realize the structure

The nozzle outlet area adjustable technology needs to be adjusted in a large space. Due to the limitation of the aircraft or engine structure size, and its own limited improvement on engine performance, it is generally not used in engineering.

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