Ramjet with variable flow channel and design and adjustment method

Abstract

The invention provides a ramjet with a variable flow channel and a design and adjustment method. The ramjet with the variable flow channel comprises an air inlet channel, a combustion chamber and a spray pipe. A fixed partition plate is installed in the combustion chamber and divides a flow channel of the combustion chamber into a shared flow channel and a second flow channel. An adjustable partition plate is installed at the end, close to the air inlet channel, of the fixed partition plate and can rotate. The flow channel of the ramjet can be changed by adjusting the position of the adjustable partition plate. According to the ramjet with the variable flow channel and the design and adjustment method, the fixed partition plate is installed in the combustion chamber, the flow channel of the ramjet can be adjusted by adjusting the adjustable partition plate connected with the fixed partition plate, and the effect of adjusting an air inlet channel throat and a combustion chamber heat throat simultaneously can be achieved without arrangement of a spray pipe adjustable device.

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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