Large adjustment ratio type solid rocket ramjet gas flow adjustment device

Abstract

The invention discloses a large-regulation-ratio type fuel gas flow regulation device for a solid rocket ramjet. A jet nozzle (combined jet nozzle) of the flow regulation device is composed of a jet nozzle with a fixed throat area and a jet nozzle with a variable throat area; and the whole regulation device is located at the outer part of a combustion chamber. A motor is located on a ramjet end cap; and the motor is connected with a transmission shaft through a shaft coupler. The transmission shaft is connected with a cone valve through a thread; and the cone valve can move frontward and backward through adopting thread driving. By connecting two different jet nozzles through a communicating pipe, an adjustable fuel gas flow is generated. The large-regulation-ratio type fuel gas flow regulation device for the solid rocket ramjet has a simple structure and has the advantages of simple structure, accuracy in controlling, reliability in working, relatively low cost and good implementability.

Description

technical field [0001] The invention belongs to the technical field of gas flow adjustment for solid rocket ramjet engines, in particular to an electric cone valve type solid rocket ramjet gas flow adjustment device. Background technique [0002] The solid rocket ramjet has the advantages of both ramjet and rocket engines, and has the advantages of high specific impulse, small size, light weight, compact structure, reliable operation, and low cost. In order to ensure that the engine has the best working performance and good thrust adjustment capability, the gas flow of the solid rocket ramjet should be adjusted. At present, there are four main schemes for gas flow regulation: fixed flow type, choke type, non-choke type and swirl valve type. Flow regulating valves usually adopt a variety of configurations, such as plunger spool valve, rotary cam valve, rotary slide disc valve, and cone valve. The transmission mechanisms used in traditional control systems generally include ...

AI Technical Summary

Problems solved by technology

Although the structure is simple and the response speed is fast, it needs to add a gas source device, which occupies a large space. Since the gas is prone to leakage, it is not easy to achieve precise control in the process of adjusting the gas flow.

Wang Yilin of Northwestern Polytechnical University proposed a non-coaxial needle-valve gas flow regulation system with a 90-degree angle between the nozzle and the combustion chamber. Although the throat plug rod is easy to seal and thermal protection is easy to achieve, the experimental system is large and cannot achieve precise control.

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