Fuel gas guide device for vertical type test run of small solid rocket engine

Abstract

The invention provides a fuel gas guide device for vertical type test run of a small solid rocket engine. The fuel gas guide device is composed of a guide body and a support; the support is formed by assembling and welding steel plates located on the outer side of the guide body; a steel wire reinforced net is welded inside the support; the guide body is formed by pouring cement resistant to high temperature into the support; a section curve of the guide surface, facing a jet nozzle of the solid rocket engine, of the guide body is composed of an arc line section and a straight line section in a vertical plane, and the straight line section is a tangent line at the tail end of the lower part of the arc line section; upward protrusion edges are arranged on the two sides of the guide surface of the guide body. Through the guide body with the guide surface, gas flow of the jet nozzle of the small solid rocket engine is guided and is led out in the horizontal direction instead of the vertical direction, and therefore facilities and equipment of test beds are protected against ablation caused by high-temperature fuel gas, and the fuel gas and combustion residues are prevented from vertically bouncing and influencing the engine.

Description

technical field [0001] The invention relates to the technical field of solid rocket motor testing, and relates to a gas guide device for a solid rocket motor vertical test run, in particular to a small-sized solid rocket motor vertical test run gas deflector. Background technique [0002] When the solid rocket motor is tested vertically, the high-temperature, high-speed gas flow from the nozzle is perpendicular to the ground. At present, the solid rocket motor upright test bench body used in China is made of steel plate in order to meet the needs of installing test racks and other tooling. body damage. In order to prevent the high-temperature gas from damaging the platform facilities and equipment, and to avoid the impact of the gas and combustion residue on the engine after hitting the ground, the engine gas must be guided from the vertical direction to the horizontal direction. [0003] According to the existing data, there is no special gas diversion method and facility...

AI Technical Summary

Problems solved by technology

[0003] According to the existing data, there is no special gas diversion method and facility for the upright and vertical test run of solid rocket motors in China. When building a special large-scale solid motor test bench in foreign countries, the method of "steel vertical diversion tank + cooling water pool" is adopted. , but this method brings pollution to the water environment, and the steel diversion tank is easy to rust, requiring frequent renovation

In addition, solid engine gas belongs to gas-solid two-phase flow, which is different from the gas-phase gas flow of liquid rocket engine, which has a strong scouring effect on the contact surface of the guide body, and the vertical test diversion method of liquid rocket engine cannot be used

Images