A Reverse Multi-Nozzle Solid Rocket Motor

Abstract

The invention discloses a reverse multi-nozzle solid rocket motor, which is composed of an ignition pressure screw, an ignition seat, a medicine retaining plate, a front head, a rear end cover, a nozzle and a combustion chamber shell. The front head, the rear end cover and the two ends of the combustion chamber shell are connected by threads; the medicine baffle is located in the cavity formed by the front head and the combustion chamber shell; the ignition seat is connected with the front head and forms a cavity with the medicine baffle. cavity, the igniter cartridge is placed in the cavity. The ignition pressure screw is threadedly connected with the ignition seat. The propellant is placed in the combustion chamber and is fixed by the drug baffle and the step of the rear end cover. The rear end cover is a hemispherical cavity, and there are four screw holes communicating with the combustion chamber on the hemispherical plane, and the four reverse nozzles are connected with the rear end cover through threads; the hemispherical cavity guides the airflow The function reduces the scour of the gas to the rear end cover and improves the reusability of the engine. The throat of the nozzle is adjustable and easy to replace, which can be applied to different conditions of use and reduces the cost of engine replacement.

Description

technical field [0001] The invention relates to the technical field of solid rocket motor testing, in particular to a solid rocket motor with multiple reverse nozzles. Background technique [0002] In the literature "Numerical Simulation and Experimental Research on Flow Field of Oblique Cutting Nozzle of Small Solid Rocket Motor" ("Electronic Test" 2014, Issue 3, pages 9-11), an integrated small solid rocket motor device is proposed, including an igniter, a large combustion Chamber, small combustion chamber, powder column, nozzle, drug baffle and shell. The igniter and the large combustion chamber are connected by threads, and a small combustion chamber is obtained by setting a step inside the large combustion chamber. The step can also fix the charge. Arrangement, the powder column is divided into an inner ring and an outer ring charge, and the length of the inner ring charge is longer than the outer ring charge, and the charge column is fixed by a drug baffle and steps. ...

AI Technical Summary

Problems solved by technology

[0005] 1. The nozzle of the combustion chamber is obtained by punching holes and cannot be disassembled. If the throat of the nozzle is unreasonably designed, the mass flow rate of the nozzle exceeds the gas generation amount or the gas generation amount is lower than the mass flow rate of the nozzle, which will cause the engine to It cannot work stably. If you want to achieve stability, you need to replace the entire engine. The cost is high, and the applicable conditions of the engine are single

[0006] 2. In order to fix the drug column, the wall of the drug retaining plate is set in a flat shape, and the gas flow generated directly rushes to the wall of the shell, which will cause serious ablation and reduce the effect of the gas, and the shell is seriously damaged, which greatly reduces Engine reusability

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