Combined type spray pipe of solid rocket engine

Abstract

The invention provides a combined type nozzle of a solid rocket engine, and relates to the technical field of solid rocket engines. According to the combined type nozzle of the solid rocket engine,improvement is achieved on the basis of a conventional exhaust nozzle, a single-face expansion nozzle and a Laval nozzle are ingeniously combined, and the advantages of the two nozzles are exerted at the same time. In the combined type nozzle of the solid rocket engine, an asymmetric single-slope expansion nozzle is specifically adopted, the convergent section of the expansion nozzle is fixed and connected with the wall surface of a combustion chamber, and the expansion section is connected with a flexible joint to form a movable part capable of swinging within a certain angle, so that vector thrust within a larger range is generated, and vector control over the solid rocket engine is completed. In order to solve the problem of flow loss generated by the single-slope expansion nozzle, the Laval nozzle is arranged in the single-slope expansion nozzle, gas-state combustion products can be completely expanded and accelerated, and energy conversion is efficiently completed. Through the combination of the two nozzles, vector thrust in a large range can be generated under the condition of small flow loss, and therefore control over the flying direction of the solid rocket engine is improved.

Description

technical field [0001] The invention belongs to the technical field of solid rocket motors, in particular to a combined nozzle of solid rocket motors. Background technique [0002] Solid rocket motor is the abbreviation of solid propellant rocket motor, which is mainly composed of solid propellant charge, nozzle and ignition device of the combustion chamber shell. In the solid rocket motor, the propellant used for combustion is stretched or poured into a charge of the desired shape, which is directly installed in the combustion chamber or the engine casing. Solid rocket motors are used in a variety of aircraft: ballistic missiles, space systems and launch vehicles, cruise missiles and aircraft, surface-to-air and air-launched missile systems. [0003] The solid rocket motor can be used as the main engine of the rocket, or as an auxiliary engine for flight control interstage and head separation, braking and soft landing, spacecraft emergency rescue and pilot's special cabin....

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a combined nozzle of a solid rocket motor to solve the problem that the expansion ratio and vector control of the nozzle at the present stage are difficult to have both

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