Solid-liquid rocket engine annular slot plug nozzle

Abstract

The invention discloses a solid-fluid rocket engine annular-seam-type plug nozzle. The solid-fluid rocket engine annular-seam-type plug nozzle comprises a ring laryngeal mask, a nozzle pressing plate, a nozzle shell body, a plug cone and a thermal-insulating plate. The ring laryngeal mask is installed at the outlet end of the nozzle shell body through the nozzle pressing plate, a boss is installed in the nozzle shell body through a ribbed plate, and the plug cone is arranged in the laryngeal part of the ring laryngeal mask in a suspended mode and connected with the boss; and the peripheral surface of the plug cone is matched with the laryngeal part of the ring laryngeal mask to form a convergent section and an expansion section, the thermal-insulating plate is installed at the inlet end of the nozzle shell body, and straight slots communicating with each other are formed in the thermal-insulating plate and the ribbed plate. High-temperature and high-pressure fuel gas in a combustion chamber of a solid-fluid rocket engine enters through the inlet end of the nozzle shell body, the fuel gas gradually accelerates at the convergent section, and after the sound speed is reached at the laryngeal part of the ring laryngeal mask, the fuel gas flows into the expansion section and continuously accelerates to the supersonic speed. The solid-fluid rocket engine annular-seam-type plug nozzle is suitable for the solid-fluid rocket engines with different working heights.

Description

technical field [0001] The invention relates to the field of rocket engines, in particular to a solid-liquid rocket engine annular slot plug nozzle. Background technique [0002] As an integral part of the rocket engine, the nozzle is an important factor affecting the performance of the engine. [0003] The nozzle of the rocket engine is generally a Raval nozzle, which is used to convert the heat energy of the high-temperature and high-pressure gas generated by the combustion in the combustion chamber into kinetic energy. When the high-temperature and high-pressure gas flows through the nozzle, it expands and accelerates continuously, and finally is discharged from the outlet surface of the nozzle at high speed, generating thrust. Most of the nozzles of existing solid or liquid rocket motors are bell-shaped nozzles. [0004] The traditional bell-shaped nozzle, because its expansion ratio cannot adapt to the change of environmental pressure, will cause over-expansion or und...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of solid-liquid rocket engine circular slot type plug nozzle, to solve the structure and form of the existing plug nozzle existing in the prior art, all only for solid or liquid rocket motor, without considering Application on solid-liquid rocket engines, not applicable to technical problems of solid-liquid rocket engines

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