Internal spiral injection type solid-liquid engine grain

Abstract

The invention belongs to the technical field of solid-liquid rocket engines, and aims to provide an internal spiral injection type solid-liquid engine grain aiming at the technical problem of non-uniform retreating of a burning surface in the length direction of a grain in the prior art. The grain comprises a metal framework body, and the metal framework body is of a hollow structure; and a plurality of sets of evenly-arranged hollow spiral structure blades are arranged in the metal framework body, a fuel medium is nested between every two adjacent sets of hollow blades, an air inlet pipe is arranged at the end of the metal framework body, and an oxidizing agent is evenly injected from the hollow blades in a spiral shape after passing through the air inlet pipe. The technical breakthrough that the oxidizing agent is evenly and spirally injected in the solid-liquid engine grain is achieved, meanwhile, the characteristic of rapid heat transfer of the metal blades is matched, the retreating speed of the fuel medium is effectively increased, meanwhile, uniform retreating of an internal burning face of a fuel channel is achieved, and therefore the engine power accurate adjusting difficulty is lowered; and the mechanical performance of the grain is greatly improved through the framework body made of the metal material, namely the working safety of an engine is improved.

Description

technical field [0001] The invention belongs to the technical field of solid-liquid rocket engines, and in particular relates to an internal spiral injection type solid-liquid engine grain. Background technique [0002] The solid-liquid rocket engine uses a combination of solid and liquid propellants. Generally, it uses a combination of solid fuel and liquid oxidizer. It has many advantages of both liquid rocket engines and solid rocket engines, such as simple structure and good safety. , adjustable thrust, green and environmental protection, etc. [0003] The combustion reaction in the solid-liquid rocket engine combustion chamber is a typical diffusion combustion, and the combustion process occurs in the boundary layer far away from the fuel surface and runs through the entire fuel channel. The retreat rate is a key index for evaluating the performance of solid-liquid engines, which describes the amount of retreat of the combustion surface per unit time, that is, the mass...

AI Technical Summary

Problems solved by technology

[0004] In view of the technical problem in the prior art that the burning surface recedes unevenly along the grain length direction, the purpose of the present invention is to provide an internal spiral injection solid-liquid engine grain

Images