High-pressure-bearing pre-combustion chamber head shell structure

Abstract

The invention discloses a head shell structure of a high-pressure pre-combustion chamber, which includes a top cover, a second bottom, a fuel collector, a body and a bottom. The head shell of the pre-combustion chamber adopts a spherical structure to improve the body The local working environment of the head improves the overall pressure bearing capacity and structural reliability of the head of the pre-combustion chamber, which is helpful for the structural layout of the fuel collector; The radial through holes are uniformly arranged on the upper part of the fuel tank, so that a part of the fuel directly enters the combustion chamber through the radial through holes, and is mixed with high-temperature gas to improve the uniformity of the temperature field at the outlet of the combustion chamber, and at the same time reduce the spoiler ring, grille and body turning And other structures, effectively reducing the weight of the pre-combustion chamber.

Description

Technical field [0001] The invention relates to a high-pressure pre-combustion chamber head shell structure, which can be used in the field of liquid rocket engines. Background technique [0002] As a key component of the liquid rocket engine, the pre-combustion chamber is used to combust the oxidant and fuel entering the pre-combustion chamber at a certain mixing ratio to produce high-temperature gas to drive the turbo pump. [0003] The existing pre-chamber / gas generator has a small fuel flow rate, and a collector with the same height as the fuel chamber is usually designed outside the fuel chamber. As the thrust of the liquid rocket engine gradually increases, the flow rate and pressure of the pre-chamber will gradually increase. improve. This brings new problems to the structural design of the pre-chamber: an increase in the flow of the pre-chamber will lead to an increase in the diameter of the fuel inlet pipe, which will make it difficult to arrange the pre-chamber fuel coll...

AI Technical Summary

Problems solved by technology

This brings new problems to the structural design of the pre-chamber: an increase in the flow rate of the pre-chamber will lead to an increase in the diameter of the fuel inlet pipe, which makes it difficult to arrange the pre-chamber fuel collector; the increase in the pressure of the pre-chamber requires pre-combustion The chamber head shell has sufficient pressure bearing capacity. According to the conventional design method, the wall thickness of the pre-chamber head shell will be significantly increased, which will lead to the overweight of the pre-chamber

[0004] As the flow rate increases, the uniformity of the temperature at the outlet of the pre-chamber is not easy to ensure

At present, in order to ensure the uniformity of the outlet temperature of the pre-combustion chamber, measures such as spoiler rings or grilles are generally used on the body of the combustion chamber, or measures for turning the body. On the one hand, the structure is more complicated, resulting in an increase in overall weight. On the other hand , the spoiler ring or grille may have ablated failure

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