Full-flow afterburning cycle engine thrust chamber cooling jacket pressure-bearing flow path optimizing method

Abstract

The invention provides a full-flow afterburning cycle engine thrust chamber cooling jacket pressure-bearing flow path optimizing method, and aims to solve the technical problem that high pressure bearing and heat exchange requirements of a cooling jacket cannot be met due to high pressure of a thrust chamber of a full-flow afterburning cycle engine. The method comprises the following steps that firstly, a pump in a fuel turbine pump is designed into a two-stage cascade type consisting of a first-stage pump and a second-stage pump; then an outlet of the first-stage pump is divided into two paths, one path of outlet is connected with an inlet of the thrust chamber contraction and expansion section cooling jacket, the other path of outlet is connected with an inlet of the second-stage pump, an outlet of the second-stage pump is connected with an inlet of a thrust chamber expansion section cooling jacket, an outlet of the thrust chamber contraction and expansion section cooling jacket is led to a position with lower pressure of the engine, and an outlet of the thrust chamber expansion section cooling jacket is led to a fuel gas generator; and finally, a flow Q1 of a medium entering the thrust chamber contraction and expansion section cooling jacket is set to be 20% to 40% of a total flow Q, and a flow Q2 of a medium entering the thrust chamber expansion section cooling jacket is set to be Q to Q1.

Description

technical field [0001] The invention relates to a method for optimizing a pressurized flow path of a cooling jacket in a thrust chamber of a full-flow supplementary combustion cycle engine. Background technique [0002] The full flow afterburning cycle engine has two sets of gas generators and turbo pumps, which can make the engine have higher thrust chamber pressure and performance. The higher thrust chamber pressure brings greater heat exchange requirements and higher cooling jacket pressure. For the full-flow post-combustion cycle engine, the current solution is that the media in the converging and expanding sections are drawn from the high-pressure source at the same location. In this solution, almost all fuels can be burned by the gas generator, and then drive the turbine to do work. Therefore The temperature of the generator can be lower, but this scheme has higher pressure bearing requirements for the cooling jacket of the converging section and the cooling jacket of...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the high pressure of the cooling jacket caused by the high pressure of the thrust chamber of the full-flow afterburning cycle engine and the heat exchange requirements cannot be met, the present invention provides a pressure-bearing flow path for the cooling jacket of the thrust chamber of the full-flow afterburning cycle engine Optimization

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