Optimization method of pressure flow path of cooling jacket in thrust chamber of full flow afterburning cycle engine

Abstract

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 In the optimization method, the pump in the fuel turbine pump is firstly designed as a two-stage cascading type consisting of a primary pump and a secondary pump; then the outlet of the primary pump is divided into two paths, one of which is connected to the thrust chamber expansion section The inlet of the cooling jacket, the other outlet is connected to the inlet of the secondary pump, the outlet of the secondary pump is connected to the inlet of the cooling jacket of the expansion section of the thrust chamber, and the outlet of the cooling jacket of the expansion section of the thrust chamber is led to the lower pressure position of the engine. The outlet of the cooling jacket of the expansion section of the thrust chamber is led to the gas generator; finally, the medium flow rate Q1 entering the cooling jacket of the expansion section of the thrust chamber is set to 20-40% of the total flow Q, and the medium flow rate Q2 of the cooling jacket of the expansion section of the thrust chamber is set to Set to Q‑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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