Fan-shaped test piece structure of high-pressure cabin type main combustion chamber

Abstract

The invention provides a fan-shaped test piece structure of a high-pressure cabin type main combustion chamber. A force bearing casing is cylindrical, a test section is arranged in the force bearing casing, and the test section comprises a fan-shaped flame tube and a fan-shaped casing; under the structure of the invention, the mechanical load and the test pressure in the test process are independently borne by the force bearing casing; a test section main body consisting of the fan-shaped casing and the fan-shaped flame tube only has the function of forming a flow channel and is not affected by the external load, the service life can be effectively prolonged, and the test safety of the test piece can be effectively improved;; the bearing casing and the supporting flange have certain universality and can contain a plurality of project fan-shaped test pieces, the test pieces are simple and reliable in structural form, good in manufacturability and convenient to assemble and disassemble,the machining cost can be remarkably saved, and the development period can be shortened.

Description

technical field [0001] The invention relates to the field of aero-engines, and is a sectoral test piece structure of a high-pressure chamber type main combustion chamber, and is also applicable to other high-temperature and high-pressure sectoral test piece designs. Background technique [0002] With the continuous development of advanced aviation technology, higher requirements are put forward for the high temperature ratio, high pressure ratio, high thrust-to-weight ratio and low fuel consumption of aero-engines. As one of the three core components of the engine, the main combustion chamber must have a higher combustion efficiency. Efficiency, lighter weight and longer life. In the process of engine development, the existing calculation and simulation methods have certain limitations, and cannot accurately simulate the working state and performance of the engine, which needs to be verified through a large number of tests. At present, due to the limitation of the test equi...

AI Technical Summary

Problems solved by technology

[0004] a) Combustion chamber casing with increased wall thickness compared with the real part is used as the load-bearing part. Its fan-shaped welded structure has weak ability to withstand high temperature and high pressure and transmit equipment load, and it is difficult to meet the strength design requirements, thus affecting the test safety and the test piece life;

[0005] b) The casing of the combustion chamber and the flame tube are assembled structures. In order to facilitate assembly and prevent thermal deformation from being uncoordinated, there is a gap between the side wall and edge o

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