A segmental test piece structure of hyperbaric chamber type main combustion chamber

Abstract

The invention provides a sectoral test piece structure of a hyperbaric chamber type main combustion chamber. The load-bearing casing is cylindrical, and the test section is placed in the load-bearing casing. The test section includes a fan-shaped flame cylinder and a fan-shaped casing; Under the structure of the present invention, the mechanical load and test pressure in the test process are independently borne by the load-bearing casing, and the main body of the test section composed of the fan-shaped casing and the fan-shaped flame cylinder only undertakes the function of forming the flow channel and is not affected by external loads. Improve the life of the test piece and the safety of the test. The load-bearing casing and the supporting flange have a certain degree of versatility and can accommodate multiple project sector test pieces. Reduce processing costs and shorten the development cycle.

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 of the flame tube and the casing of the combustion chamber, causing some airflow in the two channels to enter the side cavity (combustion chamber) during the test. chamber casing and the cavity on the side wall of the flame tube), thus affecting the flow distribution of the test piece and reducing the test accuracy;

[0006] c) Due to the differences in engine characteristics, aerodynamic parameters, and structural dimensions of different projects, each project designs a sector-shaped test piece according to its own needs, which is not universal and greatly increases the development cost and cycle

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