Main combustion chamber part test piece for simulating radial velocity field of outlet of gas compressor

Abstract

The invention provides a main combustion chamber component test piece for simulating a radial velocity field of an outlet of a gas compressor, and the test piece comprises a main combustion chamber which is provided with a combustion chamber inlet; an outer ring assembly and an inner ring assembly, the inner ring assembly is sleeved in the outer ring assembly, the outer ring assembly and the inner ring assembly are coaxially arranged at an interval, and a simulation channel is formed between the outer ring assembly and the inner ring assembly; and the gas compressor outlet velocity field simulation plate is provided with a plurality of gas inlet simulation holes, the gas compressor outlet velocity field simulation plate is arranged in the simulation channel, and the distance between the gas compressor outlet velocity field simulation plate and the combustion chamber inlet is adjustable. The device has the beneficial effects that the device can be assembled on a combustion chamber part test piece, a gas compressor outlet airflow radial velocity field under the engine condition is simulated at a combustion chamber inlet, and the similarity between the part test condition and the engine condition is improved.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a main combustion chamber component test piece for simulating the radial velocity field at the outlet of a compressor. Background technique [0002] The combustion chamber component test is a common way to verify the performance of the combustion chamber. Compared with the engine or core machine test, the combustion chamber component test does not require the assembly of engine components other than the combustion chamber, such as fans, compressors or high and low pressure turbines, and the test cost is low. The development period is short, and the test risk is small. A large number of measuring points can be arranged to record the performance of the combustion chamber. The traditional method of testing the combustion chamber components is to heat and pressurize the air supplied by the gas source into the combustion chamber. The radial velocity field of the air at the inlet of the dif...

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Problems solved by technology

In the state of the engine, when the air speed is as high as 120m / s~160m / s after being compressed by the compressor, affected by the shape of the compressor blades and the frictional resistance of the flow channel wall, the airflow of the compressor will generate The distribution law is a parabolic shape velocity field with a high center and a low top and bottom. There is a speed difference of about 5% between the airflow in the middle and the top and bottom. The gas flow rate of the channel affects the performance of the combustion chamber outlet temperature field. Therefore, it is very important to accurately simulate this parabolic velocity field on the combustion chamber component test piece to obtain the real performance of the combustion chamber. However, under the component test conditions, Lack of the role of the blades at all levels of the compressor, the radial distribution of the airflow at the inlet of the combustion chamber is a trapezoidal velocity field with low speed at both ends and uniform distribution of velocity in the middle area when it only acts through the annular channel, which is consistent with the parabolic distribution law of the compressor outlet on the engine Considering the test economy, it is very necessary to design a low-cost test piece that can simulate the radial parabolic velocity field at the compressor outlet

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