Test and analysis of the influence of inlet flow field distortion on the characteristics of low-pressure compressors Although an engine of a certain type of equipment is imitation, the ability and characteristics of its resistance to import distortion are not clear, and the compatibility of the inlet engine is to be studied. It is also necessary to obtain information on the effects of inlet flow field distortion on engine stability.
After the pressure distortion of the inlet passes through the low-pressure compressor, the distortion level is generally attenuated, so the high-pressure compressor is faced with a lower level of pressure distortion. The circumferential distortion index of the inlet is larger than that of the inlet, and the compatibility analysis of the inlet engine is conservative, so the circumferential distortion index remains å¯. The experimental results of the angular flapping boundary and the equivalent rotational speed of the flow zone are shown together with the general characteristics of the quasi-uniform flow inlet state. It can be seen from the figure that the intake distortion has a significant effect on the surge boundary and the iso-speed line. The larger the intake distortion, the more the surge boundary shifts to the right, and the lower the surge margin. When the cloud is over, the surge margin is running out. In addition, different distortion segments have different effects on the surge margin. Among them, the distortion margin is the most lost.
In addition, under various distortion indexes, at 5 o'clock, the surge margin loss is the smallest, and the remaining speed is relatively larger, which indicates that the low-pressure compressor has strong anti-distortion ability at the design speed. The circumferential distortion index of the inlet is larger than that of the inlet, and the compatibility analysis of the inlet engine is conservative. Therefore, the test results show that the selection of the low pressure compressor as the main component of the compatibility study is of.
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