Experimental investigation on the influence of intake temperature distor-tion on the aerodynamic performance of multi-stage transonic compressor
Intake temperature distortion is one of the critical factors significantly affecting the aerodynamic stability of compressors.An intake electric heating distortion generator was designed,and a four-stage transonic compressor was used as the test subject.Aerodynamic performance tests were conducted under intake temperature distortion at various rotational speeds.The results show that intake temperature distortion causes the characteristic lines of the transonic compressor to shift towards lower flow conditions,with a greater offset at higher speeds.Simultaneously,temperature distortion leads to a significant decrease in pressure ratio and isentropic efficiency,with a maximum decrease in pressure ratio of 4.2% and an isentropic efficiency reduction up to 14.7% .Under high rotating speed conditions,distortion-induced vibrations exceed limits,indicating that uneven thermal loads caused by inlet temperature distortion have a negative impact on the stable and safe operation of the compressor.When the power of the electric heating section is fixed,the intake air mass flow increases with the increase in speed,resulting in a decrease in the temperature difference between the high-temperature and low-temperature regions and a reduction in the intensity of the total temperature distortion of the intake air.
aero-engineintake temperature distortionmulti-stage transonic compressoraerodynamic performanceexperimental studyelectric heating
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