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为揭示跨声速多级压气机中非定常压力的脉动频谱结构,基于三维定常Denton程序发展了三维非定常计算程序,对三维跨声速多级压气机近失速点进行了定常与非定常数值模拟,并在此基础上对三个典型径向截面的非定常压力进行了频域分析。结果表明:通过对非定常频域图谱的研究,从一个全新的视角来分析非定常流场,可以看到在时域流场中很难直观看到的出口数值反射等现象;在压气机静子的结构设计中,如果某级静子后续的转子工作在跨声速工况下,则该级静子尾缘处会受到较大的非定常气动力作用;多级压气机中后面级叶排频谱结构较为丰富,通过频率的4倍频振幅分量依然较大,在进行动态压力传感器的选型时需要考虑这点。
In order to reveal the pulsation spectrum structure of unsteady pressure in transonic multi-stage compressors, a three-dimensional unsteady calculation program is developed based on the three-dimensional steady Denton program. The stationary and unsteady numerical simulations of the near-stall points of a three-dimensional transonic multi- On this basis, the unsteady pressure of three typical radial sections is analyzed in frequency domain. The results show that the unsteady flow field can be seen from a new perspective through the study of the unsteady frequency domain atlas, which can be easily seen in the time-domain flow field. In the compressor stator In the structure design, if the rotor of a certain stator follows the transonic condition, the trailing edge of the stator will be affected by the larger unsteady aerodynamic force. The spectrum structure of the rear row of multi-stage compressor is relatively Abundant, 4 times the frequency through the frequency amplitude component is still large, the selection of dynamic pressure sensors need to consider this point.