Volume 29 Issue 2
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ZHU Jian-feng, HUANG Guo-ping, FU Xin, FU Yong. Preliminary experiment of suppressing flow separation in cascade by micro pulsed jet without external device[J]. Journal of Aerospace Power, 2014, 29(2): 391-397. doi: 10.13224/j.cnki.jasp.2014.02.019
Citation: ZHU Jian-feng, HUANG Guo-ping, FU Xin, FU Yong. Preliminary experiment of suppressing flow separation in cascade by micro pulsed jet without external device[J]. Journal of Aerospace Power, 2014, 29(2): 391-397. doi: 10.13224/j.cnki.jasp.2014.02.019
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Preliminary experiment of suppressing flow separation in cascade by micro pulsed jet without external device

doi: 10.13224/j.cnki.jasp.2014.02.019

  • Jiangsu Province Key Laboratory of Aerospace Power Systems, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • Received Date: 2013-07-17
  • Publish Date: 2014-02-28
    Abstract
  • Based on a micro pulsed jet without external device control technology suitable for high-load compressor, experimental investigation at low Mach number state was carried out on the cascade tunnel, and the steady and dynamic pressure characteristics in no-control state were obtained. The characteristic frequency of the separated vortex was found to be about 478Hz, and the corresponding Strouhal number was about 0.2. The experiment of controlling separation flow by micro pulsed jet was performed, with the frequency of the micro pulsed jet from 148Hz to 840Hz. Results show that when the frequency of the micro pulsed jet ranges from 0.85 to 1.20 of characteristic frequency of the separated vortex, the control effect is more obvious. Compared with blade slot treatment in other steady control methods, the suction mass flow ratio of this micro pulsed control method is few, and the influence of suction phenomena on the flow characteristics of pressure side and overall performance has been decreased significantly.

     

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