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Volume 40 Issue 6
Jun.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(6): 797-802.
Wang Zhuoqi, Lu Lipeng, Yuan Wei, et al. Experimental investigation on critical stall stage of counter-rotating fan at different speed ratio[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(6): 797-802. doi: 10.13700/j.bh.1001-5965.2013.0425(in Chinese)
Citation: Wang Zhuoqi, Lu Lipeng, Yuan Wei, et al. Experimental investigation on critical stall stage of counter-rotating fan at different speed ratio[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(6): 797-802. doi: 10.13700/j.bh.1001-5965.2013.0425(in Chinese)
shu

Experimental investigation on critical stall stage of counter-rotating fan at different speed ratio

doi: 10.13700/j.bh.1001-5965.2013.0425

  • 1. Research Institute of Unmanned Aerial Vehicle, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;

  • 2. National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 06 Nov 2013
  • Publish Date: 20 Jun 2014
    Abstract
  • Theoretical analysis on a low-speed counter-rotating fan shows that the critical stall stage is determined by two parameters, one is the critical stall mass flow coefficient of each rotor, the other is the real mass flow coefficient of the two rotors at stall point. An experiment was taken to confirm this supposition. The experiment was carried out on investigating the stall characteristic of a counter-rotating fan at different speed ratio. 36 cases was taken at 100%, 90%, 80%,70%,60%, 50% speed of each rotor. The result shows that the second rotor is the critical stall stage at design speed, and the critical stall stage could be changed by adjusting the speed ratio of the two rotors. It is also observed that the hysteresis stall loop appears when the first rotor is the critical stall stage, while it doesn't appears when the second rotor is the critical stall stage.

     

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