Volume 36 Issue 1
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ZHAO Yizhen, WEI Song, MAO Junkui. Local pressure drop and flow resistance characteristic at entrance of tubed vortex reducer[J]. Journal of Aerospace Power, 2021, 36(1): 42-52. doi: 10.13224/j.cnki.jasp.2021.01.006
Citation: ZHAO Yizhen, WEI Song, MAO Junkui. Local pressure drop and flow resistance characteristic at entrance of tubed vortex reducer[J]. Journal of Aerospace Power, 2021, 36(1): 42-52. doi: 10.13224/j.cnki.jasp.2021.01.006
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Local pressure drop and flow resistance characteristic at entrance of tubed vortex reducer

doi: 10.13224/j.cnki.jasp.2021.01.006
  • 1.

    Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China

  • 2.

    College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

  • Received Date: 2020-04-23
  • Publish Date: 2021-01-28
    Abstract
  • The flow structure and flow loss characteristic in a rotating cavity with tubed vortex reducer were studied numerically. The study focused on the mechanism of the tubed vortex reducer, especially the local loss characteristic at the tube entrance under different geometric parameters of the tube. Based on these studies, a mathematical model for predicting the pressure drop in a tubed cavity was established. It was found that the local loss characteristics at the tube entrance were related to the flow state before the entrance, and the incident angle can describe this flow state well. The static pressure loss at the tube entrance cannot be ignored, accounting for about 11% of the total static pressure drop in the rotating cavity. Furthermore, the tube with a moderate-length can restrict the rotation of the air and reduce the pressure drop in the rotating cavity more effectively. Under the research conditions, the tubed vortex reducer with the optimal tube length can reduce the local pressure drop at the tube entrance by about 25% and the overall static pressure drop in the cavity by about 10%. This also showed that, the mathematical model can provide accurate results of the static pressure distribution in the tubed vortex reducer. The average error was about 53% between the CFD results and the mathematical model results.

     

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