Volume 37 Issue 9
Sep.  2022
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YANG Yuemin，ZHANG Zhiyu，LI Long，et al.Influence of rotor diameter‑distance ratio on performance of fuel cell gas circulating pump［J］.Journal of Aerospace Power，2022，37（9）：1970‑1978. doi: 10.13224/j.cnki.jasp.20210348
Citation: YANG Yuemin，ZHANG Zhiyu，LI Long，et al.Influence of rotor diameter‑distance ratio on performance of fuel cell gas circulating pump［J］.Journal of Aerospace Power，2022，37（9）：1970‑1978. doi: 10.13224/j.cnki.jasp.20210348
shu

Influence of rotor diameter‑distance ratio on performance of fuel cell gas circulating pump

doi: 10.13224/j.cnki.jasp.20210348
  • 1.

    School of Energy and Power Engineering，Lanzhou University of Technology，Lanzhou 730050，China

  • 2.

    Wenzhou Pump and Valve Engineering Research Institute，Lanzhou University of Technology，Wenzhou Zhejiiang 325100，China

  • 3.

    Beijing Spacecrafts，China Academy of Space Technology，Beijing 100094，China

Funds:

 G20190017

 20JR5RA452

  • Received Date: 2021-07-05
    Abstract

  • In order to reveal the influence of the diameter⁃distance ratio on the aerodynamic performance of the cam⁃type gas circulating pump，a three⁃lobe arc⁃involute⁃arc rotor profile equation was derived through coordinate transformation，and 6 gas circulations with different diameter ratios were established to compare and analyze the pump model.The re⁃normalization group k⁃ε （RNG k⁃ε） turbulence model was used to calculate the three⁃dimensional unsteady numerical simulation inside the rotor cavity，and in combination with the dynamic grid technology，the influence of the rotor diameter ratio on the volume flow characteristics of the gas circulating pump and the velocity distribution of the rotor cavity was analyzed，and the results were compared with the experimental results.The results showed that the rotor diameter‑distance ratio had a significant influence on the performance of the gas circulating pump.As the rotor diameter⁃distance ratio increased from 1.34 to 1.45，the average volume flow and instantaneous volume flow pulsation at the outlet of the pump showed an upward trend，and the changes were more obvious between 1.38-1.40.The average volume flow increased by 0.001 833 m3/s （15.8%）；when the rotor diameter⁃distance ratio was 1.38-1.40，the rotor received better force，the suppression of the radial excitation force component Fx of the rotor was more obvious，and the influence on the rotor radial excitation force component Fy was not significant；the vorticity distribution in the rotor cavity changed significantly with the variation of the diameter⁃distance ratio.When the rotor diameter⁃distance ratio was 1.40，the vorticity distribution in the rotor cavity was smaller，which effectively suppressed gas backflow.

     

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