Volume 34 Issue 2
Feb.  2019
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Effect of impeller velocity coefficient on parameters ratios between pump and its reverse mode[J]. Journal of Aerospace Power, 2019, 34(2). doi: 10.13224/j.cnki.jasp.2019.02.026
Citation: Effect of impeller velocity coefficient on parameters ratios between pump and its reverse mode[J]. Journal of Aerospace Power, 2019, 34(2). doi: 10.13224/j.cnki.jasp.2019.02.026

Effect of impeller velocity coefficient on parameters ratios between pump and its reverse mode

doi: 10.13224/j.cnki.jasp.2019.02.026
  • Received Date: 2018-04-12
  • Publish Date: 2019-02-28
  • In order to study the head ratio and flow rate ratio between pump and turbine mode of pump as turbine (PAT) based on the impeller velocity coefficient, 20 single passage impellers with specific speed 23-225 were analyzed based on renormalization group (RNG) k-ε simulation by CFX. The distribution of velocity coefficient was revealed for pump mode and turbine mode, and new head ratio and flow rate ratio between pump and turbine mode based on impeller velocity coefficient were proposed. Results showed that the impeller velocity coefficient of turbine mode was higher than the pump mode. Then 6 industrial PATs were experimented in experiment rig, indicating the result by the this method had less error than the results of Stepanoff, et al. The average errors of head ratio and flow rate ratio were just 5.38% and 5.16%, respectively. The study provides a theoretical basis for the selection and performance prediction of PAT.

     

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