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Effect of Suction and Discharge Conditions on the Unsteady Flow Phenomena of Axial-Flow Reactor Coolant Pump

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Listed:
  • Xin Chen

    (College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

  • Shiyang Li

    (College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

  • Dazhuan Wu

    (College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
    State Key Laboratory of Fluid Power Transmission and Control, Hangzhou 310027, China)

  • Shuai Yang

    (College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

  • Peng Wu

    (College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

In order to study the effects of the suction and discharge conditions on the hydraulic performance and unsteady flow phenomena of an axial-flow reactor coolant pump (RCP), three RCP models with different suction and discharge configurations are analyzed by computational fluid dynamics (CFD) method. The CFD results are validated by experimental data. The hydraulic performance of the three RCP models shows little difference. However, the unsteady flow phenomena of RCP are significantly affected by the variation of suction and discharge conditions. Compared with that of Model E-S (baseline, elbow-single nozzle), the pressure pulsation in rotating frame of Model S-S (straight pipe-single nozzle) and Model E-D (elbow-double nozzles) is weakened in different degrees and forms, due to the more uniform flow fields upstream and downstream of the impeller, respectively. It indicates that the generalized rotor-stator interaction (RSI) actually exists between the rotating impeller and all stationary components causing the circumferentially non-uniform flow. Furthermore, improving the circumferential uniformity of the flow upstream and downstream of impeller (suction and discharge flow) also contributes to reducing the radial dynamic fluid force acting on the impeller. Compared with those of Model E-S, the dynamic F X and F Y of Model S-S are severely weakened, and those of Model E-D also gain a minor amplitude decrease at f BPF . In contrast, the general pressure pulsation in fixed frame is mainly related to the rotating impeller and barely affected by the suction and discharge conditions.

Suggested Citation

  • Xin Chen & Shiyang Li & Dazhuan Wu & Shuai Yang & Peng Wu, 2020. "Effect of Suction and Discharge Conditions on the Unsteady Flow Phenomena of Axial-Flow Reactor Coolant Pump," Energies, MDPI, vol. 13(7), pages 1-25, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1592-:d:339814
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    References listed on IDEAS

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    1. Yue Hao & Lei Tan & Yabin Liu & Yun Xu & Jinsong Zhang & Baoshan Zhu, 2017. "Energy Performance and Radial Force of a Mixed-Flow Pump with Symmetrical and Unsymmetrical Tip Clearances," Energies, MDPI, vol. 10(1), pages 1-13, January.
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