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Experimental investigation of cavity length pulsation characteristics of jet pumps during limited operation stage

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  • Wang, Jiong
  • Xu, Shuangjie
  • Cheng, Huaiyu
  • Ji, Bin
  • Zhang, Junqiang
  • Long, Xinping

Abstract

Experiments were conducted to investigate the cavity length pulsation characteristics in jet pumps with different area ratios during limited operation stage. Images of various cavitating flows were captured and analyzed to study the cavity length pulsation characteristics by high speed camera technology. It was found that the development tendency of time-averaged cavity length can be divided into two sections with different pulsation intensity by throat length. Further analysis indicated that the time-averaged cavity length is a function of area ratio and outlet pressure ratio independent of the inlet pressure. And the time-averaged cavity length decreases slowly and then faster with the increase of comprehensive parameters. Meanwhile, the cavity length pulsation can be decomposed into low frequency component and high frequency component. The pulsation intensity of low frequency component is relatively high during unstable limited operation stage, while it is at a low level during stable limited operation stage. Besides, smaller area ratio and inlet pressure result in larger pulsation intensity of low frequency component during unstable limited operation stage. The experimental points of high frequency component pulsation intensity collapsed around a V-shaped curve and it reached the minimum value when time-averaged cavity length is approximate to the throat length.

Suggested Citation

  • Wang, Jiong & Xu, Shuangjie & Cheng, Huaiyu & Ji, Bin & Zhang, Junqiang & Long, Xinping, 2018. "Experimental investigation of cavity length pulsation characteristics of jet pumps during limited operation stage," Energy, Elsevier, vol. 163(C), pages 61-73.
    • Handle: RePEc:eee:energy:v:163:y:2018:i:c:p:61-73
    DOI: 10.1016/j.energy.2018.08.035
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    References listed on IDEAS

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    1. Ariafar, Kavous & Buttsworth, David & Al-Doori, Ghassan & Malpress, Ray, 2015. "Effect of mixing on the performance of wet steam ejectors," Energy, Elsevier, vol. 93(P2), pages 2030-2041.
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    Cited by:

    1. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.
    2. Huiyan Zhang & Daohang Zou & Xuelong Yang & Jiegang Mou & Qiwei Zhou & Maosen Xu, 2022. "Liquid–Gas Jet Pump: A Review," Energies, MDPI, vol. 15(19), pages 1-15, September.
    3. Ge, Mingming & Manikkam, Pratulya & Ghossein, Joe & Kumar Subramanian, Roshan & Coutier-Delgosha, Olivier & Zhang, Guangjian, 2022. "Dynamic mode decomposition to classify cavitating flow regimes induced by thermodynamic effects," Energy, Elsevier, vol. 254(PC).

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