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Effect of cavitation on energy conversion characteristics of a multiphase pump

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  • Shi, Guangtai
  • Wang, Shan
  • Xiao, Yexiang
  • Liu, Zongku
  • Li, Helin
  • Liu, Xiaobing

Abstract

To reveal the effect of cavitation on the energy conversion characteristics of helical axial multiphase pump (Abbreviated to multiphase pump), the cavitation flow in multiphase pump is simulated. The results show that with the decrease of cavitation number σ, cavitation firstly extends along the streamwise of blade suction side, and then turns to the pressure side of blade. When cavitation develops to fracture stage, the suction side of the blade is completely covered by bubbles; The vapor volume fraction in the impeller is almost 0 at the inception and critical cavitation stages; When cavitation develops to fracture stage, cavitation extends to the whole impeller passage. The output power of impeller is mainly contributed to the power done by the pressure. The power done by the viscous force in the critical fracture cavitation stage is slightly reduced. While, the power done by the pressure in the fracture cavitation stage decreases greatly. With the evolution of cavitation, the turbulence dissipation loss in the impeller decreases gradually. Moreover, in the critical fracture and fracture cavitation stages, the friction loss increases greatly compared with the previous two cavitation stages, resulting in an increment of the total energy loss.

Suggested Citation

  • Shi, Guangtai & Wang, Shan & Xiao, Yexiang & Liu, Zongku & Li, Helin & Liu, Xiaobing, 2021. "Effect of cavitation on energy conversion characteristics of a multiphase pump," Renewable Energy, Elsevier, vol. 177(C), pages 1308-1320.
    • Handle: RePEc:eee:renene:v:177:y:2021:i:c:p:1308-1320
    DOI: 10.1016/j.renene.2021.05.119
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    References listed on IDEAS

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    1. Tao, Ran & Xiao, Ruofu & Wang, Fujun & Liu, Weichao, 2018. "Cavitation behavior study in the pump mode of a reversible pump-turbine," Renewable Energy, Elsevier, vol. 125(C), pages 655-667.
    2. Xuelin Tang & Mingde Zou & Fujun Wang & Xiaoqin Li & Xiaoyan Shi, 2017. "Comprehensive Numerical Investigations of Unsteady Internal Flows and Cavitation Characteristics in Double-Suction Centrifugal Pump," Mathematical Problems in Engineering, Hindawi, vol. 2017, pages 1-13, August.
    3. Liu, Ming & Tan, Lei & Cao, Shuliang, 2019. "Dynamic mode decomposition of gas-liquid flow in a rotodynamic multiphase pump," Renewable Energy, Elsevier, vol. 139(C), pages 1159-1175.
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    1. Zhang, Qing & Gao, Ya & Chu, Miaoqi & Chen, Pice & Zhang, Qingteng & Wang, Jin, 2023. "Enhanced energy conversion efficiency promoted by cavitation in gasoline direct injection," Energy, Elsevier, vol. 265(C).
    2. 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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