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Turbulence Characteristics in the Mixing Layer of a Submerged Cavitating Jet at High Reynolds Numbers

Author

Listed:
  • Yongfei Yang

    (School of Mechanical Engineering, Nantong University, Nantong 226019, China)

  • Gaowei Wang

    (School of Mechanical Engineering, Nantong University, Nantong 226019, China)

  • Weidong Shi

    (School of Mechanical Engineering, Nantong University, Nantong 226019, China)

  • Wei Li

    (Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China)

  • Leilei Ji

    (Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China)

  • Hongliang Wang

    (School of Aeronautical and Mechanical Engineering, Changzhou Institute of Technology, Changzhou 213032, China)

Abstract

In this paper, unsteady and time-averaged turbulence characteristics in a submerged cavitating jet with a high Reynolds number are studied using large eddy simulation. The simulation is validated by comparing the vapor distribution using CFD and a high-speed photography experiment. The results indicate that the currently used numerical method can predict the evolution of the cavitation cloud in the jet accurately. The instantaneous and time-averaged flow fields of the submerged jet with three different cavitation numbers are studied. Comparing the frequency spectral of jets with different cavitation numbers, it is found that, for a fixed location, the frequency increases with the decrease in the cavitation number. Comparing the vorticity distribution at different streamwise locations, the instability process of the ring-shapes vortexes is revealed. Comparing the shape of the cavitation cloud and the vortexes in the jet finds that their spatial distribution and the temporal evolution are similar, indicating that the dynamic characteristics of the vortex and the cavitation affect each other. For the currently investigated cavitating jets, the Reynolds number increases with the decrease in the cavitation number. However, the spreading rate is lower for the jet with higher Reynolds numbers here. This is means that the momentum exchange between the jet and submerging water is reduced by the cavitation phenomenon.

Suggested Citation

  • Yongfei Yang & Gaowei Wang & Weidong Shi & Wei Li & Leilei Ji & Hongliang Wang, 2022. "Turbulence Characteristics in the Mixing Layer of a Submerged Cavitating Jet at High Reynolds Numbers," Sustainability, MDPI, vol. 14(19), pages 1-17, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:19:p:11963-:d:921952
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    References listed on IDEAS

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    1. Zhang, Yuquan & Zang, Wei & Zheng, Jinhai & Cappietti, Lorenzo & Zhang, Jisheng & Zheng, Yuan & Fernandez-Rodriguez, E., 2021. "The influence of waves propagating with the current on the wake of a tidal stream turbine," Applied Energy, Elsevier, vol. 290(C).
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    Cited by:

    1. Xin He & Changjiang Yuan & Haoran Gao & Yaqing Chen & Rui Zhao, 2023. "Calibration of Turbulent Model Constants Based on Experimental Data Assimilation: Numerical Prediction of Subsonic Jet Flow Characteristics," Sustainability, MDPI, vol. 15(13), pages 1-18, June.

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