Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Experiment and modeling of liquid-phase flow in a venturi tube using stereoscopic PIV

  • Song, Yuchen (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Shentu, Yunqi (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Qian, Yalan (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Yin, Junlian (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Wang, Dezhong (School of Mechanical Engineering, Shanghai Jiao Tong University)
  • Received : 2019.10.30
  • Accepted : 2020.06.18
  • Published : 2021.01.25
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Abstract

Venturi tube is based on turbulent flow, whereby the microbubbles can be generated by the turbulent fragmentation. This phenomenon is common in several venturi bubblers used by the nuclear, aerospace and chemical industries. The first objective of this paper is to study the liquid-phase velocity field experimentally and develop correlations for the turbulent quantities. The second objective is to research velocity field characteristics theoretically. Stereoscopic PIV measurements for the velocity field have been analyzed and utilized to develop the turbulent kinetic energy in the venturi tube. The tracking properties of the tracer particles have been verified enough for us to analyze the turbulence field. The turbulence kinetic energy has a bimodal distribution trend. Also, the results of turbulence intensity along the horizontal direction is gradually uniform along the downstream. Both the mean velocity and the fluctuation velocity are proportional to the Reynolds number. Besides, the distribution trend of the mean velocity and the velocity fluctuation can be determined by the geometric parameters of the venturi tube. An analytical function model for the flow field has been developed to obtain the approximate analytical solutions. Good agreement is observed between the model predictions and experimental data.

Keywords

Acknowledgement

The authors wish to thank the National Natural Science Foundation of China (No.11535009 and A050507).

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