Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Air horizontal jets into quiescent water

  • Weichao Li (Laboratory of Thermo-Fluid Science and Nuclear Engineering, School of Energy and Power Engineering, Northeast Electric Power University) ;
  • Zhaoming Meng (Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University) ;
  • Jianchuang Sun (Laboratory of Thermo-Fluid Science and Nuclear Engineering, School of Energy and Power Engineering, Northeast Electric Power University) ;
  • Weihua Cai (Laboratory of Thermo-Fluid Science and Nuclear Engineering, School of Energy and Power Engineering, Northeast Electric Power University) ;
  • Yandong Hou (Laboratory of Thermo-Fluid Science and Nuclear Engineering, School of Energy and Power Engineering, Northeast Electric Power University)
  • Received : 2022.09.07
  • Accepted : 2023.02.17
  • Published : 2023.06.25
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Abstract

Gas submerged jet is an outstanding thermohydraulic phenomenon in pool scrubbing of fission products during a severe nuclear accident. Experiments were performed on the hydraulic characteristics in the ranges of air mass flux 0.1-1400 kg/m2s and nozzle diameter 10-80 mm. The results showed that the dependence of inlet pressure on the mass flux follows a power law in subsonic jets and a linear law in sonic jets. The effect of nozzle submerged depth was negligible. The isolated bubbling regime, continuous bubbling regime, transition regime, and jetting regime were observed in turn, as the mass flux increased. In the bubbling regime and jetting regime, the air volume fraction distribution was approximately symmetric in space. Themelis model could capture the jet trajectory well. In the transition regime, the air volume fraction distribution loses symmetry due to the bifurcated secondary plume. The Li correlation and Themelis model showed sufficient accuracy for the prediction of jet penetration length.

Keywords

Acknowledgement

The financial support of the National Nature Science Foundation of China (12005036) and Doctoral Research Foundation of Northeast Electric Power University (BSJXM-2021210) are gratefully acknowledged.

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