Volume 13 Issue 3
Sep.  2020
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Article Navigation >  Water Science and Engineering  > 2020  >  13(3): 233-242
Xi-chen Wang, Jian Zhang, Zong-fu Fu, Hui Xu, Ting-yu Xu, Chen-lu Zhou. 2020: Influence of flow rate and baffle spacing on hydraulic characteristics of a novel baffle dropshaft  . Water Science and Engineering, 13(3): 233-242. doi: 10.1016/j.wse.2020.09.001
Citation: Xi-chen Wang, Jian Zhang, Zong-fu Fu, Hui Xu, Ting-yu Xu, Chen-lu Zhou. 2020: Influence of flow rate and baffle spacing on hydraulic characteristics of a novel baffle dropshaft  . Water Science and Engineering, 13(3): 233-242. doi: 10.1016/j.wse.2020.09.001
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Influence of flow rate and baffle spacing on hydraulic characteristics of a novel baffle dropshaft  

doi: 10.1016/j.wse.2020.09.001

  • a College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

  • b The Eastern Route of South-to-North Water Diversion Project Jiangsu Water Source Co., Ltd., Nanjing 210019, China

Funds:  This work was supported by the National Natural Science Foundation of China (Grants No. 51709087 and No. 51839008) and the Fifth “333 Project” of Jiangsu Province (Grant No. BRA2018061).
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  • Corresponding author: Jian Zhang
  • Received Date: 2019-09-20
  • Rev Recd Date: 2020-04-08
    Abstract
  • Due to limited flow capacity and the instability of the asymmetric structure of traditional baffle dropshafts, a novel baffle dropshaft with a symmetric structure, adopting the construction shield well directly, is proposed for large-range flow discharge in deep tunnel drainage systems. In this study, a two-phase flow field of the novel baffle dropshaft with three different baffle spacings was simulated at seven different flow rates with a three-dimensional (3D) numerical model verified with experiments, to study hydraulic characteristics of this novel baffle dropshaft. The results show that the novel baffle dropshaft has a remarkable energy dissipation effect. Baffle spacing of the novel baffle dropshaft has a greater effect on flow patterns and baffle pressure distributions than the comprehensive energy dissipation rate. Flow rate is a critical issue for the selection of baffle spacing in the design. Some guidance on baffle spacing selection and structure optimization for the application of this novel baffle dropshaft in deep tunnel drainage systems is proposed. 

     

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