Journal of Yangtze River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (4): 88-94.DOI: 10.11988/ckyyb.20211254

• HYDRAULICS • Previous Articles     Next Articles

Arrangement and Hydraulic Characteristics of Divider in 180° Turn Section of Vertical Slot Fishway

LIU Song-tao1, SHI Xiao-tao1, SUN Shuang-ke2, LI Guang-ning2, CHEN Li1, ZHANG Li-sheng1, TAN Jun-jun1, YANG Wen-jun3   

  1. 1. Hubei International Science and Technology Cooperation Base of Fish Passage, China Three Gorges University, Yichang 443002, China;
    2. China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
    3. Changjiang River Scientiffic Research Institute, Wuhan 430010, China
  • Received:2021-11-23 Revised:2022-02-07 Published:2023-04-26

Abstract: Restricted by hub layout and topography, many fish passage projects need to set up 180° turning section. Previous studies have found that the 180° turning section is prone to generate large recirculation area and hence affecting the upstreaming efficiency of fishes. Vertical rectifier plates are commonly used along the side walls of the turning section to improve the flow pattern of the turning section. Different from previous studies, we propose an arrangement scheme of adding a bulkhead along downstream direction to guide fish in the turning section. Numerical simulation of the flow field in the turning section demonstrate that the bulkhead arrangement makes the mainstream area basically centered, the recirculation area reduced, aspect ratio increased, and the flow area with different velocity values in the turning section formed.

Key words: vertical slot fishway, 180° turning section, numerical simulation, hydraulic characteristics;flow pattern

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