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Experimental Study on Hydrodynamic Characteristics of Open Channel Tributary Intersection Area Based on PIV Technology
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Fei WU1, Feng-peng BAI2, 3, Xue-ni CHEN4, Rui-fen LIU1, Zhong-hua YANG4, Chao WANG2, 3, Wei YIN2, 3
Water Resources and Power | 2023, 41(11) : 111 - 115
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Water Resources and Power | 2023, 41(11): 111-115
• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •
Experimental Study on Hydrodynamic Characteristics of Open Channel Tributary Intersection Area Based on PIV Technology
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Fei WU1, Feng-peng BAI2, 3, Xue-ni CHEN4, Rui-fen LIU1, Zhong-hua YANG4, Chao WANG2, 3, Wei YIN2, 3
Affiliations
  • 1.College of Civil Engineering and Environment, Hubei University of Technology, Wuhan 430068, China
  • 2.Changjiang Water Resources Protection Institute, Wuhan 430051, China
  • 3.Key Laboratory of Ecological Regulation of Non-point Source Pollution in Lake and Reservoir Water Sources, Changjiang Water Resources Commission, Wuhan 430051, China
  • 4.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Published: 2023-11-25 doi: 10.20040/j.cnki.1000-7709.2023.20222608
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Under the condition of low flow ratio, the flow structure of the inlet area of tributaries is very complicated. Based on physical model test and PIV particle image velocimetry technology, the average velocity distribution and three-dimensional velocity spatial distribution of open channel tributaries under different intersection conditions were observed, and the variation law of the flow field of tributaries was analyzed. The results show that when the confluence is relatively small, the surface water of the tributaries will have reverse reflux phenomenon to varying degrees due to the top supporting effect of the main stream water, while the bottom water flows downstream to the main stream, and there is a relatively obvious oblique mixing interface. With the increase of the confluence ratio, the influence of the main stream on the flow structure of the left bank of the tributary decreases gradually. When the intersection angle is 30° and 90°, the water flow structure near the right bank section is most affected by the water top support of the main flow. When the intersection angle is 150°, the tributaries are basically in reverse reflux state, and the maximum reflux velocity area is formed at the intersection. The results can provide theoretical support for the study of frequent bloom caused by nutrient enrichment in tributaries of reservoir area.

PIV  /  confluence of main stream and tributary stream  /  change of flow field  /  hydraulic characteristics
Fei WU, Feng-peng BAI, Xue-ni CHEN, Rui-fen LIU, Zhong-hua YANG, Chao WANG, Wei YIN. Experimental Study on Hydrodynamic Characteristics of Open Channel Tributary Intersection Area Based on PIV Technology[J]. Water Resources and Power, 2023 , 41 (11) : 111 -115 . DOI: 10.20040/j.cnki.1000-7709.2023.20222608
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Year 2023 volume 41 Issue 11
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20222608
  • Receive Date：2022-12-19
  • Online Date：2026-01-27
  • Published：2023-11-25
Article Data
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History
  • Received：2022-12-19
  • Revised：2023-02-06
Funding
Affiliations
    1.College of Civil Engineering and Environment, Hubei University of Technology, Wuhan 430068, China
    2.Changjiang Water Resources Protection Institute, Wuhan 430051, China
    3.Key Laboratory of Ecological Regulation of Non-point Source Pollution in Lake and Reservoir Water Sources, Changjiang Water Resources Commission, Wuhan 430051, China
    4.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
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https://castjournals.cast.org.cn/joweb/sdnykx/EN/10.20040/j.cnki.1000-7709.2023.20222608
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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