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Study on Aeration Characteristics of Grid Type Underflow Energy Dissipation
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Ya-fei GE1, 2, Yong QIU1, Pei-shan HE3, Jin-bing PU1, Yun-qiu HE1
Water Resources and Power | 2023, 41(11) : 99 - 103
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Water Resources and Power | 2023, 41(11): 99-103
• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •
Study on Aeration Characteristics of Grid Type Underflow Energy Dissipation
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Ya-fei GE1, 2, Yong QIU1, Pei-shan HE3, Jin-bing PU1, Yun-qiu HE1
Affiliations
  • 1.College of Water Conservancy, Yunnan Agricultural University, Kunming 650201, China
  • 2.Baoying Station Management Office of Jiangsu Water Source Co., Ltd. on the East Line of the South to North Water Diversion Project, Yangzhou 225000, China
  • 3.Kunming Hongzhao Water Conservancy and Hydropower Engineering Design and Consulting Co., Ltd., Kunming 650020, China
Published: 2023-11-25 doi: 10.20040/j.cnki.1000-7709.2023.20222597
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For underflow energy dissipation, the arrangement of the grille shortens the length of the stilling pool and makes it easier to adapt to changes in terrain conditions. The two-phase flow of water and gas in the round-bore Γ-shaped grille type stilling pool was numerically simulated by the aeration model in FLOW-3D. The results show that the concentration of longitudinal bottoming gas decreased (31.3% →8.0%) along the way, and decreased significantly at the grid position, the minimum number of holes in front of the grid (#6 section) was 5.6, the number of holes near the grid was about 9.0, and the number of holes behind the grid was much greater than 9.0. The bubble size near the bottom of the grid front axis increases along the course (0.9 mm→8.1 mm), and the bubble size of the near bottom plate after the grid decreases along the way (1.6 mm decreases to close to 0 mm). It can be considered that the bubbles with smaller diameters in large flow velocity areas play a major role in aeration corrosion reduction, which has obvious protective effect on the solid boundary of concrete, and the structure of the stilling pool including the grid is not easy to occur cavitation erosion damage.

bubble scale  /  Turbulence intensity  /  doped corrosion reduction  /  energy dissipation by bottom flow  /  numerical simulation
Ya-fei GE, Yong QIU, Pei-shan HE, Jin-bing PU, Yun-qiu HE. Study on Aeration Characteristics of Grid Type Underflow Energy Dissipation[J]. Water Resources and Power, 2023 , 41 (11) : 99 -103 . DOI: 10.20040/j.cnki.1000-7709.2023.20222597
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Year 2023 volume 41 Issue 11
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20222597
  • Receive Date：2022-12-16
  • Online Date：2026-01-27
  • Published：2023-11-25
Article Data
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History
  • Received：2022-12-16
  • Revised：2023-02-01
Funding
Affiliations
    1.College of Water Conservancy, Yunnan Agricultural University, Kunming 650201, China
    2.Baoying Station Management Office of Jiangsu Water Source Co., Ltd. on the East Line of the South to North Water Diversion Project, Yangzhou 225000, China
    3.Kunming Hongzhao Water Conservancy and Hydropower Engineering Design and Consulting Co., Ltd., Kunming 650020, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
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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