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| Damage Characteristics of Deep Hole Gate Slot of Giant Hydropower Station |
| Received:March 13, 2024 Revised:November 22, 2024 |
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| DOI：10.7643/issn.1672-9242.2025.01.017 |
| KeyWord:giant hydropower station gate slot ultra-high water head erosion cavitation corrosion |
| Author | Institution |
| ZHU Yesen |
Power China Huadong Engineering Corporation Limited, Hangzhou , China;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Liaoning Dalian , China;Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Sichuan Zigong , China |
| CHEN Si |
Power China Huadong Engineering Corporation Limited, Hangzhou , China |
| YU Shijie |
Power China Huadong Engineering Corporation Limited, Hangzhou , China |
| XU Yunze |
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Liaoning Dalian , China |
| DOU Baojie |
Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Sichuan Zigong , China |
| HU Baowen |
Power China Huadong Engineering Corporation Limited, Hangzhou , China |
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| Abstract: |
| The work aims to study the hydraulic characteristics of the deep hole slot in the giant hydropower station, and explore the damage behavior of the metal in the slot under adverse flow conditions. In this paper, k-ε turbulent flow model and finite volume discrete method were used to numerically simulate the deep hole flow in the hydropower station, and study the influence of the local shape of the deep hole on the flow. The influence of flow velocity on the corrosion of the slot steel lining was investigated through an erosion corrosion nozzle experiment. The results showed that the change of the local shape of the deep hole had a great influence on the distribution of water pressure and velocity. The maximum flow velocity at the outlet of the deep hole could reach 45 m/s with a water head of 100 m. The pitting current of slot steel lining increased with the increase of flow velocity. In conclusion,the pitting tendency of 304 stainless steel increases with the increase of flow velocity, and as the flow velocity continues to increase to the actual operating conditions, problems such as erosion corrosion and cavitation will become more prominent, and certain protective measures need to be taken. |
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