Connection Pipes of Transient Modeling

• Main Authors: Kuei Yueh Weng, 翁魁嶽
• Other Authors: Wen Chin Lin
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/31912246844755235037

碩士 === 中華大學 === 土木與工程資訊學系(所) === 96 === Due to climate change and watershed develop rapidly, more and more surface runoff causes pumping stations to overload pumping. In order to settle this question, we can construct connection pipes between pumping stations that can be allayed the drain of pumping by joint operation. Transient flow will accrue with misfeasance of control gates operated and the violent changes of boundary condition, and it brings high pressure from pressure vibrate and high pressure and positive wave whose will menace the save of pipe system. The purpose of this study is realized from SCL program all station's pressure-transients form different flow. SCL is the program of calculated pressure and flow velocity in connection pipes by method of characteristics and Saint-Venant equation. These cases include the Junghe pumping station, Junghe second pumping station and Chung Yuan pumping station in Taipei County. We hope to discuss the changes of pressure transients in connection pipes which arose from joint operation by control gate operated in flow fields changed.The result of study show that the highest pressure transient was 14 pa for gate closed with 1 second in fall flow, and the most violent vibrate of pressure was happened on middle of connection pipes. We suggest the water level of start pumping can lower 0.5 m, it will decrease the return flow in downstream front pools and pressure-transient after the control gate opened. Key words: transient, joint operation, connection pipe.