上游调压室理想阻抗孔面积选择的影响因素分析  

An Analysis of the Influencing Factors on the Orifice Size of the Upstream Surge Chamber

作　　者：蔡付林[1] 周亚楠 周建旭[1] 刘道桦 冯思奇 CAI Fu-in;ZHOU Ya-nan;ZHOU Jian-xu;LIU Dao-hua;FENG Si-qi(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,Jiangsu Province,China;Power China Chengdu Engineering Corporation Limited,Chengdu 610072,Sichuan Province,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《中国农村水利水电》2023年第7期250-255,共6页China Rural Water and Hydropower

摘　　要：针对设置上游阻抗式调压室的引水发电系统,利用特征线法进行大波动过渡过程计算,模拟并分析了引水隧洞长度、两种导叶关闭规律、输水管道糙率以及机组转动惯量对水力过渡过程中调压室理想阻抗孔面积取值的影响。结果表明:在保证其他条件不变的情况下,引水隧洞长度、机组转动惯量以及管道糙率的取值越大,理想阻抗孔的面积越小;先慢后快的导叶关闭规律对阻抗孔面积取值的影响较先快后慢的关闭规律更大。结论对实际工程设计具有参考价值。The characteristic method is used to calculate the large fluctuation transient process of a diversion power generation system with upstream throttled surge chamber.The influence of the length of headrace tunnel,closing law of guide vanes,roughness of pipeline and moment of inertia of the unit on the value of ideal throttled orifice area in the hydraulic transients are simulated and analyzed.The results show that the larger the length of the headrace tunnel,the moment of inertia of unit and the roughness of pipeline,the smaller the area of ideal throttled orifice.The conclusion has some guiding significance for practical engineering design.

关 键 词：上游调压室 理想阻抗孔面积 长引水隧洞 导叶关闭规律 糙率 机组转动惯量 

分 类 号：TV732.5[水利工程—水利水电工程]