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排灌机械工程学报  2018, Vol. 36 Issue (1): 42-49    DOI: 10.3969/j.issn.1674-8530.17.0031
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T形三通管计算模型对尾水进口压力和调压室涌浪的影响
储善鹏, 张健, 俞晓东
河海大学水利水电学院, 江苏 南京 210098
Influence of tee minor hydraulic loss model on draft tube inlet pressure and upsurge in surge chamber
CHU Shanpeng, ZHANG Jian, YU Xiaodong
College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China
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摘要 针对含尾水调压室的抽水蓄能电站,以特征线法和瞬变流理论为理论基础,在考虑尾水调压室长连接管水体惯性作用及管壁弹性的基础上,在T形三通管节点处分别建立了基于恒定局部水头损失系数、Gardel公式、试验资料的3种计算模型.结合工程实例,应用T形三通管节点处的3种计算模型对水电站的过渡过程进行了数值模拟;采用Gardel公式和试验资料,计算了过渡过程中不同时刻点的局部水头损失系数,研究了不同计算模型对尾水进口压力水头和涌浪水位的影响.结果表明:基于恒定局部水头损失系数的计算模型其阻抗作用最小,对应的尾水进口最小压力和最高涌浪最大;基于试验资料的计算模型其阻抗作用最大,对应的尾水进口最小压力和最高涌浪最小;基于Gardel公式的计算模型次之.
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储善鹏
张健
俞晓东
关键词三通管   计算模型   局部水头损失系数   尾水进口最小压力   调压室涌浪     
Abstract: Transient hydrodynamic flow in the penstock of a pumped storage power station with surge chamber was simulated numerically in the paper by using method of characteristic and by involving pipe elasticity and water body inertia. In the simulation, the pipe tee was considered as a computational node, the minor hydraulic loss across it was modelled respectively with a constant minor hydraulic loss coefficient, Gardel formula and experimental data. Influences of three models on the pressure at the draft tube inlet and upsurge in the surge chamber were identified. Results showed that the impedance based on the constant minor hydraulic head loss coefficient was the minimum, and the corresponding maximum upsurge and minimum pressure at the draft tube inlet were the highest. The impedance based on the experimental data was the maximum, and the corresponding maximum upsurge and minimum pressure were the lowest. The impedance based on the Gardel formula was in between. The conclusion can provide a reference for estimating maximum upsurge and minimum pressure at draft tube inlet in hydraulic engineering.
Key wordstee minor   calculation model   local head loss coefficient   minimum pressure at draft tube inlet   chamber surge   
收稿日期: 2017-02-20;
基金资助:国家自然科学基金资助项目(51379064,51409087);国家重点研发计划重点专项(2016YFC0401800);江苏高校优势学科建设工程专项
通讯作者: 张健(1970—),男,河南信阳人,教授(jzhang@hhu.edu.cn),主要从事水利水电工程非恒定流理论,水电站、泵站的过渡过程控制与仿真,长距离、跨流域输配水系统的供水安全研究.   
作者简介: 储善鹏(1992—),男,浙江宁波人,硕士研究生(1516292453@qq.com),主要从事水电站、抽水蓄能电站及泵站过渡过程研究.
引用本文:   
储善鹏,张健,俞晓东. T形三通管计算模型对尾水进口压力和调压室涌浪的影响[J]. 排灌机械工程学报, 2018, 36(1): 42-49.
CHU Shan-Peng,ZHANG Jian,YU Xiao-Dong. Influence of tee minor hydraulic loss model on draft tube inlet pressure and upsurge in surge chamber[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(1): 42-49.
 
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