排灌机械工程学报
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排灌机械工程学报  2015, Vol. 33 Issue (8): 674-680    DOI: 10.3969/j.issn.1674-8530.13.1026
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抽蓄电站全过流系统水泵工况停机过渡过程CFD模拟
张蓝国1,2, 周大庆1, 陈会向3
1.河海大学能源与电气学院, 江苏 南京 211100; 2.中国电建集团北京勘测设计研究院有限公司, 北京 100024; 3.河海大学水利水电学院, 江苏 南京 210098
CFD simulation of shutdown transient process of pumped storage power station under pump conditions
Zhang Languo1,2, Zhou Daqing1, Chen Huixiang3
1.College of Energy and Electrical Engineering, Hohai University, Nanjing, Jiangsu 211100, China; 2.Power China Beijing Enginee-ring Corporation Limited, Beijing 100024, China; 3.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China
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摘要 通过建立某抽蓄电站全过流系统的几何模型,将VOF两相流与单相流流动模型相结合,采用三维非定常流动过渡过程研究方法对泵工况停机过渡过程进行数值计算,获得了机组转速、流量、转轮力矩,以及若干测点压力脉动等参数随时间的变化过程和不同时刻的流场演变规律,并将结果与电站原型试验资料进行了对比.结果表明:机组转速变化规律、蜗壳和尾水管进口压强极值与试验结果基本吻合;抽蓄电站泵工况停机过程中,蜗壳进口和尾水管进口压强变化明显受活动导叶关闭规律的影响,而转轮与活动导叶之间的压强主要受机组转速的影响;随着活动导叶的关闭,当流量小到一定值后,水流主要通过尾水管内侧流向上游,而外侧水流会与转轮同向旋转;导叶全关后,尾水管内的旋涡是导致其能量损耗的主要因素.
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张蓝国
周大庆
陈会向
关键词抽水蓄能电站   泵工况   停机过渡过程   数值模拟   联合计算     
Abstract: Three-dimensional unsteady numerical simulations, combined with the normal single-phase model and the VOF model, were executed on the geometrical model of the whole flow system of a pumped storage power station. Through numerical calculation, the changeable flow configuration and variation law of some parameters, such as unit rotating speed, flux, runner moment and pressure of measurement points were obtained and compared with experimental data. Results show that the extreme value of unit rotating speed and measurement points pressure agree fairly well with experimental data. In the shutdown transient process, pressure variation at spiral casing inlet and draft tube inlet is influe-nced by the closure law of guide vanes, while that between runner and guide vanes is mainly affected by runner rotation. As guide vanes close and flux decreases, water flows upstream through the inner side of the draft tube and rotates with the runner. After guide vanes close completely, vortex inside the draft tube is the key factor of its hydraulic energy loss.
Key wordspumped storage power station   pump condition   shutdown transient process   simulation   combined calculation   
收稿日期: 2013-11-06;
基金资助:

国家自然科学基金资助项目(51106042)

通讯作者: 周大庆(1976—),男,浙江泰顺人,副教授,博士(zhoudaqing@hhu.edu.cn),主要从事流体机械及工程研究.   
作者简介: 张蓝国(1988—),男,山东临沂人,硕士研究生(taiwan@126.com),主要从事水力机组过渡过程研究.
引用本文:   
张蓝国,,周大庆等. 抽蓄电站全过流系统水泵工况停机过渡过程CFD模拟[J]. 排灌机械工程学报, 2015, 33(8): 674-680.
ZHANG 蓝Guo-,,ZHOU Da-Qing- et al. CFD simulation of shutdown transient process of pumped storage power station under pump conditions[J]. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(8): 674-680.
 
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