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| 混流式水泵水轮机全特性曲线S形区流动特性 | |
| 引用本文： | 张兰金,王正伟,常近时. 混流式水泵水轮机全特性曲线S形区流动特性[J]. 农业机械学报, 2011, 42(1): 39-43，73 |
| 作者姓名： | 张兰金 王正伟 常近时 |
| 作者单位： | 1. 华北水利水电学院电力学院,郑州,450011;清华大学水沙科学与水利水电工程国家重点实验室,北京,100084 2. 清华大学水沙科学与水利水电工程国家重点实验室,北京,100084 3. 中国农业大学水利与土木工程学院,北京,100083 |
| 基金项目： | 国家自然科学基金资助项目(50879036、50879088); 清华大学水沙科学与水利水电工程国家重点实验室统筹研究资助项目(2009T3) |
| 摘 要： | 混流式水泵水轮机转轮的离心效应较混流式水轮机明显,形成了全特性曲线上的S形特性。该S形区水泵水轮机流道内流动状况很不稳定,为了详细了解该区域的流动特性,选取等开度下水轮机工况、水轮机飞逸工况、零流量附近水轮机制动工况、零流量附近反水泵工况以及反水泵工况等5个工况点进行全流道定常流和非定常流数值分析。定常流动分析表明:全特性曲线上的S形区转轮和导叶流道内存在大量的涡,消耗了大量的水能,致使机组输出功率很小。非定常流场计算表明:在S形过渡工况区,蜗壳与尾水管直锥段内的压力脉动频率与幅值均相近,且幅值小;而导叶至叶片的无叶区和叶片进口的压力脉动幅值高,主要为高频脉动。 |
| 关 键 词： | 水泵水轮机 S形区 湍流模型 非定常流 |
Flow of Pump-turbine on S-shaped Region of Complete Characteristics |
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| Zhang Lanjin,Wang Zhengwei and Chang Jinshi. Flow of Pump-turbine on S-shaped Region of Complete Characteristics[J]. Transactions of the Chinese Society for Agricultural Machinery, 2011, 42(1): 39-43，73 | |
| Authors: | Zhang Lanjin Wang Zhengwei Chang Jinshi |
| Affiliation: | Zhang Lanjin1,2 Wang Zhengwei2 Chang Jinshi3 (1.Institute of Electric Power,North China University of Water Resources and Electric Power,Zhengzhou 450011,China 2.State Key Laboratory of Hydroscience and Engineering & Department of Thermal Engineering,Tsinghua University,Beijing 100084,China 3.College of Water Conservancy & Civil Engineering,China Agricultural University,Beijing 100083,China) |
| Abstract: | The S-shaped region of complete characteristics on pump-turbine is caused by centrifugal force larger than common hydraulic turbine.The flow on that S-shaped region is very much unsteady.In order to obtain the flow on that region,the steady and unsteady simulations were analyzed on turbine,turbine runaway,turbine brake near no-discharge,anti-pump near no-discharge and anti-pump operation conditions which run on S-shaped curve.The results showed that much large eddy existed in vanes and runner.That eddy wast... |
| Keywords: | Pump-turbine S-shaped region Turbulent model Unsteady flow |
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