| 冲击式水轮机折向器方程研究 |
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| 引用本文： | 刘小莲,张光科,杨中华.冲击式水轮机折向器方程研究[J].中国农村水利水电,2014,0(10):157-158. |
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| 作者姓名： | 刘小莲 张光科 杨中华 |
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| 作者单位： | 1. 四川大学水利水电学院
2. 四川大学工程设计研究院 |
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| 摘 要： | 冲击式水电站机组甩负荷时，为了减小压力管道压力值以及有效防止机组转速升高过大，需在喷嘴后设置折向器共同调节。故在过渡过程计算时通过喷嘴的流量不同于通过转轮的流量，需考虑折向器动作对流量变化的影响，即需引入折向器方程。本文从物理本质和机组特性出发提出折向器的方程，并用工程实例对其进行论证。
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| 收稿时间： | 2014-05-20 |
| 修稿时间： | 2014-06-03 |
Research on Deflector Equation of Impulse Water Turbine |
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| Abstract: | When the load is rejected in the hydropower station with impulse water turbine, the deflector will be closed fast to avoid the high rotor speed and the needle valve will be closed slowly to avoid the large pressure. Therefore, the discharge through the rotor is different form the needle valve on calculation of transients. And it needs to consider the impact of the deflector’s action on the discharge, which means that the deflector equation needs to be introduced on calculation of transients. Form the physical nature and characteristics of the turbine, the deflector equation is proposed and tested with an engineering example. |
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