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发明公开
CN107329940A 立轴混流式水轮机电站空化系数计算方法 有权

立轴混流式水轮机电站空化系数计算方法
摘要：
本发明涉及水电站水轮机，公开了一种立轴混流式水轮机电站空化系数计算方法，对立轴混流式水轮机电站空化系数进行计算。本发明方法如下：确定混流式水轮机的比转速，所述比转速记为ns；确定混流式水轮机的最大应用水头，所述最大应用水头记为Hmax，并判断Hmax所处的范围；根据Hmax对应范围的电站空化系数计算公式计算电站空化系数，所述电站空化系数记为σp，所述范围的电站空化系数计算公式为：当Hmax≤100m时， 当100m＜Hmax≤200m时，当200m＜Hmax≤300m时，当Hmax＞300m时， 本发明适用于立轴混流式水轮机电站空化系数的计算，能更好地满足新的水电工程要求。
摘要（英）：

The invention relates to hydropower station water turbines and discloses a vertical shaft mixed-flow water turbine power station cavitation coefficient calculation method for calculating vertical shaft, mixed-flow water turbine power station cavitation coefficient. The method includes: determining specific rotating speed ns of a mixed-flow water turbine; determining maximum application water head Hmax of the mixed-flow water turbine, and judging a range of the Hmax; calculating power station cavitation coefficient sigma p according to a power station cavitation coefficient calculation formula of the range corresponding to the Hmax, wherein the power station cavitation coefficient calculation formula of the range includes when Hmax is smaller than or equal to 100m, sigma p=2x10<-5>ns<1.6662>, when Hmax is greater than 100m and smaller than or equal to 200m, sigma p=2x10<-5>ns<1.6816>, when Hmax is greater than 200m and smaller than or equal to 300m, sigma p=5x10<-6>ns<1.9665> and when Hmax is greater than 300m, sigma p=7x10<-5>ns<1.4383>. The method is suitable for calculating the vertical shaft mixed-flow water turbine power station cavitation coefficient and can better meet new hydropower engineering requirements.

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