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本文介绍了利用计算机绘制混流式水轮机运转特性曲线的计算方法、框图和绘图结果。在等效率线换算中采用的辐射取点法具有计算简单、准确、数据采集量小等优点;文中提出的通过模型水轮机的等当量吸出高度线来换算原型水轮机的等吸出高度线的方法,成功地解决了由计算机绘制吸出高度线所遇到的困难。绘图结果表明,采用以上方法绘出的运转特性曲线是令人满意的。
This paper introduces the calculation method, block diagram and drawing result of computer using the characteristic curve of Francis turbine. The method of taking the point of radiation in the conversion of equivalent efficiency line has the advantages of simple calculation, accuracy and small data acquisition. The method of calculating the equal suction height line of the prototype turbine through equivalent suction of the model turbine is proposed in this paper. Solve the difficulties encountered by the computer draw suction height line. The results show that the operation of the curve drawn above method is satisfactory.