【摘要】 混流和轴流定浆式水轮机在部分负荷下运行时,尾水管中常出现较为强烈的振动。这种振动主要是由尾水管中的旋涡带所致。本文通过尾水管内流动的模拟,导出了由尾水涡带所引起的周期性振动的振动频率和脉动压力的计算公式。更多还原

【Abstract】 There is s strong vibration in the draft tube of a francis turbine or axial flow fixed blade propeller hydraulic turbine when the turbine is runn-ing on part loading. This is caused principally by the vortex core of whirling water in the draft tube. This paper gives the flow simulation of hydraulic turbine draft tubes. Then, the calculation formula of the frequency and force of vibration of the draft tube are derived.更多还原