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为了深入研究斜切挑坎挑流水舌的水力特性,特别是水舌入水宽度随切角的变化规律,以威远江水电站工程资料为依据,采用传统水力学计算方法,将溢洪道挑流鼻坎按不同的斜切角度斜切计算水舌入水宽度,并结合水工模型试验对水力计算结果进行验证。结果表明,随着斜切角度增大,水舌横向入水宽度呈现先增大后减小的趋势,且两者的相关关系满足曲线方程;高、低挑坎水舌的挑距差随切角增大而逐渐增大,水舌的实际入水宽度逐渐延长,增加了水与空气的接触面积,有利于能量耗散。
In order to further study the hydraulic characteristics of the tongue of beveled picker, especially the variation of water inlet width with chamfer angle, based on the project data of Weiyuanjiang hydropower station, According to different bevel angle, the width of water inlet was calculated, and hydraulic calculation results were verified by hydraulic model test. The results show that with the increase of the miter angle, the transverse water inlet width increases first and then decreases, and the correlation between them meets the curve equation. Increases and increases gradually, the actual width of water tongue gradually extended, increasing the water and air contact area, is conducive to energy dissipation.