台阶溢流坝下的流速探讨  

Study on Toe Velocity of Stepped Overflow Dam

作　　者：吴宪生[1] 

机构地区：[1]国家电力公司成都勘测设计研究院科学研究所,成都610071

出　　处：《水力发电学报》2001年第2期73-75,共3页Journal of Hydroelectric Engineering

摘　　要：本文分析了台阶溢流坝坝面水流流态 ,从明渠水力学的角度出发 ,推求出台阶溢流坝坝下流速的表达式 ,并通过水力模型试验研究 ,求得了台阶溢流坝坝下流速的计算式。该式的计算结果与其他学者的模型试验成果尚能吻合 ,表明该式具有一定的适应性。同时 ,该式亦可用于对台阶溢流坝坝面最大流速进行估计 ,以便判别坝面出现空蚀破坏的可能性。Based on the analysis of flow pattern of stepped overflow dam, a velocity expression of stepped overflow dam is inferred from open channel hydraulics viewpoint. Furthermore, a formula that can calculte toe velocities of stepped overflow dam is obtained by means of hydraulic model test researches. The formula calculations are identical with the results of hydraulic model test of other researchers. It is clear that the formula is applicable in a certain area. The calculations are also useful to estimate the maximum velocity of overflow surface that can be use to judge the possibilities of cavitation damage at the stepped overflow surface.

关 键 词：台阶溢流坝 流速 滑掠水流 单宽流量 

分 类 号：TV652.1[水利工程—水利水电工程] TV133