斜切挑坎水舌入水宽度随切角变化规律研究  

Study on Regularity of Miter Flip Bucket's Nappe Width Changing with Oblique Angle

作　　者：莫海春 陈和春[1] 罗伦[1] 邓伟[1] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《水电能源科学》2013年第11期124-126,254,共4页Water Resources and Power

摘　　要：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 of hydraulic characteristics of miter flip bucket＇s nappe, especially the regularity of water tongue width changing with oblique angle, based on Weiyuanjiang power station engineering data, traditional hy draulics method is used to calculate water tongue width for cut the spillway flip bucket with different angle. And then hy- draulic calculation results are validated by the hydraulic model test. The results show that with the increase o（ ohl, ique an- gle, water tongue transverse width decreases after increasing, and their correlativity is satisfied with curve equation; the difference of water tongue distance of high and low flip bucket gradually increases. So the really entry width of water tongue gradually extends, and the contact area of water and air increase, which is advantageous to the energy dissipation.

关 键 词：斜切挑坎 水舌 入水宽度 能量消耗 斜切角 

分 类 号：TV135.2[水利工程—水力学及河流动力学]