受边壁影响的矩形光滑明渠垂线流速分布研究  

Velocity Distribution Formula in Smooth Rectangular Open Channel Flows with Low Aspect Ratio

作　　者：毋敏[1] 梁越[2] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]福建省水利水电勘测设计研究院,福建福州350001

出　　处：《吉林水利》2016年第6期33-35,43,共4页Jilin Water Resources

摘　　要：当明渠宽深比较小时,由于边界剪切应力分布不再是均匀的。垂线流速分布由底向上,从某一高度开始,在该点以下为对数分布,在该点以上为抛物线分布。本文在已有研究理论的基础上,验证了流速最大点位置α分布公式的正确性,提出了光滑矩形明渠各垂线上流速分布的新抛物线公式。When the width-depth ratio of smooth channel was small,the bottom of the shear force was no longer uniform.Vertical velocity distribution from the bottom to the top started from a certain height,in which the following was logarithmic distribution,above this point was the parabolic distribution.On the basis of previous theoretical studies and the existing tests,the paper verified the accuracy of α distribution formula on velocity maximum point location,then put forward a new parabolic formula of vertical velocity distribution in smooth rectangular open channel flow.

关 键 词：光滑矩形明渠 流速分布 边壁影响 抛物线公式 

分 类 号：TV133[水利工程—水力学及河流动力学]