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本文利用激光测速仪对３种不同粗糙度，２种反弧半径的溢流反弧段的水流流速进行了测量，对边界层特性进行了分析研究．试验分析认为，水流流态，壁面粗糙度和壁面曲率对边界层特性有明显的影响
In this paper, the flow velocities of three different roughness and two anti-arc radius of the overflow anti-arc were measured by laser velocimeter, and the characteristics of the boundary layer were analyzed. Experimental analysis shows that the flow pattern, wall roughness and wall curvature have obvious influence on the boundary layer characteristics