台形断面開水路流れの水理特性について

Abstract

In this paper it is the objectives to investigate the effect of the channelboundary on the mean and turbulence structure in a trapezoidal open channel.Precise velocity measurements were carried out by using a Laser DopplerAnemometer, and two kinds of flow visualization techniques were used to make thethree-dimensional structure of turbulent flow visible in several trapezoidal openchannels.Secondary flow and its induced secondary flow cells were directly visualized bythe refined tracer method. Some attractive photographs are shown in this paper.The results show that secondary flow cells affect on the distributions of the velocityand the boundary shear stress.