Study on the Effect of Guide Wall on the Transverse Velocity in the Bend

Abstract

It is very important to understand the vertical transverse velocity distribution of the bend with the guide wall set on the axis to explain the improvement mechanism of the flow characteristics in the bend. Therefore, the effect of the guide wall on the transverse velocity under different parameters of the bend was presented. Considering the feature design of channel bend in real engineering project, axis, bottom slopes and discharges with two flow conditions were used as parameters. Analysis and observation showed the significant impact on the transverse velocity, the guide wall impact on both absolute value and the direction of the transverse velocity distribution and present certain laws. The absolute value is influenced by the change of velocity direction, while the direction is affected by the inlet flow condition. In contrast, the transverse velocity is effectively reduced by the installation of a guide wall, and the water depth differences are reduced as well. Therefore, the impact of the guide wall on the flow characteristic especially the transverse velocity was proved and these results are practically useful in channel bend design.