An Investigating of the Impact of Bed Flume Discordance on the Weir-Gate Hydraulic Structure

Abstract

Discordance and concordance play a significant role in the hydraulic response for the flume, open channel, hydraulic structure, and flow field measurement. Bed discordance and bed concordance are regarded as common problems in open channels. Discordance is the dominant one, which could have an effect on the hydraulic structure that is constructed inside the channel. This paper deals with the impact of bed flume discordance on hydraulic flow characteristics at the weir-gate downstream hydraulic regime. Four configurations with different lengths and heights of the bed flume discordance are adopted here to investigate the impact of these configurations on the hydraulic characteristics. In addition, one configuration of the bed flume concordance is adopted to compare with the other four configurations. At downstream, the average water depth becomes dimensionless by dividing by upstream water depth, vertical distance between weir and gate, length of downstream, length of concordance, and length of discordance in order to evaluate the inequality in the distribution of Froude number. On one hand, certain results appear strongly between Reynolds number and Froude number at downstream, actual discharge and flow velocity at downstream, flow area past the gate and Froude number at downstream. On the other hand, there was a complex dramatic relation between the weir-gate discharge coefficient and Froude number at downstream. Overall, the study shows that there is a good relationship between specific energy, water depth, and flow speed. Doi: 10.28991/HIJ-2022-03-03-09 Full Text: PDF

Experimental Investigation of Emerged Dike Influence on Combined Discharge Structures in Open Channel Flow

“…As the water depth increases, the Froude number will decrease due to the inversely proportional relationship between them. For model (5), which has Ag/BH = 0.088 and d = 3cm. in case (1), the maximum value of Fr is 1.21 and the maximum value of Fr is 0.4 for all cases 2, 3, and 4.…”

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Hydraulic Behavior of Weir-Gate Structure with Rectangular Side Obstacle under Free and Submerged Flow Conditions

“…here, the length and thickness of the obstacle is considered changeable while the width is constant. Qasim et al [6] investigated how the combined hydraulic will be influence by the discordance of the bed flume, the investigation dealt with hydraulic characteristics at the downstream of the combined structure. Notably, every published research has demonstrated that machine learning systems can reliably predict Cd.…”