An Experimental Study on the Dissipation Effect of a Baffle Downstream of a Weir

作     者：Joon-Gu Kang 

作者机构：River Experiment Center Korea Institute of Civil Engineering and Building Technology Andong South Korea 

出 版 物：《Engineering（科研）》 (工程（英文）（1947-3931）)

年 卷 期：2017年第9卷第11期

页      面：937-949页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Weir Scour Baffle Flow Dissipation 

摘      要：This study is an experimental study to analyze the dissipation effect of a baffle shape installed to reduce the scour problem downstream of a weir. The hydraulic experiment on the flow dissipation effect created by baffle installation was an experiment under a fixed bed condition to investigate the flow dissipation effect based on changes in flow in the apron downstream caused by?changes in baffle shape. The experimental analysis was conducted by measuring the flow rate at the apron downstream with and without the installation of a baffle on the basis of the flow dissipation effect. This experiment compared the flow dissipation effect achieved with five baffle shapes to analyze the effect of the baffle shape. Two conditions of flow rate were considered: when a water level in the area of super-critical flow was lower than the baffle height, and when it?flowed over the baffle. Overall, the flow dissipation effect was found to be?good when a square baffle with a large flow blocking area was used. The analysis also found that hydraulic jump was facilitated when the front part of the baffle was inclined, as flow was induced to the upper direction. The result of the experiment showed that when performing flow dissipation through the use of a baffle, the effect of flow blocking and flow duration alteration should be considered.