Flow choking over weir flow slit-type flip buckets

作     者：马飞 徐准 吴建华 MA Fei;XU Zhun;WU Jian-hua

作者机构：College of Water Conservancy and Hydropower Engineering Hohai University 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2015年第27卷第6期

页      面：907-912页

核心收录：

学科分类：080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.51179056) the PAPD(Grant No.3014-SYS1401) the Fundamental Research Funds for the Central Universities of China(Grant No.2014B03114) 

主　　题：flow choking jet trajectory dynamic pressure slit-type flip bucket weir flow 

摘      要：The flow choking may occur for weir flow slit-type flip buckets trader common operation conditions. An estimation method is developed through introducing a comprehensive coefficient to determine the approach flow Froude number for the flow choking to occur in those flip buckets. The error of the present method relative to the experimental data is less than 5%. The results show that, the Froude number for the flow choking to occur is related to the contraction ratio and the contraction angle of the flip buckets. When the flow choking occurs, the upper jet trajectory decreases and the lower one is almost not affected, and the dynamic pressures on the bottom and the sidewalls increase due to the flow profile rising on the flip buckets.