摘要
射流冲刷作为水库清淤手段已有较广泛的应用,冲刷过程中的悬沙特性是衡量清淤效果的重要指标,为此对淹没射流冲刷过程的悬沙特性开展了试验研究。改变射流速度和喷射靶距进行了系列二维平面射流冲刷粗沙的试验,摄录了不同射流参数下的悬沙高度和悬沙宽度的变化过程。结果显示,悬沙高度与悬沙宽度随时间变化会出现一个峰值,并最终在很小的范围内波动;悬沙高度与悬沙宽度随射流速度和喷射靶距的增加基本呈线性增加;随冲刷参数数值的增加,悬沙相对喷射靶距的无量纲尺寸呈线性增加。
Jet scouring is widely used as a means of reservoir dredging. The characteristics of suspended sediment in the scouring process are important indicators of dredging effect. Therefore, the suspended sediment characteristics of submerged jet scouring process are studied experimentally. A series of two-dimensional plane jet tests are carried out to scour coarse sand by changing jet velocity and target distance, and the variations of suspending height and width under different jet parameters are recorded. The results show that the suspending sizes have peak values and finally fluctuate in a small range. The sizes of suspended sediment increase linearly with the jet velocity and target distance. The dimensionless sizes of suspended sediment related to the target distance grow linearly when the scour parameter increasing.
作者
黄佳丽
王勇
顾磊
倪福生
Huang Jiali;Wang Yong;Gu Lei;Ni Fusheng(Engineering Research Center of Dredging Technology ofMinistry of Education, Jiangsu Changzhou, 213022, China;College of Mechanical and Electrical Engineering, Hohai University, Jiangsu Changzhou, 213022, China;Jiangsu Hydraulic Machinery Manufacturing Co., Ltd., Jiangsu Yangzhou, 225001, China)
出处
《机械设计与制造工程》
2019年第5期96-100,共5页
Machine Design and Manufacturing Engineering
基金
国家重点研发计划(2018YFC0407404)
江苏省科技成果转化专项(BA2016143)
关键词
悬沙高度
悬沙宽度
射流速度
喷射靶距
射流清淤
suspending height
suspending width
jet velocity
target distance
jet dredging
作者简介
黄佳丽(1995-),女,硕士研究生,主要研究方向为疏浚设备与技术,15051972357@163.com.
