耙吸式挖泥船作业过程中耙头周围泥沙遗漏特性  

Characteristics of sediment leakage around rake head in construction of trailing suction dredger

作　　者：张红升 江攀[2,3] 缪袁泉 ZHANG Hongsheng;JIANG Pan;MIAO Yuanquan(CCCC National Engineering Research Center of Dredging Technology and Equipment,Shanghai 201208,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;National Engineering Research Center for Water Transport Safety,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]中交疏浚技术装备国家工程研究中心有限公司,上海201208 [2]武汉理工大学交通与物流工程学院,湖北武汉430063 [3]武汉理工大学,国家水运安全工程技术研究中心,湖北武汉430063

出　　处：《水运工程》2023年第7期218-224,共7页Port & Waterway Engineering

摘　　要：针对耙吸式挖泥船工作过程中外流场泥沙遗漏问题,进行耙头工作过程中周围泥沙流动特性研究。采用数值模拟研究方法,分析耙头外部流场前端与后端泥沙遗漏情况,不同工况条件下的外流场泥沙浓度分布,得到真空度与航速变化对外流场泥沙分布的影响。结果表明,在外流场中耙头后部流场的泥沙遗漏更为严重,在流场的竖直与水平方向的遗漏分别表现为紊流与层流的形式,泥泵真空度、航速均与泥泵遗漏量呈正相关的分布趋势。In response to the problem of sediment leakage from the outflow field during the operation of the trailing suction dredger,we study the outer sediment flow characteristics of the rake head work process.By the numerical simulation method,we analyze the sediment leakage between the front and rear ends of the external flow field of the rake head,and the sediment concentration distribution in the external flow field under different working conditions,and obtain the effect of vacuum and velocity changes on the sediment distribution in the external flow field.The results show that the sediment leakage in the flow field behind the rake head is more serious in the external flow field.The leakages in the vertical and horizontal directions of the flow field are in the form of turbulent flow and laminar flow respectively.The vacuum degree and sailing speed are positively correlated with the leakage amount of the dredge pump.

关 键 词：耙吸挖泥船 流场分析 多相流 泥沙遗漏 

分 类 号：U615[交通运输工程—船舶及航道工程]