双喷嘴射流冲坑的几何相似性研究  

Geometrical Similarity of Double Nozzle Jet Scour Hole

作　　者：李振升[1,2] 倪福生[1,2] 顾磊[1,2] 李雯[1,2] 

机构地区：[1]河海大学机电工程学院,江苏常州213022 [2]疏浚教育部工程研究中心,江苏常州213022

出　　处：《机械设计与制造工程》2016年第1期82-85,共4页Machine Design and Manufacturing Engineering

摘　　要：高压水射流在耙吸式挖泥船中具有重要的作用,可极大地提高破土冲砂的挖掘效率。采用实验与数值模拟相结合的方法对双喷嘴射流冲刷砂床形成的坑型进行研究,中值粒径d50=1.8mm,固定靶距并恒定流速,在不同的喷嘴间距下进行射流冲刷研究。结果显示,实验结果与数值模拟的冲坑形状基本一致,左右坑形状可以用同一条曲线来描述,即冲坑形状具有几何相似性。High pressure water jet has an important role in the trailing suction dredger, and greatly improves the efficiency of mining sand ground. In this paper, the experimental and numerical simulation method is used to study the formation of a double nozzle jet scouring sand bed. With the median particle size d50 = 1.8mm, fixed target distance and constant velocity, the jet is washed with different nozzle spacing. The results show that the experiment results and numerical simulation are basically consistent. The shape of the left and right can be de- scribed by the same curve, and the shape of the crater has a geometrical similarity.

关 键 词：挖泥船 双喷嘴 射流冲刷 数值模拟 几何相似性 实验 

分 类 号：TV134[水利工程—水力学及河流动力学]