侧方扰动下圆柱体异步并列入水试验  

Experiment of Asynchronous Parallel Water-entry Process of Cylinders under Side Disturbance

作　　者：张鹤 魏英杰[1] 王聪[1] 路丽睿 樊继壮[2] ZHANG He;WEI Yingjie;WANG Cong;LU Lirui;FAN Jizhuang(Harbin Institute of Technology,College of Astronautics,Harbin 150001,China;Harbin Institute of Technology,State Key Laboratory of Robotics and System,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]哈尔滨工业大学机器人技术与系统国家重点实验室,哈尔滨150001

出　　处：《船舶工程》2020年第9期142-148,共7页Ship Engineering

基　　金：国家科技重大专项(04专项)。

摘　　要：为研究圆柱体低速并列入水时的空泡演化特性,基于高速摄像方法开展圆柱体单独入水和异步并列入水试验研究。通过对比得到侧方扰动下并列双空泡的演化规律,分析入水时差对不同闭合方式空泡演化的影响。试验结果表明:侧方扰动的主要表现为次发圆柱体空泡对首发圆柱体空泡排挤,侧方扰动对首发圆柱体的影响远大于次发圆柱体,且在入水时差较小的情况下次发圆柱体会使首发圆柱体空泡的喷溅薄膜提前回卷;并列圆柱体入水时差的改变会对空泡闭合、空泡形态和回射流特征等产生较大的影响。In order to study the cavitation evolution characteristics on parallel water-entry process of cylinders,based on the high-speed camera method,the experiment of single water-entry and parallel water-entry to cylinders at low-speed is carried out.The evolution law of parallel double cavitation under side disturbance is obtained by comparison,and the influence of water-entry time difference on different closed ways of cavitation is analyzed.The experimental results show that the main performance of the side disturbance is the cavity formed by the secondary cylinder will crowd out the cavity formed by the first cylinder.Its effect on primary cavity is higher than secondary cavity,and the secondary cylinder will rewind the splash film of the primary cavity in advance.The change of the time difference of parallel cylinders on water-entry can make some impact on the bubble closure,the shape of the bubble,and the characteristics of the re-entrant jet.

关 键 词：并列入水 侧方扰动 异步入水 空泡演化 入水时差 

分 类 号：TV131.22[水利工程—水力学及河流动力学]