Experimental investigation on the multiphase flow characteristics of oblique water entry of the hollow cylinders

被引：22

作者：

Liu, Hui ^{[1
]}

Zhou, Bo ^{[1
]}

Yu, Jiawei ^{[1
]}

Liu, Kaihua ^{[1
]}

Han, Xiaoshuang ^{[1
,2
]}

Zhang, Guiyong ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Naval Architecture Engn, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Dalian Province, Peoples R China

[2] Dalian Maritime Univ, Marine Engn Coll, Dalian 116026, Dalian Province, Peoples R China

来源：

OCEAN ENGINEERING | 2023年 / 272卷

基金：

中国国家自然科学基金;

关键词：

Oblique water entry; Hollow cylinder; Cavity evolution; Through-hole jet flow; Multiphase flow characteristics; IMPACT;

D O I：

10.1016/j.oceaneng.2023.113902

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

The oblique water entry of the hollow cylinders with various inner diameters has been investigated experi-mentally. The multiphase flow characteristics of the cavity, through-hole jet and multiscale bubbles have been revealed and discussed. In the experimental setup, a high-speed photography technique is used to capture the process of water entry based on digital video images. The results show that the fluid flows to the inside and outside of the hollow cylinder along the flow separation position, the through-hole jet and cavity are formed. The deep closure mode of the cavity pinched off by line contact appears, the upper cavity moves upward and the secondary jet is formed, and the lower cavity presents the evolution process of stable transparent surface, fluctuating rippling surface, blurry broken surface and collapse. Three bubble clusters are formed due to the closure and pinching off of the cavity, the breaking up of the through-hole jet, and the blurry broken evolution of the lower cavity, and are shedding upward along the moving paths of the upper cavity, the tail and the head of the hollow cylinder, respectively. Moreover, a parametric study is conducted on the effects of inner diameters on the multiphase flow structure and dynamic characteristics.

引用

页数：12

共 48 条

[1] PRESSURE MEASUREMENTS IN WATER-ENTRY CAVITY [J].