哈尔滨工程大学学报Issue(9)：1060-1066,7.DOI:10.3969/j.issn.1006-7043.2013
不同头型弹体低速入水空泡试验研究
Experimental study of the cavity of low speed water entry of different head shape projectiles
摘要
Abstract
Experimental studies of the water entry of different head types of projectiles are conducted using high-speed photography to capture the cavity-running phase. The water entry of various head shaped projectiles, inclu-ding elliptical head and cone-shaped head (90°~150°), is recorded using a high-speed photography;the charac-teristics of the free surface, evolution of cavity and the trajectory stability of different head shapes are studied;the relationships of the vacuole, water ballistic, and the water-entry velocity and angle are analyzed. The experiments show that elliptical head projectiles can avoid cavity but would lose its trajectory stability. For a projectile with a cone-shaped head of 90° with a given entry angle, the cavity becomes more and more asymmetric as the entering speed increases. However, for a projectile with 120°cone-shaped head, the higher the vertical component of the en-try speed, the easier the closing-up phenomenon of cavity will occur and the integrated vacuole form. Using a 150° cone-shaped head projectile, the surface-closure occurs when the entry angle is greater than 80°. In the procedure of water entry, the speed of the projectile attenuates linearly and the speed of cavity water jet decreases quickly.关键词
弹体入水/头型/空泡/自由液面/入水参数/高速摄影/射流/空泡闭合Key words
projectile waterentry/head shape/cavity/free surface/water-entry parameter/high-speed photography/jet/cavity pinch-off分类
交通工程引用本文复制引用
杨衡,张阿漫,龚小超,姚熊亮..不同头型弹体低速入水空泡试验研究[J].哈尔滨工程大学学报,2014,(9):1060-1066,7.基金项目
国家自然科学基金资助项目（51009035；50939002）；黑龙江省自然科学基金资助项目（ A201406）；船舶预研支撑技术基金资助项目（13J1．5．1）． （）
