锥头航行体非匀速垂直出水数值研究  

Numerical study of the submerged body with a conical head exiting from water vertically in non-uniform velocity

作　　者：张马骏 陈鑫[1,2] 鲁传敬[1,2] 

机构地区：[1]上海交通大学工程力学系,上海200240 [2]上海交通大学水动力学教育部重点实验室,上海200240

出　　处：《水动力学研究与进展（A辑）》2014年第6期683-690,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(11372185;11102110);上海市重点学科项目(B206)~~

摘　　要：在航行体高速出水过程中,空化现象不可避免,并会对航行体受到的载荷产生显著影响。该文采用数值模拟的方式,耦合VOF多相流模型和自然空泡模型,计算了不同加速度下锥头航行体垂直出水过程。通过肩部空泡体积与局部空化数的关系,将整个过程分为一次成长阶段、二次成长阶段和溃灭阶段,得到了二次成长阶段具有的准定常特征。分别给出了空泡外形在三个阶段中的变化过程,分析了速度、加速度和局部空化数对空泡发展过程以及航行体上压力分布的影响。During the water exit of a high-speed submerged body, cavitation is inevitable, which will affect the load on the submerged body significantly. This article uses the numerical method, coupling the VOF multiphase method and cavitation model, to simulate the vertical water exiting progress of a submerged body with a conical head in different acceleration. By the relationship of cavity volume with local cavitation number, the whole process can be divided into the stages of first growth, second growth and collapse. The quasi-steady feature in the stage of second growth is obtained. The variations of cavity shape in the three stages are given respectively. The effects of velocity, acceleration and local cavitation number on the cavitation development and the pressure distribution on the submerged body are analyzed.

关 键 词：空化 VOF方法 出水 锥头 

分 类 号：O352[理学—流体力学]