摘要
为研究空化的发生机理,对绕斜锥头型回转体分离涡空化特性进行了数值模拟,结果表明,当水流过斜锥头型回转体时,在其前部几何拐点处形成中心型的分离涡.研究中,将其简化为二维椭圆涡,并基于边界层和涡流动理论对涡内的流线和压力分布进行理论分析,获得了不同斜锥角下分离涡尺度与初生空化的关系,并进一步对绕斜锥头型回转体空泡内流场结构和空泡几何特征变化规律进行了分析.
The objective of the paper is to simulate the vortex cavitation around the revolution body with cone-shaped headforms.The numerical results show that when water flow around revolution body,the separate vortices formed at the geometry inflexion point.The separate vortices was simplified into two-dimension elliptic vortices in this paper,and the streamline and pressure distribution in the vortices were analyzed base on boundary layer and vortex flow theory,the relationship between the separation vortex and the cavitation inception was obtained.The flow structure and the geometrical characteristics of the cavitations were analyzed by numerical simulation when the cavity developed.
作者
孔德才
黄彪
魏海鹏
尤天庆
KONG De-cai;HUANG Biao;WEI Hai-peng;YOU Tian-qing(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China)
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2018年第9期921-926,共6页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(51209004)
关键词
斜锥头型
旋涡分离
空化
cone-shaped headforms
vortex structures
cavitation
