摘要
基于均质平衡流理论,利用Fluent 6.3对水下钝体空化绕流进行数值模拟,研究钝体空泡形态的变化规律,分析钝体的减阻特性。结果表明:空化数较小时,钝体从水绕流发展成空化绕流,随着空化数减小,空泡的无量纲直径和无量纲长度都增大;压差阻力系数减小,摩擦阻力系数减小并趋于0,总阻力系数比水绕流时降低,基本等于压差阻力系数。
The flow around underwater bluff body is simulated based on the homogeneous equilibrium theory using Fluent 6.3.Change laws of bluff body’s cavity shape and drag reduction characteristics of bluff body are studied in this paper.Results show that water flow will develop into cavitation flow around a bluff body when cavitation number is smaller,and dimensionless diameter and dimensionless length of cavity will increase with decreasing of cavitation number.When pressure drag coefficients decrease, frictional drag coefficient will decrease and go to zero.And total resistance coefficient is lower than water flow around,almost equal to pressure drag coefficient.
出处
《黑龙江工程学院学报》
CAS
2015年第3期40-44,共5页
Journal of Heilongjiang Institute of Technology
基金
黑龙江省教育厅基金资助项目(12541676)
黑龙江工程学院博士基金项目(2011BJ07)
关键词
流体力学
钝体绕流
空泡形态
阻力特性
数值模拟
fluid mechanics
flow around bluff body
cavity shape
drag characteristic
numerical simula-tion
