摘要
利用Fluent6.3对水下航行体超空泡减阻进行了数值模拟,研究了水下航行体空泡形态和阻力系数的变化规律,分析了航行体的受力和减阻特性.结果表明,水下航行体在超空泡绕流时,压差阻力系数减小,摩擦阻力系数减小并趋于零,总阻力系数比无空泡绕流时大幅度降低,比流线型模型的也小;航行体的头部在超空泡绕流时承受了绝大部分阻力,尾段所受阻力减小至几乎为零;头部空化器直径增大,超空泡较易形成,但减阻能力降低,空化器直径过小,不能形成超空泡,不能有效减阻.
The drag reduction characteristic of the flow around underwater vehicle is simula-ted based on the homogeneous equilibrium theory by using commercial CFD Code Fluent 6.3. The drag coefficient change law , force condition and drag reduction characteristics of the ve-hicle were studied in this paper .When the supercavity forms around the vehicle , the pres-sure coefficient decreased , and the viscous drag coefficient almost decreased to zero .The to-tal drag coefficient decreases greatly compared with non -cavitating flow around vehicle and the streamlined ones .The head of vehicle bears almost all of the drag , and the drag beard by the latter of vehicle decreased almost to zero .The supercavitation forms easily as the cavita-tor diameter increased , but the drag reduction ability of supercavitation decreased .When the cavitator diameter was too small , the supercavitation can’t form, and the drag reduction characteristic of supercavitation was ineffective .
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2015年第5期609-613,共5页
Journal of Harbin University of Commerce：Natural Sciences Edition
基金
黑龙江省教育厅基金(12541676)
关键词
水下航行体
超空泡减阻
空泡形态
阻力特性
数值模拟
underwater vehicle
drag reduction of supercavity
cavity shape
drag characteristic
numerical simulation
