摘要
超空泡航行器运动在超空化流动模式下,流场内涉及固、液、气3种介质,空泡与航行器相互耦合作用极为复杂。文中给出了超空泡航行器减阻特性、非线性、非定常与不确定性、流体惯性力较小4种典型流体动力特性,揭示了超空泡航行状态下航行器的流体力学本质。通过仿真计算,得到了空泡外形随空化数、攻角、舵角的变化趋势,利用计算流体力学(CFD)方法计算给定外形航行器在超空泡流型下的受力情况,分析了航行器流体动力特性变化,并给出了影响其变化的相关因素。该研究可为超空泡航行器动力学建模和弹道计算提供参考。
In the mode of supercavitation, the flow field of an underwater vehicle involves three types of media- solid, liquid and gas, and the inter-coupling effect of cavity and vehicle is extremely complicated. In this paper, four typical characteristics of fluid dynamics of a supercavity vehicle, i.e. resistance reduction characteristic, nonlinear, un- steady and uncertain, and smaller fluid inertia force, are summarized, and the nature of fluid dynamics for an underwater vehicle in supercavitation is revealed. The cavity shapes are simulated with the changes of cavitation number, angle of attack, and angle of rudder. The method of computational fluid dynamics（CFD） is used to calculate the forces on a su- percavity vehicle with given shape under different conditions. The changes of hydrodynamic characteristics of the ve- hicle, as well as the relevant influencing factors, are analyzed.
出处
《鱼雷技术》
2015年第4期262-268,共7页
Torpedo Technology
