基于重叠网格的航行体水动力特性计算  

Calculation of hydrodynamic characteristics of vehicles based on overlapping grids

作　　者：韩守根 杨岩 刘丙鑫 陶钢[1] HAN Shougen;YANG Yan;LIU Bingxin;TAO Gang(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京理工大学能源与动力工程学院,南京210094 [2]南京航空航天大学直升机传动技术重点实验室,南京210016

出　　处：《兵器装备工程学报》2023年第1期54-58,167,共6页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金面上项目(51975280)。

摘　　要：利用重叠网格技术结合实验方法,研究了航行体跨界质过程中的阻力来源。将试验结果与仿真结果进行对比,得出该过程中的水动力及水动力系数变化趋势以及原因,结果表明:航行体在水下速度由25 m/s下降到9.7 m/s,水动力以及系数在航行体即将出水时刻达到最大值,分别为0.65 kN和0.184。出水过程水动力及力系数主要受水冢现象、浮力变化以及附连水质量变化影响而呈现波动并逐渐趋向于零,粘滞力是航行体完全出水后主要的流体阻力来源。该研究为水航行体减阻设计提供了参考依据。The source of drag in the crossing boundary process of a vehicle is studied by using overlapping mesh technique and experimental methods.By comparing the experimental results with the simulation results,the variation trend of hydrodynamic force and hydrodynamic coefficients in the process and the reasons for the variation are obtained.The results show that the underwater velocity of the vehicle decreases from 25 m/s to 9.7 m/s,and the hydrodynamic force and coefficients reach the maximum when the vehicle is about to leave water,which are 0.65 kN and 0.184 respectively.The hydrodynamic force and force coefficients fluctuate and gradually tend to be zero in the process of coming out of water,which are mainly affected by water mound phenomenon,change of buoyancy and change of the mass of the attached water.Viscous force is the main source of fluid resistance after the vehicle completely comes out of water.The research provides reference for drag reduction design of underwater vehicles.

关 键 词：流体动力 多相流 重叠网格 阻力计算 数值模拟 

分 类 号：TJ013.2[兵器科学与技术—兵器发射理论与技术]