旋转球倾斜入水空泡演变和运动特性数值模拟  

Numerical simulation on cavity evolution and motion Characteristics for oblique water entry of a rotation sphere

作　　者：周波[1,2] 刘辉[1,2] 王杰[1,2] 韩晓双 ZHOU Bo;LIU Hui;WANG Jie;HAN Xiaoshuang(School of Naval Architecture Engineering,Dalian University of Technology,Dalian 116024,Liaoning China;State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,Liaoning China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,Liaoning China;Marine Engineering College,Dalian Maritime University,Dalian 116026,Liaoning China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024 [3]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [4]大连海事大学轮机工程学院,辽宁大连116026

出　　处：《华中科技大学学报（自然科学版）》2020年第10期92-98,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：辽宁省自然科学基金指导计划资助项目(20180550186);辽宁省兴辽英才计划资助项目(XLYC1807190);大连理工大学海岸和近海工程国家重点实验室开放课题基金资助项目(LP1906)。

摘　　要：为研究不同旋转方向对恒定转速球体倾斜入水过程中空泡动力学和运动特性的影响,基于雷诺时均方法的SSTk-ω(剪切应力传输模型)涡粘性模型,以及动态流体相互作用叠加旋转运动和重叠网格技术对低弗劳德数条件下球体入水过程进行了三维数值模拟研究,并利用入水试验系统和高速摄像技术验证了数值仿真结果的可靠性.计算结果表明:马格努斯效应使球体两侧产生压力差和横向力,使空泡发展方向和尺寸、闭合时间点、空腔及射流的姿态随旋转轴而变化;球体绕不同轴旋转倾斜入水时的运动受力特性差异显著.To analyze the effects of constant rotation under various rotating axes on the cavity dynamics and motion characteristics for oblique water entry of a sphere,the three-dimensional numerical simulation of the sphere water entry process under low Froude number was investigated based on the SST k-ω(shear stress transfer)eddy viscosity model in the Reynolds average Navier-Stokes(RANS)and the dynamic fluid body interaction(DFBI)superposed rotation motion and overlapping grid technique.The reliability of numerical model was verified by the entry experimental system and high-speed camera technology.The numerical results show that the Magnus effect causes pressure difference and lateral force on both sides of the sphere,so that the development direction,the closure times and the size of the cavity,and the shapes of the jet change with the rotation axis.The motion characteristics for oblique water entry of a sphere rotating around various axes are completely different.

关 键 词：球体倾斜入水 多轴旋转 多相流场 空泡动力学 运动特性 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]