摘要
为探究跨介质飞潜器水面起降过程流场结构演变及自身运动特性,基于计算流体动力学数值仿真技术,耦合流体体积多相流模型、剪切应力传输k-ω湍流模型、Schnerr-Sauer空化模型以及Stokes 5阶非线性波理论,构建了飞潜器水面起降的数值计算方法。分别对静水环境下飞潜器水面起飞过程、有/无波浪环境下飞潜器水面降落过程进行数值仿真,分析了各过程飞潜器动力学响应、载荷变化情况以及自由液面流场演化过程。结果表明:在整个静水环境下水面起飞过程中飞潜器均能保持稳定的姿态,其周围流场结构及自由液面演化均具有强对称性;在水面降落过程中,飞潜器及导管底部受到较大的反向砰击力,导致飞潜器姿态出现一定程度的振荡,在经过多次衰减波动后能够快速恢复平稳状态;而波浪的存在会加大触水时刻飞潜器所受到的砰击载荷,加剧飞潜器姿态的振荡,延后姿态最终恢复平稳时间。
In order to explore the evolution of the flow field structure and motion characteristics of the trans-medium submersible during the take-off and landing on water surface,the volume of fluid(VOF)multiphase flow model,the shear stress transfer(SST)k-ωturbulence model,the Schnerr-Sauer cavitation model,and the Stokes fifth-order nonlinear wave theory were coupled to construct a numerical calculation method for the submersible during take-off and landing on water surface based on the numerical simulation technology of computational fluid dynamic(CFD).The take-off of the submersible on water surface in the static water environment,as well as its landing on water surface in the presence or absence of the wave was numerically simulated.The dynamic response,load change of the submersible,and the evolution of the flow field on free liquid surface in each process were analyzed.The results show that the submersible can maintain a stable attitude during the whole take-off process on water surface in a static water environment,and the flow field structure and free liquid surface evolution around it have strong symmetry.In the process of landing on water surface,the bottom of the submersible and the fairing are subjected to a large reverse attack force,making the submersible fluctuate to a certain extent,but it can quickly restore the steady state after several attenuation fluctuations.The existence of the wave will increase the attack load applied to the submersible at the moment of touching the water,aggravate the attitude fluctuation of the submersible,and delay the final recovery time of the attitude.
作者
陆德顺
张少谦
王浩宇
孙铁志
LU Deshun;ZHANG Shaoqian;WANG Haoyu;SUN Tiezhi(School of Naval Architecture&Ocean Engineering,State Key Laboratory of Structural Analysis,Optimization and CAES of tware for Industrial Equipment,Dalian University of Technology,Dalian 116024,China)
出处
《水下无人系统学报》
2024年第3期434-450,共17页
Journal of Unmanned Undersea Systems
基金
基础科研项目资助(JCKY2022110C018).
关键词
跨介质飞潜器
水面起降
动力学
砰击载荷
trans-medium submersible
take-off and landing on water surface
dynamic
attack load
