空气动力学学报2024，Vol.42Issue(1)：100-112,13.DOI:10.7638/kqdlxxb-2023.0191
自由面碎冰浮冰环境高速入水动力学特性
Dynamic characteristics of high-speed water entry in the environment of free water surface with crushed ice
摘要
Abstract
In order to study the characteristics of vehicle water entry at high speed in the fragmented ice environment,such as the evolution of cavitation flow field,vehicle dynamic response and ice breaking load characteristics,a coupled computational model of fluid-structure interaction for high-speed water entry of the vehicle in fragmented ice environment was established based on the Arbitrary Lagrangian-Eulerian method(ALE).The high-speed water entry process of a round-nosed vehicle was investigated through experiments and numerical calculations,validating the effectiveness of the high-speed water entry computational method.By comparing the results of the three-point bending test of the ice material with the numerical results,the reliability of the ice material model used in the calculations was verified.Using the constructed coupled computational model of fluid-structure interaction,the high-speed water entry process of a vehicle in a fragmented ice environment was studied and analyzed.The research focused on the effects of fragmented ice and the gaps between ice fragments on the flow field,dynamic parameters,and loads during the water entry process of the vehicle.The results show that the presence of fragmented ice has an inhibitory effect on the water surface lift and the evolution of splashing after the water entry of the vehicle.In the fragmented ice environment,the impact load on the vehicle during water entry significantly increases,and the process involves greater kinetic energy loss compared to a non-ice environment.However,the duration of the slamming load is consistent with water entry in a non-ice environment.The continuity of the splash crown formed during water entry increases with an increase in the gaps between ice fragments.Within a certain range of ice gaps,the instantaneous slamming load on the vehicle shows a negative correlation with the size of the gap.When the gap is sufficiently large,the variation in the slamming load becomes relatively small.关键词
流固耦合/任意拉格朗日-欧拉方法/碎冰环境/高速入水/数值模拟Key words
fluid structure interaction/ALE method/fragmented ice environment/high-speed water entry/numerical simulation分类
数理科学引用本文复制引用
张润东,段金雄,孙铁志,张桂勇..自由面碎冰浮冰环境高速入水动力学特性[J].空气动力学学报,2024,42(1):100-112,13.基金项目
国家自然科学基金(52071062,52192692,52325108) （52071062,52192692,52325108）
