摘要
基于三维大涡模拟(LES)方法,使用FLUENT软件模拟开闸式异重流与水平双圆柱的相互作用。首先将异重流头部位置的数值仿真结果与实验数据进行了对比,验证所采用数值方法的准确性。在此基础上,对开闸式异重流的时空演化过程进行了分析。保持圆柱中心距不变,分析了圆柱底部间隙变化对结构荷载的影响。研究表明:圆柱结构的存在使得异重流的流动变得更加复杂,圆柱迎流一侧产生了大量的涡旋结构。圆柱上的阻力对底部间隙变化更为敏感,间隙变化对升力的影响主要体现在异重流冲击结构过后升力的波动阶段。
Based on the three-dimensional large eddy simulation(LES)method,the interaction of the lock-exchange gravity current with a horizontal double cylinder is simulated using FLUENT software.The numerical simulation results at the head position of the gravity currents are firstly compared with the experimental data to verify the accuracy of the numerical method used in this paper.On this basis,the spatio-temporal evolution process of gravity currents is analyzed.Keeping the center distance of the cylinder′s constant,the effect of the variation of the gap at the bottom of the cylinders on the structural loads is analyzed.It is shown that the presence of the cylindrical structure makes the flow of the gravity current more complicated,and a large number of vortex structures are generated on the headward side of the cylinder.The drag force on the cylinder is more sensitive to the change of the bottom clearance,and the effect of the clearance change on the lift force is main ly reflected in the fluctuation stage of lift force after the impact of gravity current flow on the structure.
作者
蔡涛
孙宏月
李慧敏
丁伟业
牟迪
CAI Tao;SUN Hongyue;LI Huimin(School of Naval Architecture and Maritime of Zhejiang Ocean University,Zhoushan 316022;School of Marine Engineering Equipment of Zhejiang Ocean University,Zhoushan 316022,China)
出处
《浙江海洋大学学报（自然科学版）》
CAS
2024年第4期346-351,共6页
Journal of Zhejiang Ocean University：Natural Science
基金
国家自然科学基金项目(52171278)
舟山市科技计划项目(2022C41008)。
