基于动网格和UDF技术的假底流场特性分析  

Analysis of False Bottom Flow Field Characteristics Based on Dynamic Grid and UDF Technology

作　　者：王茜雯 张轶 张宗辉 WANG Qianwen;ZHANG Yi;ZHANG Zonghui(Shanghai Marine Equipment Research Institute,Shanghai 200031,China)

机构地区：[1]上海船舶设备研究所,上海200031

出　　处：《机电设备》2024年第5期107-111,共5页Mechanical and Electrical Equipment

摘　　要：可升降假底作为海洋工程水池重要组成部分,其主要作用是模拟海底平面,根据实验要求模拟不同海况下的海底深度。为研究可升降假底上升过程中的流场特性,采用动网格技术对假底在静水中上升过程中的流场进行计算,结果表明:应用动网格技术以及用户自定义函数(UDF)程序成功实现了假底在水池中上升时的运动状态。假底在水池中上升经历加速-匀速的过程,在上升的过程中,会挤压流体,流体进入假底与水池壁面之间缝隙时流速明显变快,流场发生剧烈变化,进而使得假底上方湍流强度增加。为海洋工程水池假底的设计、优化以及假底系统的模型试验工作提供参考依据。As an important part of the marine engineering pool,the liftable false bottom is mainly used to simulate the seabed plane and the seabed depth under different sea conditions according to the experimental requirements.In order to study the characteristics of the flow field during the rise of the liftable false bottom,the dynamic grid technology is used to calculate the flow field during the rise of the false bottom in still water.The results shows that the motion state of the false bottom is successfully realized by using the dynamic grid technology and user defined function(UDF)program.The rise of the false bottom in the pool experienced a process of acceleration and uniform velocity.When the false bottom is rising,it will squeeze the fluid,and when the fluid enters the gap between the false bottom and the pool wall,the flow velocity becomes significantly faster,and the flow field changes dramatically,thus increasing the turbulence intensity above the false bottom.It provides a reference for the design and optimization of the false bottom of the ocean engineering pool and the model test of the false bottom system.

关 键 词：动网格和用户自定义函数(UDF)技术 可升降假底 流场特性 

分 类 号：TB21[一般工业技术—工程设计测绘]