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孔板对水槽内流场影响规律
林日亿1,2, 郭彬1, 李晓辰1, 徐伟栋1, 唐振1
作者单位
林日亿1,2, 郭彬1, 李晓辰1, 徐伟栋1, 唐振1 1. 中国石油大学储运与建筑工程学院, 山东青岛 266580
2. 中国石油大学山东省油气储运安全省级重点实验室, 山东青岛 266580 
摘要:
为了在室内试验台上模拟海洋海流横向冲刷海洋立管,采用水槽内加孔板结构模拟海洋平流。为获取稳定、均匀的平流场,利用FLUENT软件进行水槽内孔板均流流场数值模拟,选用标准κ-ε紊流模型分析孔板孔径、厚度、位置及布置层数等因素对孔板后流场的影响,并优化孔板结构。结果表明:未安装孔板时,在整个水槽内出现射流且有扩散的趋势,但射流并不能带动水槽内全部流体,仅有部分流体有速度,在水槽上、下两端会有漩涡及回流产生,速度分布不均匀。布置3块厚度为0.2 m的孔板且板与板之间的间隔为0.3 m,按照第块板距离进口截面0.2 m布置且中间孔孔径设计为0.03 m时能够获得较为合理的均匀流场。
关键词:  孔板  数值模拟  计算流体力学  均匀流场
DOI:10.3969/j.issn.1673-5005.2017.06.019
分类号:
基金项目:"十三五"国家科技重大专项(2016ZX05012-002-005);中央高校基本科研业务费专项(15CX05002A)
Influence laws of pore plates on basin internal flow field
LIN Riyi1,2, GUO Bin1, LI Xiaochen1, XU Weidong1, TANG Zhen1
Abstract:
In order to simulate the situation how the vertical tube is washed by the seawater inside the tube, this study is aimed to simulate the ocean advection by using the pore plate structure in a flume.To obtain the stable and uniform velocity field, the FLUENT software is used to simulate the stable velocity field by using the pore plate structure in a flume. The standard κ-ε turbulent model is adopted to analyze the pore diameter, thickness, position and arrangement layers of the pore plate, then the structure of the pore plate is optimized. The simulation results show that, when the orifice plate is not installed, there is a trend of jet and diffusion in the whole tank, but the jet does not drive all the fluid in the tank. Only part of the fluid has the velocity, in the water tank, the lower end has whirlpool and reflux generation, and the velocity distribution is not uniform. It is more favorable to obtain the uniform flow field with three pore plates whose thickness is 0.2 m, where the interval between them is 0.3 m,the first pore plate is set to 0.2 m away from the inlet, and the diameter of the hole on the first pore plate is set to 0.03 m.
Key words:  pore plate  numerical simulation  computational fluid mechanics  uniform flow field
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