| 水下局部干法焊接圆形排水罩的流体仿真分析 |
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| 引用本文： | 李兰,薛龙,黄军芬,黄继强.水下局部干法焊接圆形排水罩的流体仿真分析[J].焊接学报,2016,37(2):43-46,107. |
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| 作者姓名： | 李兰 薛龙 黄军芬 黄继强 |
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| 作者单位： | 1.北京石油化工学院 光机电装备技术北京市重点实验室, 北京 102617;北京化工大学 机电工程学院, 北京 100029 |
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| 基金项目： | 国家自然科学基金资助项目(51275051)，北京市教育委员会2015年度创新能力提升计划项目(TJSHG201510017023) |
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| 摘 要： | 对于水下局部干法焊接,其局部排水装置的排水效果及装置内流体湍流状态决定了焊接过程的稳定性,是影响焊接质量的关键因素之一. 以圆形排水罩结构作为局部排水装置进行研究,基于流体力学,利用FLUENT软件进行模拟仿真,探索圆形排水罩的排水过程,分析不同的进气方式和排水方式对罩内相分布的影响,以及对工件表面流体湍流状态的影响. 并将模拟仿真的排水过程与试验进行对比,验证仿真的准确性. 结果表明,模拟仿真与实际排水过程演变趋势基本一致,模拟仿真结果具有一定的可信度. 通过对比分析,确定合理的排水罩进气和排水方式,为局部水下焊接的稳定性提供基础数据.
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| 关 键 词： | 水下局部干法焊接 圆形排水罩 多相流 |
| 收稿时间： | 2015/7/10 0:00:00 |
Simulation of fluid in cylindrical drainage cover for underwater local dry welding |
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| LI Lan,XUE Long,HUANG Junfen and HUANG Jiqiang.Simulation of fluid in cylindrical drainage cover for underwater local dry welding[J].Transactions of The China Welding Institution,2016,37(2):43-46,107. |
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| Authors: | LI Lan XUE Long HUANG Junfen and HUANG Jiqiang |
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| Affiliation: | 1.Beijing Key Laboratory of Opto-Mechatronic Equipment Technology, Beijing Institute of Petro-chemical Technology, Beijing 102617, China;College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China2.Beijing Key Laboratory of Opto-Mechatronic Equipment Technology, Beijing Institute of Petro-chemical Technology, Beijing 102617, China |
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| Abstract: | In underwater local dry welding, the stability of welding procedure is determined by the drainage effect of local drainage device and the turbulence state of fluid in the device, which are two key factors that affect the welding quality. A local drainage device with a cylindrical drain cover structure was developed. Based on fluid mechanics, the simulation was carried out with software FLUENT to explore the drainage process in a circular drainage cover. The influences of different air inlet modes and drainage modes on the phase distribution in the cover and the turbulence state of fluid on the workpiece surface were analyzed. The accuracy of simulation was verified by comparing the simulated drainage process with the experimental one. The results show that the simulated drainage process was consistent with the actual process. Through comparative analysis, the reasonable air inlet and drainage modes for the cylindrical drain cover were determined, and the fundamental data for the stability of underwater local dry welding were provided. |
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| Keywords: | underwater local dry welding cylindrical drainage cover multiphase flow |
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