| PENG Aiwu,ZHAO Lingzhi,CHEN Xiaoqiang,ZHANG Qingfan,SHA Ciwen,ZHAO Jianping,LI Ran,WANG Zhaolian. 2019. Investigation of the oil-seawater mixed flow under an electromagnetic field. Acta Oceanologica Sinica, 38(7):14－21 |
| Investigation of the oil-seawater mixed flow under an electromagnetic field |
| 电磁场作用下油水混合流流动特性研究 |
| Received:August 27, 2018 |
| DOI：10.1007/s13131-019-1454-4 |
| Key words:oil-seawater mixed flow electromagnetic field oil-seawater separation marine oil pollution |
| 中文关键词: 油水混合流 电磁场 油水分离 海洋油污染 |
| 基金项目:The Tianjin Science and Technology Plan Project under contract No. 15YFYSGX00010; the Tianjin Bureau of Marine Science and Technology Plan Project under contract No. KJXH2015-05. |
| Author Name | Affiliation | E-mail | | PENG Aiwu | Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China | | | ZHAO Lingzhi | Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China | zlz@mail.iee.ac.cn | | CHEN Xiaoqiang | Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China | | | ZHANG Qingfan | China Offshore Environmental Service Ltd., Tianjin 300457, China | | | SHA Ciwen | Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China | | | ZHAO Jianping | China Offshore Environmental Service Ltd., Tianjin 300457, China | | | LI Ran | Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China | | | WANG Zhaolian | Shandong Huate Magnetism Technology Co., Ltd., Linqu 262600, China | |
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| Abstract: |
| The electromagnetic separation method is a new approach to treat ship-based marine oily wastewater, in which oil droplets are dispersed in seawater (oil-seawater mixed flow). In order to clarify the separation process and determine the separation characteristics, the flow field and volume fraction of the oil droplets of the oil-seawater mixed flow under an applied electromagnetic field with different operating conditions were investigated by 2D numerical simulations with the Eulerian model. The results show that:(1) the downward Lorentz force causes seawater to flow downwards and the oil droplets to move upwards due to the electromagnetic separation force in the effective section of the separation channel; (2) the volume fraction of the oil droplets at the top of the outlet section increases with the current density, magnetic field, and the diameter of the oil droplet and decreases with the inlet velocity of the oily seawater. The results provide useful guidance for the design of electromagnetic separation devices of the oil-seawater mixed flow. |
| 中文摘要: |
| 电磁分离是处理海洋船舶油污水的一种新方法。为了明晰海洋船舶油污水电磁分离过程，获得油水分离特性，本文采用二维数值模拟和欧拉多相流模型，研究了电磁场作用下油水混合流的流场分布及油相体积分数的变化规律和影响因素。研究结果表明：1）分离通道有效段内，向下的电磁力（洛伦兹力）使海水向下流动，电磁分离力使油珠向上运动；2）分离通道出口上部油相的体积分数随电流密度、磁场强度以及油珠直径的增大而增大，随油污海水入口流速的增大而减小。研究结果为油水混合流电磁分离装置的设计提供了有益的指导。 |
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