| LI Jianwei,AN Wei,GAO Huiwang,ZHAO Yupeng,SUN Yonggen. 2018. An experimental study on oil droplet size distribution in subsurface oil releases. Acta Oceanologica Sinica, 37(11):88－95 |
| An experimental study on oil droplet size distribution in subsurface oil releases |
| 水下溢油油滴粒径分布实验研究 |
| Received:May 07, 2018 |
| DOI：10.1007/s13131-018-1258-5 |
| Key words:oil droplet size distribution subsurface oil releases Rosin-Rammler distribution |
| 中文关键词: 油滴粒径分布 水下溢油 罗辛-拉姆勒分布 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | LI Jianwei | Key Laboratory of Marine Environment and Ecology, Ministry of Education of China, Ocean University of China, Qingdao 266100, China
China Offshore Environmental Services Ltd., Tianjin 300452, China | | | AN Wei | China Offshore Environmental Services Ltd., Tianjin 300452, China | anwei2@cnooc.com.cn | | GAO Huiwang | Key Laboratory of Marine Environment and Ecology, Ministry of Education of China, Ocean University of China, Qingdao 266100, China | | | ZHAO Yupeng | China Offshore Environmental Services Ltd., Tianjin 300452, China | | | SUN Yonggen | The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | sunyonggen@126.com |
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| Abstract: |
| Oil droplet size distribution (ODSD) plays a critical role in the rising velocity and transport of oil droplets in subsurface oil releases. In this paper, subsurface oil release experiments were conducted to study ODSD under different experimental conditions in a laboratory water tank observed by two high-speed cameras in March and April 2017. The correlation formulas Oh=10.2Re-1 and Oh=39.2Re-1 (Re represents Reynolds number and Oh represents Ohnesorge number) were established to distinguish the boundaries of the three instability regimes in dimensionless space based on the experimental results. The oil droplet sizes from the experimental data showed an excellent match to the Rosin-Rammler distribution function with determination coefficients ranging from 0.86 to 1.00 for Lvda 10-1 oil. This paper also explored the influence factors on and change rules of oil droplet size. The volume median diameter d50 decreased steadily with increasing jet velocity, and a sharp decrease occurred in the laminar-breakup regime. At Weber numbers (We) < 100, the orifice diameter and oil viscosity appeared to have a large influence on the mean droplet diameter. At 100 < We < 1 000, the oil viscosity appeared to have a larger influence on the relative mean droplet diameter. |
| 中文摘要: |
| 在水下溢油过程中，油滴粒径分布对油滴的上升速度和输运起着关键性作用。本文在实验水槽中开展了不同条件下的水下溢油模拟实验，并通过两台高速摄像机实时观测研究油滴粒径分布规律。实验结果表明：建立的无量纲方程Oh=10.2Re-1和Oh=39.2Re-1是划分三种不稳定流态的边界线，水下油滴粒径分布与罗辛-拉姆勒分布有较好的相关性，对于旅大10-1原油而言相关系数在0.86-1.00之间变化。同时，本文探究了油滴粒径分布的影响因素，体积中值粒径随着喷射速度增加而变小，在层流态会发生明显的下降；当韦伯数小于100时，喷口直径和原油粘度对平均粒径有较大的影响，当100<韦伯数<1000时，原油粘度对平均粒径的影响更大。 |
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