Abstract
A physical model test has been conducted to study the oil diffusion from the submarine pipeline under water flow. The crude oil in the flume is spilled from a leakage point of the pipeline and diffused from the seabed to the surface. By the non-contact optical measuring technology, an image acquisition and data analysis system is designed to explore the spilled mechanism and characteristic. The oil trajectory, velocity and the rising time to the surface are obtained through this system. The influence of the water flow and the spilled discharge on the behavior of the spilled oil are analyzed from both qualitative and quantitative perspectives. The sensitivity study of the characteristic physical quantities to various factors are presented afterward. The spilled oil under water is mainly distributed in the form of the scattered particles with different sizes. The rising process of the oil can be divided into three stages: full, dispersion and aggregation period. The spilled discharge is the primary factor affecting the rising time of the oil particles. In the rising process of the oil particles, the vertical velocity of the oil is mainly affected by the spilled discharge, and the transverse velocity is more dependent on the water velocity. The deviation of the transverse oil velocity is much larger than that of the rising time and the vertical oil velocity. The study can provide a theoretical reference for the prediction system of oil spill emergency.
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The authors acknowledge the constructive and valuable comments and suggestions of the reviewer and the editor. The major part of the present paper was presented at IOSRTS 2017, Tianjin, China, September 18–22, 2017.
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Foundation item: The National Natural Science Foundation of China under contract No. 51609168; the Science and Technology Program of CNOOC Limited under contract No. YXKY-2016-2Y-07; the Open Fund of State Key Laboratory of Coastal and Offshore Engineering under contract No. LP1608; the National Basic Research Program (973 Program) of China under contract No. 2014CB046804; the National Science and Technology Major Project under contract No. 2016ZX05057020.
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Jiang, M., Yu, J., Li, Z. et al. Laboratory investigation into the oil diffusion from submarine pipeline under water flow. Acta Oceanol. Sin. 37, 96–103 (2018). https://doi.org/10.1007/s13131-018-1257-6
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DOI: https://doi.org/10.1007/s13131-018-1257-6