Hydrodynamics of oil jets without and with dispersant: Experimental and numerical characterization
Hydrodynamics of oil jets without and with dispersant: Experimental and numerical characterization
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DOI：
10.1016/j.apor.2017.08.013
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发表时间：
2017-10-01
影响因子：
4.3
通讯作者：
Miller, R.
中科院分区：
文献类型：
--
作者：
Gao, F.;Zhao, L.;Miller, R.
在本文中，我们提出了分析的水下水平油射流的实验测量和计算流体动力学（CFD）使用雷诺平均Navier-Stokes（RANS）方程。进行了两次石油地下释放：一次是原油，另一次是原油与分散剂预混合，分散剂与石油的比例为1：20。射流剖面由中等分辨率的相机捕获，瞬时速度由Vectrino Profiler测量。实验得到的速度分量、湍流动能和湍流耗散率与采用k-ε湍流模型的CFD模拟结果吻合较好。实验测得无分散剂油和有分散剂油的射流扩散角分别约为21 °和24 °。后者接近于23 °处的可混溶射流的角度。加入分散剂后的油射流剖面浮力比未加分散剂的油射流剖面浮力小，这可能是由于加入分散剂后的油射流对水的卷吸作用较大。两种情况下的射流横截面随着距离的增加而逐渐变平，因为羽流转向向上。(C)2017爱思唯尔有限公司版权所有
In this paper, we present the analysis of an underwater horizontal oil jet experimental measurement and Computational Fluid Dynamics (CFD) using the Reynolds Averaged Navier Stokes (RANS) equations. Two oil subsurface releases were conducted: one with crude oil and another with crude oil premixed with dispersant at the dispersant to oil ratio (DOR) of 1:20. The jet profile was captured by a camera at moderate resolution, and the instantaneous velocity was measured by a Vectrino Profiler. The velocity components, turbulence kinetic energy, and turbulence dissipation rate from the experiment agreed well with those from the CFD simulation using the k-epsilon turbulence model. The spread angle of the jet was found to be around 21 and 24 from the experiment measurement, for oil without dispersant and oil with dispersant, respectively. The latter is close to the angle of miscible jets at 23. The jet profile of oil with dispersant had a smaller buoyancy than that without dispersant, which is probably due to the large water entrainment for the oil with dispersant jet. The cross sections of the jet for both cases gradually became flattened with distance, as the plume turned upward. (C) 2017 Elsevier Ltd. All rights reserved.