• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental and numerical research on the axial and radial concentration distribution feature of miscible fluid interfacial mixing process in products pipeline for industrial applications
【24h】

Experimental and numerical research on the axial and radial concentration distribution feature of miscible fluid interfacial mixing process in products pipeline for industrial applications

机译：工业应用产品管道中混相流体界面混合过程轴向和径向浓度分布特征的实验与数值研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

During the process of sequential transportation of miscible but dissimilar fluid (MBDF) in pipelines, the adjacent of different kinds of MBDF will be mixed, leading to form a section of a liquid mixed segment in the pipeline which is an important aspect of mass transfer, especially in the multiproduct pipeline. This paper represents an experimental study of sequential transportation of MBDF in a single pipeline and thereby a set of experimental loop platform for sequential transportation has been designed. Several dimensionless indices including mixed segment length, axial tailing length, and radial difference have been proposed to measure the concentration distribution in the mixed segment (CDMS) in both axial and radial directions of a pipeline. A novel numerical model to simulate the CDMS of MBDF transported in a pipeline is also proposed and solved, where the turbulence effect, the difference in physical properties of the front and tail fluid, and the adsorption effect are taken into account to investigate the diffusion coefficient and concentration distribution. The complex flow and mass transfer in transportation process can be observed in the experiment and the results illustrate that the concentration profile is asymmetrical respect to the 50% concentration point at different time and distance, which is not revealed in the solutions of existing both numerical theory and empirical formula. The simulated results figure out the radial and axial feature of CDMS and achieve a good agreement with the experimental length of the mixed segment. Thus, the tailing phenomenon is found, analyzed and simulated. Those mentioned-above 3 kinds of effects are considered to form the tailing phenomenon in CDMS interactively. The overall uncertainty of the proposed dimensionless parameters has also been analyzed. The results reveal that the length of the tail of the mixed segment (LTMS) is 22% longer than that of the front (LFMS) when taking the 5% change of concentration as the judging criteria. The detection probe located at the center of the pipe earliest detects the CDMS while the probe near the pipe wall does latest. The corresponding detection time difference is up to 25.64%. Finally, the research results can provide guidance for delivering the refined oils sequentially and cutting the mixed segment in the industrial pipelines. (C) 2018 Published by Elsevier Ltd.
机译：在管道中相继混合但互不相同的流体（MBDF）的顺序运输过程中，不同种类的MBDF的相邻部分将被混合，从而在管道中形成液体混合段的一部分，这是传质的重要方面，特别是在多产品管道中。本文代表了MBDF在单个管道中顺序运输的实验研究，从而设计了一套用于顺序运输的实验回路平台。已经提出了包括混合段长度，轴向拖尾长度和径向差在内的几个无量纲指标，以测量管道轴向和径向方向上混合段（CDMS）中的浓度分布。提出并求解了一种新的数值模型，用于模拟管道中MBDF的CDMS，其中考虑了湍流效应，前后流体物理性质的差异以及吸附效应来研究扩散系数。和浓度分布。在实验中可以观察到运输过程中复杂的流动和传质，结果表明，浓度曲线在不同的时间和距离相对于50％浓度点是不对称的，这在现有的两种数值理论的解决方案中都没有揭示。和经验公式。仿真结果表明了CDMS的径向和轴向特征，并与混合段的实验长度达到了很好的一致性。因此，发现，分析和模拟了拖尾现象。上面提到的三种效应被认为是在CDMS中交互形成拖尾现象。还分析了所提出的无量纲参数的总体不确定性。结果表明，以5％的浓度变化为判断标准，混合段尾部的长度（LTMS）比前部段的长度（LFMS）长22％。位于管道中心的检测探针最早检测到CDMS，而位于管道壁附近的探针检测最新的CDMS。相应的检测时间差高达25.64％。最后，研究结果可为依次输送精制油和削减工业管道中的混合段提供指导。 （C）2018由Elsevier Ltd.发布

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号