A New Approach to Evaluate 3D Flow Fields Using an Off-Axis 2D PIV System: Investigation of a Tubular Reactor Equipped with Kenics Static Mixers

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Experimental Techniques Pub Date : 2023-02-24 DOI:10.1007/s40799-023-00631-7

Z. Yao, F. Alberini, G. Montante, A. Paglianti

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引用次数: 1

Abstract

In this work, an off-axis 2D Particle Image Velocimetry system is used to obtain the 3D flow field at the outlet of a tubular reactor equipped with Kenics static mixers. The 3D flow fields are obtained exploiting the out-of-plane velocity component and considering the symmetrical features of the flow generated by the static mixers. The raw results show that the velocity vectors, measured on a cross section perpendicular to the tube axis by 2D-PIV with the camera located at 24° from the measurement plane, are affected by the axial component of the flow. However, taking into account the symmetry of the flow field with respect to the tubular reactor axis and evaluating the effect of the out of plane velocity component, the correct 2D velocity vectors on the plane and also the velocity component in the axial direction can be calculated from the raw 2D PIV data. The consistency of the methodology is demonstrated by comparison of the results with the flow field measured in a smaller tubular reactor of similar geometry and Reynolds number with a symmetrical 2D-PIV system, with the camera located perpendicularly to the laser plane. Then, the 3D features of the flow are analyzed to characterize the effects of the different combinations of static mixer configurations on the fluid dynamics of the system in turbulent conditions. The results show that, as the pressure drop increases, a more uniform velocity distribution is achieved.

Graphical Abstract

Abstract Image

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一种利用离轴二维PIV系统评价三维流场的新方法——对装有Kenics静态混合器的管式反应器的研究

摘要:本文利用离轴二维粒子图像测速系统，获得了装有Kenics静态混合器的管式反应器出口的三维流场。利用面外速度分量，考虑静态混合器产生的流动的对称特征，得到了三维流场。原始结果表明，2D-PIV在垂直于管轴的横截面上测量的速度矢量受到流轴分量的影响，相机位于距测量平面24°的位置。然而，考虑到流场相对于管状反应器轴的对称性，并考虑到面外速度分量的影响，可以从原始的二维PIV数据中计算出正确的平面上的二维速度矢量和轴向的速度分量。将该方法的结果与具有相似几何形状和雷诺数的小型管状反应器的流场测量结果进行了比较，并与对称2D-PIV系统进行了比较，相机垂直于激光平面。然后，分析了流体的三维特征，表征了不同静态混合器配置组合对湍流条件下系统流体动力学的影响。结果表明，随着压降的增大，速度分布更加均匀。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experimental Techniques 工程技术-材料科学：表征与测试

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

5.2 months

期刊介绍： Experimental Techniques is a bimonthly interdisciplinary publication of the Society for Experimental Mechanics focusing on the development, application and tutorial of experimental mechanics techniques. The purpose for Experimental Techniques is to promote pedagogical, technical and practical advancements in experimental mechanics while supporting the Society''s mission and commitment to interdisciplinary application, research and development, education, and active promotion of experimental methods to: - Increase the knowledge of physical phenomena - Further the understanding of the behavior of materials, structures, and systems - Provide the necessary physical observations necessary to improve and assess new analytical and computational approaches.