Experimental Investigation of Single-phase Flow in Structured Packing by LDV  

作　　者：陈江波 刘春江 李莹珂 黄莹 袁希钢 余国琮 

机构地区：[1]State Key Laboratory of Chemical Engineering,Chemical Engineering Research Center,Tianjin University,Tianjin 300072,China

出　　处：《Chinese Journal of Chemical Engineering》2007年第6期821-827,共7页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （No.20476072）.

摘　　要：To date, many models have been developed to calculate the flow field in the structured packing by the computational fluid dynamics （CFD） technique, but little experimental work has been carried out to serve the vali-dation of flow simulation. In this work, the velocity profiles of single-phase flow in structured packing are measured at the Reynolds numbers of 20.0, 55.7 and 520.1, using the laser Doppler velocimetry （LDV）. The time-averaged and instantaneous velocities of three components are obtained simultaneously. The CFD simulation is also carried out to numerically predict the velocity distribution within the structured packing. Comparison shows that the flow pattern, velocity distribution and turbulent kinetic energy （for turbulent flow） on the horizontal plane predicted by CFD simulation are in good agreement with the LDV measured data. The values of the x-and z-velocity components are quantitatively well predicted over the plane in the center of the packing, but the predicted y-component is sig-nificantly smaller than the experimental data. It can be concluded that experimental measurement is important for further improvement of CFD model.迄今为止，许多模型被开发了在由计算液体动力学(CFD ) 收拾行李组织计算流动地技术，而是很少试验性的工作被执行了服务流动模拟的确认。在这个工作，在收拾行李组织的单相的流动的速度侧面在 20.0， 55.7 和 520.1 的雷纳兹数字被测量，用激光 Doppler velocimetry (LDV ) 。三个部件的平均时间、即时的速度同时被获得。CFD 模拟也被执行数字地在组织收拾行李以内预言速度分发。比较表演流动模式，速度分发和狂暴的动能(为狂暴的流动) 在 CFD 预言的水平飞机上，模拟在对 LDV 的好同意测量数据。x 的值 -- 并且 z 速度部件是很好在收拾行李的中心在飞机上预言的份量上，但是预言的 y 部件比试验性的数据显著地小。试验性的测量为 CFD 模型的进一步的改进是重要的，这能被结束。

关 键 词：velocity profile structured packing laser Doppler velocimetry computational fluid dynamics 

分 类 号：O35[理学—流体力学]