Measuring turbulence in a circulating fluidized bed using PIV techniques

查看全文 作　　者：Mayank [1]Kashyap;Benjapon [2,3]Chalermsinsuwan;Dimitri [1]Gidaspow

机构地区：[1]Department of Chemical and Biological Engineering, Illinois Institute of Technology;[2]Fuel Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University;[3]Center of Excellence for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University

出　　处：《Particuology》索引2011年第9卷第6期,共17页

基　　金：support by the U.S. Department of Energy (DOE) University Grant(DE-FG26-06NT42736) 摘　　要：This study utilized the particle image velocimetry (PIV) technique, non-invasively near the wall, in the developing region, for the measurements of laminar and turbulent properties during circulation of Geldart B type particles in the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) riser. A novel method was used to measure axial and radial laminar and turbulent solids dispersion coefficients using autocorrelation technique. The instantaneous and hydrodynamic velocities for the solid phase were measured simultaneously in the axial and radial directions using a CCD camera, with the help of a colored rotating transparency. The measured properties, such as laminar and Reynolds stresses, laminar and turbulent granular tempera- tures, laminar and turbulent dispersion coefficients and energy spectra exhibited anisotropy. The mixing in the riser was on the level of clusters. The total granular temperatures were in reasonable agreement with the literature values. However, the axial and radial solids dispersion coefficients measured near the wall were slightly lower than the radially averaged values in the literature. 关键词：流体速度测量 PIV技术循环流化床国家能源技术实验室径向平均值粒子图像测速湍流特性颗粒温度

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Measuring turbulence in a circulating fluidized bed using PIV techniques

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