本文介绍一种采用光纤式高速摄影测量装置获取三维柱锥形冷态喷动床试验台内部气固两相流颗粒瞬时速度的测量方法、及其测量不确度的分析.基于获取的颗粒相运动视频,计算出颗粒瞬时速度、颗粒相速度和颗粒温度,它们分别用于表征测量区域中颗粒群流动的快慢和脉动的强弱.测量结果表明:镜头畸变校正环节是影响颗粒瞬时速度测量的主要因素,本测量装置的颗粒瞬时速度的测量不确定度为±2.383％;颗粒相速度在喷泉核心区(r/R≤0.2)为正,绝对值较大,沿半径方向减小到零,然后在r/R=0.45处转变方向并逐渐增大;颗粒温度在区域r/R≤0.2和r/R≥0.65变化显著,对应着喷动床内颗粒喷射上行和下落的主要区域,这证实了公开文献中喷动床内颗粒脉动动能分布的数值模拟结果.
参考文献
| [1] | Martin Olazar;Maria J. San Jose;Sonia Alvarez;Alberto Morales;Javier Bilbao .Measurement of Particle Velocities in Conical Spouted Beds Using an Optical Fiber Probe[J].Industrial & Engineering Chemistry Research,1998(11):4520-4527. |
| [2] | 李水清,姚强,赵香龙,郑义忠.喷动床内颗粒浓度的实验测量和理论模拟[J].工程热物理学报,2005(05):871-874. |
| [3] | Laverman JA;Roghair I;Annaland MV;Kuipers H .Investigation into the hydrodynamics of gas-solid fluidized beds using particle image velocimetry coupled with digital image analysis[J].The Canadian Journal of Chemical Engineering,2008(3):523-535. |
| [4] | S. Madhusudana Rao;Kewu Zhu;Chi-Hwa Wang;Sankaran Sundaresan .Electrical Capacitance Tomography Measurements on the Pneumatic Conveying of Solids[J].Industrial & Engineering Chemistry Research,2001(20):4216-4226. |
| [5] | S. Malcus;G. Chaplin;T. Pugsley .The hydrodynamics of the high-density bottom zone in a CFB riser analyzed by means of electrical capacitance tomography (ECT)[J].Chemical Engineering Science,2000(19):4129-4138. |
| [6] | 颗粒相运动参数的光纤式高速摄影测量方法[J].东南大学学报（自然科学版）,2012(05):910-914. |
| [7] | Balaji Gopalan;Franklin Shaffer.A new method for decomposition of high speed particle image velocimetry data[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2012:164-171. |
| [8] | Frank Shaffer;Balaji Gopalan;Ronald W. Breault.High speed imaging of particle flow fields in CFB risers[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2013:86-99. |
| [9] | Miyazaki Kaoru;Yamamoto Fujio;Ohta Jun-ichi;Murai Yuichi;Horii Kiyoshi;Chen Gang .PIV measurement of particle motion in spiral gas-solid two-phase flow[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,1999(4):194-203. |
| [10] | Jonghwun Jung;Dimitri Gidaspow;Isaac K.Gamwo .Measurement of Two Kinds of Granular Temperatures,Stresses,and Dispersion in Bubbling Beds[J].Industrial & Engineering Chemistry Research,2005(5):1329-1341. |
| [11] | Lu HL.;He YR.;Liu WT.;Ding JM.;Gidaspow D.;Bouillard J. .Computer simulations of gas-solid flow in spouted beds using kinetic-frictional stress model of granular flow[J].Chemical Engineering Science,2004(4):865-878. |
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