纳米颗粒团聚物流化特性的数值研究  

NUMERICAL STUDY OF FLOW BEHAVIOR OF FLUIDIZED AGGLOMERATES OF NANO-SIZE PARTICLES

作　　者：刘欢鹏[1] 何玉荣[1] 陆慧林[1] 赵云华[1] 尹丽洁[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2005年第z1期125-128,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50376013No.20490200)

摘　　要：基于气固两相流体动力学理论,建立气体纳米颗粒团聚物两相流动双流体模型。模型中采用了Jung&Gidaspow(2002)测量的固相应力模量和王垚等(2001)提出的聚团曳力系数计算模型。对纳米颗粒团聚物的流化过程进行了数值模拟,得到纳米颗粒团聚物的流化特性。模拟得出的床层膨胀比与文献中实验的结果较为接近。A two-fluid hydrodynamic model was used to simulate the fluidized agglomerates of nano-size particles based on theory of gas-solid two-phase flow in the fluidized bed. A measured solids phase modulus proposed by Jung and Gidaspow (2002) and the corrected drag force formulation considering the effect of particle agglomeration proposed by Yao et al. (2001) were used in the model. The fluidizing behavior of agglomerates of nano-size particles, and the distributions of concentration and velocity of fluidized agglomerates were predicted. The computed bed expansion ratio was closely matched the measured data in the literature.

关 键 词：纳米颗粒团聚物 双流体模型 流化特性 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]