摘要
用数码录像方法对颗粒的轴向速度和径向位置进行了测量,获得了单个颗粒在垂直管流中的速度分布。考虑到非球形颗粒和羧甲基纤维素(CMC)溶液的非牛顿性,对有关文献中颗粒阻力系数计算的关系式做了修正。理论计算结果与实验滑移速度比较表明,在靠近管道轴线的径向位置模型的计算与实验结果很接近。同时,讨论了颗粒尺寸和流体流量对颗粒速度分布的影响。
The paper describes experimental results on particle velocity profiles obtained for single particle flows through vertical pipes(up-flow). A video recording technique has been used to determine both the particle axial velocity and the radial position of the particles. And the slip velocity for single particles has been compared with predicted values, using literature correlations modified to take into account the non -spherical shape of the particles and the non - Newtonian behavior of the CMC dolutions. The predicted values were in general very close to experimental values. The effect of flow rate and particle size on the particle velocity profiles was also discussed in this paper.
出处
《黑龙江科技学院学报》
CAS
2003年第2期15-19,共5页
Journal of Heilongjiang Institute of Science and Technology
关键词
颗粒
液固两相流
食品加工
滑移速度
particle
solid -liquid flow
food processing
slip velocity
