Abstract： To obtain the rotation characteristics of particles in bubbling fluidizing beds, the rotation process of particles in cold bubbling fluidizing beds was studied by a measurement system composed of a dual-frequency digital camera and a sheet laser. The results show that the average rotation speed increases with decrease of the particle size. There is a strong growing tendency for average rotation speed as the horizontal component of translational speed increases. The average particle rotation speed fluctuates when the vertical component velocity of particles increases. The particles with small vertical component speed generally show a slight decrease tendency than those with large vertical component speed. The average rotation speed of particles increases first and then decreases along x axis.

Keywords: bubbling fluidizing bed; gas-solid two phase fluid; particle; rotation; collision

中图分类号：TK121        文献标志码：A

文章编号：1008-5548（2014）04-0008-05

DOI:10.13732/j.issn.1008-5548.2014.04.002

收稿日期：2013-11-04， 修回日期：2013-11-12，在线出版时间：2014-08-28。

基金项目：中美清洁能源联合研究中心课题，编号：2010DFA72730。

第一作者简介：王勤辉(1970—) ，男，博士，教授，研究方向为煤及生物质的循环流化床燃烧和气化技术、 煤的热电气多联产技术、 污染物控制技术、热化学制氢技术以及气固多相流等。 E-mail: qhwang@zju.edu.cn。