生物质叶丝颗粒流化状态与分布特性研究  

RESEARCH ON FLUIDIZATION STATE AND DISTRIBUTION CHARACTERISTICS OF FILAMENTOUS PARTICLES FROM BIOMASS MATERIAL

作　　者：耿凡[1] 安家俊 温恬靓 郭恒 李林林 Geng Fan;An Jiajun;Wen Tianliang;Guo Heng;Li Linlin(School of Low-Carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学低碳能源与动力工程学院,徐州221116

出　　处：《太阳能学报》2025年第4期612-618,共7页Acta Energiae Solaris Sinica

基　　金：徐州市基础研究计划(KC23050);国家自然科学基金青年项目(51506215)。

摘　　要：基于无根多体系统构建每一个颗粒,采用拉格朗日方法追踪颗粒与其颗粒段,考虑颗粒段之间的铰约束与碰撞效应,分析不同流化风速、颗粒长度等对颗粒流化状态的影响。研究发现:颗粒运动形态多样,呈现伸展、绕曲等多种形式,与流化实验过程中捕捉到的叶丝颗粒的状态近似。短颗粒易被流化带出,随着流化的进行,提升管内较短的颗粒(<0.03 m)数量百分比逐渐下降,甚至低于6%。流出颗粒的数量百分比随其长度的增加而下降;颗粒取向角呈现中间高、两头高的分布趋势;近壁区域颗粒多呈竖直/近竖直状态(±80°~±90°)。次中心区域水平状态(约0°)颗粒的数量百分比随流化的进行增长较为明显;随风速的增大,近壁区域中竖直/近竖直分布的颗粒量增加。Based on the rootless multi-body system,each particle is constructed.The Lagrange method is used to trace the particles and their segments.Considering the hinge constraints and collision effects between particle segments,the effects of different fluidization velocities and particle lengths on the fluidization state of particles are analyzed.The results indicate that the transient morphology of particles is diverse,during the fluidization,including stretching,winding and other forms,which is similar to the state of cut tobacco particles captured during the fluidization experiments.Short particles can be easily discharged by the air flow.As fluidization progresses,the percentage of the number of shorter particles(<0.03 m)in the riser gradually decreases,even less than 6%.The number percentage of the discharged particles decreases with the increase of their length,and the particle orientation angle shows a distribution trend of high in the middle and high at both ends.Most of the particles in the near-wall region are vertical or nearly vertical(plus or minus 80°-90°).The number percentage of particles with the horizontal state of the subcenter region(about 0°)increases significantly with the progress of fluidization.As the air velocity increases,the amount of vertical or nearly vertical particles increases in the near-wall region.

关 键 词：生物质 流态化 颗粒运动 多体系统 分布特征 流化状态 

分 类 号：TK6[动力工程及工程热物理—生物能]