鼓泡流化床气固两相流动特性数值模拟  

Numerical Simulation of Gas-solid Two-phase Flow Characteristics in Bubbling Fluidized Bed

作　　者：李九如[1] 李铭坤 陈巨辉[1] LI Jiu-ru;LI Ming-kun;CHEN Ju-hui(School of Mechanical and Power Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学机械动力工程学院

出　　处：《哈尔滨理工大学学报》2019年第4期47-52,共6页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(51406045);黑龙江省自然科学基金(E201441);黑龙江省大学生创新创业训练计划项目(201610214078)

摘　　要：为了研究鼓泡流化床内气固两相流动特性,采用数值模拟的方法,对Fushimi等人的冷态实验过程进行模拟,建立了合理的TBCFB气化炉气固两相流动系统模型,基于欧拉双流体模型,以ANSYS嵌套的FLUENT17.0,作为数值模拟计算的基础平台,模拟TBCFB(三级流化床)气化炉系统中鼓泡流化床气固两相流动过程及分析其流动特性。结果主要分为3部分:鼓泡床表观速度对流动质量有重要影响,速度越低,越有利于床内气泡与床料充分接触;比较不同高度,不同配比两种颗粒温度变化特点,发现床层高度越高,颗粒温度越大;颗粒浓度增加,其颗粒温度降低,反之增加。In order to study the gas-solid two-phase flow characteristics in bubbling fluidized bed reactor,the numerical simulation method,the Fushimi,to simulate the process of cold experiments,we set up reasonable TBCFB gasifier model of gas-solid two-phase flow,based on eulerian two-fluid model,nested FLUENT17.0 with ANSYS,as the basis of numerical simulation platform,the simulation TBCFB(level 3 fluidized bed gasifier bubbling fluidized bed gas-solid two-phase flow in the system process and analyze the flow characteristics.The results are mainly divided into three parts:the surface velocity of the bubbling bed has an important influence on the flow quality,and the lower the speed,the more favorable the bubbles in the bed are in contact with the bed material.It is found that the higher the height of the bed is,the higher the particle temperature is.The particle concentration increases,the particle temperature decreases,and vice versa.

关 键 词：鼓泡流化床 双流体模型 气固两相流 数值模拟 

分 类 号：TK[动力工程及工程热物理]