汤亮,叶方平,龚发云,郭卫林,徐显金,姚元军

• 1:湖北工业大学机械工程学院
• 2:重组烟叶应用湖北省重点实验室

摘要(Abstract)：

考虑液固两相间耦合作用,采用欧拉-欧拉双流体模型,运用RNGk-ε模型和速度-压力耦合的SIMPLE算法求解粘性项的方法来模拟流化床中液固两相流动的特性,评估了曳力模型的适用性,研究了流化床的床层流动特性、液体不同物性和操作条件下对两相流动的影响.模拟仿真中发现:RNGk-ε模型比标准k-ε模型计算更为精确,运用不同的曳力系数模型会对计算结果造成重要影响,其中曳力模型Syamlal-O’Brien比Gidaspow更适用流化床中液固耦合特性的研究;惰性颗粒的速度会随着液体粘度参数的增大而增大,而且惰性粒子在流化床中心处速度最大即惰性粒子在流化床中心的沉降速度最慢;液体密度参数的增大会导致惰性粒子速度增大;惰性粒子的体积分数的改变也会影响颗粒的速度分布,且不成线性关系.

关键词(KeyWords)： 流化床;液固耦合;曳力模型;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 湖北省自然科学基金项目(编号:2012FFA059);; 武汉大学水力机械过渡过程教育部重点实验室开放基金项目(2015)

作者(Author): 汤亮,叶方平,龚发云,郭卫林,徐显金,姚元军

DOI: 10.14188/j.1671-8844.2016-01-021

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