基于Euler-Lagrange法的铝粉燃烧火焰传播数值模拟  

Numerical simulation of flame propagation of aluminum powder combustion based on Euler-Lagrange method

作　　者：李仁亮 刘小芳 LI Ren-liang;LIU Xiao-fang

机构地区：[1]安徽工业大学能源与环境学院,安徽马鞍山243000

出　　处：《节能》2024年第11期64-68,共5页Energy Conservation

摘　　要：采用开源计算流体力学程序OpenFOAM,在欧拉-拉格朗日框架下,建立铝粉燃烧模型。该模型考虑相间换热、相变、非均相表面反应、蒸发、气相反应等过程。比较管状火焰的模拟结果与实验数据,详细分析管状火焰传播过程中的火焰结构,对不同粒径的微米级铝颗粒进行模拟。结果显示,该模型预测火焰速度的能力较好。火焰速度对氧气浓度具有更高的敏感性,在富氧条件下,火焰速度随着当量比的增加而增加;在贫氧条件下,火焰速度几乎保持恒定。微米级铝颗粒的粒径增大导致火焰速度降低和火焰厚度增加。The open-source computational fluid dynamics program OpenFOAM was used to establish a combustion model of aluminum powder within the Euler-Lagrangian framework.This model considers processes such as interphase heat transfer,phase change,heterogeneous surface reactions,evaporation,and gas-phase reactions.The simulation results of the tubular flame are compared with experimental data,and a detailed analysis of the flame structure during the propagation of the tubular flame is conducted,simulating micrometer-sized aluminum particles of different particle sizes.The results show that the model has a good ability to predict flame speed.The flame speed is more sensitive to oxygen concentration,increasing with the increase of equivalence ratio under oxygen-rich conditions;under oxygen-lean conditions,the flame speed remains almost constant.An increase in the particle size of micrometer-sized aluminum particles leads to a decrease in flame speed and an increase in flame thickness.

关 键 词：铝燃烧 火焰速度 非均相反应 粉尘燃烧 火焰结构 

分 类 号：TG146.21[一般工业技术—材料科学与工程]