摘要
本文基于OpenFoam平台开发的非线性大涡模拟-部分搅拌反应器(NLES-PaSR)模型,对FSP湍流喷雾燃烧火焰进行LES模拟,并首次发展了高效的多维群平衡蒙特卡洛(PBMC)方法,对FSP过程中ZrO_(2)纳米颗粒的时空演化过程进行描述。结果表明,FSP是一个剧烈的强湍流燃烧过程,在周围稳燃火焰的影响下,其火焰温度具有两个峰值,且三种动力学事件的发生速率均在第一个温度峰值(HAB=0.012 m)达到最大。随着颗粒在火焰中的迁移及停留时间的增加,颗粒粒径逐渐增大。三种动力学事件之间的相互竞争关系以及颗粒在流场中的迁移行为,共同影响着火焰中颗粒尺寸、形态的演变。
In the present work,the LES turbulent spray combustion simulation in Flame Spray Pyrolysis(FSP)burner was carried out by open source OpenFOAM based on the gradient-type structural Subgrid-scale(SGS)model and partially stirred reactor(PaSR)combustion model(NLESPaSR).Meanwhile,an efficient multi-dimensional PBMC method was for the first time applied to describe the spatiotemporally-resolved formation and growth of nanoparticles in the FSP.The results show that the FSP is a strong turbulent combustion process.The temperature presents a bimodal distribution under the support of the surrounding pilot flame,and the rates of the three dynamic events reach the maximum all at the first temperature peak(HAB=0.012 m).The size of the nanoparticles increases gradually with the particle transport and increasing residence time.The competition among the three dynamic events,as well as the particles transport in the flame affect the evolution of particles.
作者
何松
苏志晶
徐祖伟
鲁昊
赵海波
HE Song;SU Zhijing;XU Zuwei;LU Hao;ZHAO Haibo(State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China;School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2023年第3期696-702,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金国际(地区)重点合作项目(No.51920105009)。
