辐射模型和弥散效应对多孔介质内燃烧影响的数值模拟  

NUMERICAL STUDY OF RADIATION MODEL AND DIFFUSION EFFECTS ON COMBUSTION IN POROUS MEDIA

作　　者：高怀斌[1] 屈治国[1] 陶文铨[1] 卢天健[2] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049 [2]西安交通大学强度与振动教育部重点实验室,陕西西安710049

出　　处：《工程热物理学报》2010年第2期321-323,共3页Journal of Engineering Thermophysics

基　　金：国家重大基础研究发展计划(No.2006CB601203);国家自然科学基金(No.50806057;No.10632060);国家高技术研究发展计划(No.2006AA03Z519);国家"111"引智计划(No.B06024)

摘　　要：本文根据气固两相局部非热平衡假设,建立了甲烷/空气预混气在惰性多孔介质内的一维层流燃烧数学模型。分别采用附加导热、Rossland模型和二通量法模型求解固体能量方程中的辐射源项,研究了热辐射模型和弥散效应对多孔介质内燃烧火焰结构的影响。结果表明,多孔固体表面辐射的影响不可忽略,辐射模型对火焰温度的预测影响显著,而弥散效应对气体温度的分布及反应热影响则较小。One-dimensional mathematical model of laminar combustion in porous media is established based on non-thermal balance hypothesis between solid and gas.The additional heat conduction model,the Rossland model and the two-flux method are employed to determine the radiation sources in the governing energy equation for the solid.The effects of thermal radiation and diffusion on the structure of flames in porous media are quantified.It is established that thermal radiation of the porous solid surface is not negligible.the type of thermal radiation model has significant effect on the predicted distribution of flame temperature,and diffusion has relatively small effect upon flame temperature distribution.

关 键 词：辐射模型 弥散效应 多孔介质 预混燃烧 

分 类 号：TK124[动力工程及工程热物理—工程热物理]