采用正交各向热异性壁面材料提升微通道火焰稳定性的数值模拟研究  

Numerical Simulation Study on Enhanced Micro-flame Stabilization using Thermally Orthotropic Combustor Wall Materials

作　　者：田坤[1] 康鑫 TIAN Kun;KANG Xin(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan,China,Post Code:430063;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan,China,Post Code:430070)

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063 [2]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《热能动力工程》2022年第9期114-119,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51806158)。

摘　　要：为深入分析不同壁面导热率对微尺度燃烧器稳燃性能的影响,使用基于OpenFOAM框架开发的低马赫数反应流求解器,并结合DRM-19化学反应机理对正交各向热异性的微型平行平板内甲烷/空气预混火焰稳定性开展了数值模拟。模拟结果表明:相比于各向热同性壁面材料,正交各向热异性材料能够显著提升壁面对通道上游附近未燃气体的预热作用,同时减少燃烧器向外界环境的热损失,可达到提高火焰吹出极限的效果。In order to analyze the influence of different wall thermal conductivity on the combustion stability of micro-scale burner,premixed methane/air flame stabilization in a parallel plate micro-combustor made of thermally orthotropic wall materials is numerically studied using a low-Mach number,reacting flow solver based on the OpenFOAM Framework,along with the DRM-19 reaction mechanism.Results indicate that as compared to the isotropic combustor walls,the use of the thermally orthotropic walls could effectively enhance the preheating to fresh mixture,as well as reduce heat losses to the ambient,thereby leading to a larger flame blow-off limit.

关 键 词：微尺度燃烧 壁面正交各向热异性 火焰稳定性 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]