微细尺度下液体乙醇层流扩散火焰的特性分析  

Characteristic analysis of micro scale liquid ethanol laminar flow diffusion flame

作　　者：徐涛[1,2] 杨泽亮[1] 甘云华[1] 杨帅[1] 

机构地区：[1]华南理工大学电力学院,广州510640 [2]广州航海高等专科学校轮机系,广州510725

出　　处：《海军工程大学学报》2011年第2期36-41,共6页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(50806022);中央高校基本科研业务费专项资金资助项目(2009ZM0031)

摘　　要：采用Fluent 6.3软件对微细尺度下液体乙醇层流扩散燃烧过程进行了数值模拟,同时借用实验方法对其可靠性进行了验证。结果表明:实验获得的火焰结构与数值模拟温度图高温区结构相似,而且火焰结构尺寸比数值模拟要低,数值模拟值与实验计算值吻合良好;H/d与Re呈线性增加,有外加电场的斜率较无电场大,正向电场的H/d比反向电场大;W/d先随Re线性增加,后变化幅度较小,反向电场的W/d比正向电场和无电场大;火焰最高温度随Re线性增加,外加电场的斜率较无电场的斜率大。In order to analyze the characteristics of the micro scale liquid ethanol laminar flow diffusion flame, the liquid ethanol laminar flow diffusion combustion process was simulated numerically by using Fluent 6.3 software and meanwhile the reliability of numerical simulation was verified with the experimental method. The results show that the flame structure from the experiment is similar to that of the numerical simulation of high temperature region and that the size of the former structure is lower than that of the latter. The numerical simulation values of the flame in height and width are in good agreement with the experimental calculated values. H/d is mainly in linear relationship with Re and the gradient with an applied electric field is larger than the gradient with no electric field. H/d with the positive electric field is larger than that with the reverse electric field. W/d increases linearly with Re firstly and then the amplitude of variation is small. W/d with the reverse electric field is larger compared with the positive electric field and no electric field. The maximum temperature of flame increases linearly with Re, and the gradient with the applied electric field is larger than that with no applied electric field.

关 键 词：微细尺度 层流扩散 火焰结构 

分 类 号：TQ171[化学工程—玻璃工业]