液化气扩散火焰的分形结构特征  

Fractal Structure Characteristics of LPG Diffuse Flame

作　　者：董志[1] 梁钦锋[1] 台培杰[1] 刘海峰 

机构地区：[1]华东理工大学洁净煤技术研究所,上海200237

出　　处：《华东理工大学学报（自然科学版）》2010年第1期31-35,共5页Journal of East China University of Science and Technology

基　　金：国家重点基础研究发展规划(973项目)(2004CB217703);教育部"长江学者与创新团队发展计划"创新团队项目(IRT0620)

摘　　要：基于图像处理方法和分型理论研究了液化气扩散火焰边缘分形结构特征。沿火焰轴向将火焰均分为5个区域,研究火焰边缘分形维数沿火焰轴向的变化,通过改变中心通道氧气速度,研究火焰长度、分形维数与过氧系数的关系。研究结果表明:随着过氧系数的增大,火焰长度逐渐缩短;火焰波动范围也减小,从喷嘴到火焰末端分形维数先减小后增大,并且变化范围不大。The fractal structure of LPG diffusion fire edge was theoretically studied on the basis of image processing and fractal theory. Each flame image was divided into five zones in the axial direction and the variation of the fire edge fractal dimension was axially analyzed. The relationships of flame length, fractal dimension and overall equivalence ratio were also investigated by changing the oxygen flow rate. The results show that both the length and the fluctuation range of flame gradually decrease with the increasing of peroxy coefficient, while the fractal dimension from the nozzle to the end of the flame decreases first and then increases within small range.

关 键 词：扩散火焰 IMAGEJ 分形维数 过氧系数 

分 类 号：TQ054[化学工程]