Laminar Flame Instability of n-Hexane,n-Octane,and n-Decane in Spherical Expanding Flames  

作　　者：YIN Geyuan HU Erjiang LI Xiaotian LV Xin HUANG Zuohua 

机构地区：[1]State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an,710049,China [2]United Automotive Electronic Systems Co.,Ltd,Shanghai,201206,China [3]Chongqing Changan Automobile Co.,Ltd.,Chongqing,401120,China

出　　处：《Journal of Thermal Science》2024年第3期1189-1199,共11页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(52106182,51888103);the National Science and Technology Major Project(2019-Ⅲ-0018-0062);supported by the State Key Laboratory of Clean Energy Utilization(Open Fund Project No.ZJUCEU2021016);Shaanxi Nature Science Foundation(No.2021JQ-265)。

摘　　要：This paper focuses on the laminar flame instability of three high molecular weight n-alkanes,namely n-hexane,n-octane,and n-decane.The experiment was carried out in a constant volume combustion bomb to get the flame images.The critical radius under different conditions was extracted using the image processing program.Combined with the existing critical Peclet number theory,the dominant factors of flame instability under current conditions for three n-alkanes can be figured out.Moreover,the average cell size(equivalent cell radius,R_(cell))was extracted to provide quantitative analysis of the flame cellular structure,based on the method developed in this work.The theoretical R_(cell)were also calculated and compared with the experimental results to validate the proposed method.

关 键 词：cellular instability equivalent cell radius critical Peclet number spherical flame 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]