摘要
本文用高速摄像机拍摄乙烯扩散火焰图像,探究了空气伴流、O_2/N_2富氧气氛伴流和O_2/CO_2富氧气氛伴流三种情况下的火焰脉动特性。通过对图像处理分析可知,氧化剂伴流会抑制火焰脉动。随着伴流流量的增加,一方面火焰脉动频率增加,最后稳定在某一特定值上;另一方面火焰可见形状波动范围减小。基于上述分析,拟合并给出了伴流流量与脉动频率的关系。
The paper obtained images of ethylene diffusion flames by a high-speed camera and stud- ied flickering characteristics of co-flow air, oxygen-enriched O2/N2 atmosphere and oxygen-enriched O2/CO2 atmosphere. Through image process and analysis, it was observed that co-flow oxidizer may suppress flame flickering. With the increase of co-flow oxidizer rate, on the one side, the dominant flickering frequency will increase and then stay in a specific value, on the other side, the flame oscillating magnitude will decrease. Based on the analysis above, the relationship between co-flow oxidizer rate and flickering frequency are fitted and given.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2015年第7期1590-1595,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51176059)
中央高校基本科研业务费(No.2014ZZGH003)
关键词
高速摄像机
乙烯扩散火焰
脉动频率
high-speed camera
ethylene diffusion flame
flickering frequency
