管道预混火焰动态响应的分析和测量  

Measurement and Analysis of Dynamic Response of Premixed Ducted Flames

作　　者：张彤枫[1] 唐豪杰[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084

出　　处：《燃烧科学与技术》2011年第6期521-526,共6页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB210106)

摘　　要：基于线性扰动假设对管道预混火焰的动态响应进行了理论分析,推导得到了正弦扰动下火焰面脉动时域表达式.同时利用增强型电荷耦合器和动态压力传感器对管道预混火焰形状周期性变化过程进行相同步测量,研究了当量比和扰动频率对火焰面脉动的影响规律.理论分析和实验测量的结果一致,表明上述物理量的改变会直接影响火焰面脉动的褶皱数和褶皱振幅.The dynamic response of premixed ducted flame to flow disturbance is analyzed in this paper. For linear fluctuations, the time evolution of flame surface can be determined analytically. Meanwhile, the influence of different equivalence ratio and forced oscillation frequencies on the fluctuation of flame wrinkle is measured by intensified CCD detectors and dynamic pressure sensors simultaneously with the help of the phase-locked method. Both the analytical and the experimental results show that the above parameters are closely related to the number and amplitude of flame wrinkle.

关 键 词：管道预混火焰 火焰面褶皱 线性扰动分析 动态测量 

分 类 号：TK16[动力工程及工程热物理—热能工程]