摘要
通过改变燃气量和一级空气量完成一系列燃烧工况。采用低成本的火焰检测装置采集得到各个工况火焰辐射的脉动信息,利用快速傅里叶变换算法将获得的时域信号衍生出频域上的功率谱信号。从时域信号的周期性能和频域信号中主峰频率的波动情况提取出反应火焰脉动性能的参数:火焰强度比方差和火焰闪烁频率,通过联合分析得到其随时间和燃烧状态变化的规律,实现对燃烧稳定性能的评判。
A series of combustion conditions by changing the performance of the fuel and one-step air provision have been completed.Power spectrum of frequency domain was derived from time domain signals based on fast fourier transform（FFT） with low-cost combustion detection device.Specific variance of flame intensity and flame flicker frequency responded flame fluctuation characteristics were extracted from cyclic behaviour of time domain and peak frequency of frequency domain signals.The regularities of specific variance of flame intensity and flame flicker frequency varying with time and combustion conditions were summarized by joint time frequency analysis,the evaluation on stability for flame combustion was realized.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2010年第4期39-44,共6页
Journal of North China Electric Power University：Natural Science Edition
基金
国家自然科学基金资助项目(50736002)
国家高技术研究发展计划项目(863)(2007AA05Z331)
关键词
燃烧稳定性
时频信号
闪烁频率
风燃比
快速傅里叶变换
combustion stability
time and frequency domain signals
flame flicker frequency
air/ fuel ratio
FFT
