基于功率谱的一种新型燃烧器燃烧状况识别  

Diagnosis on State of the Combustion for a New-type Burner Based on the Power Spectrum

作　　者：王春华[1] 王俊[1] 李玉强[1] 刘腾[1] 刘钰[1] 

机构地区：[1]湖南大学机械与汽车工程学院,湖南长沙410082

出　　处：《工业加热》2008年第6期35-38,共4页Industrial Heating

摘　　要：为有效地对新型燃烧器火焰燃烧状况进行识别,通过光电传感器获得一系列火焰光强信号,然后利用快速傅里叶变换(FFT)对火焰光强信号采样时间序列进行分析得出功率谱曲线,判断出非接触式的辐射式燃烧器燃烧状况稳定,进而得出了该种燃烧器燃烧孔开口大小及位置合理的结论。应用结果表明,燃烧火焰时域信号的采样频率至少要>1 000 Hz,稳定的火焰信号功率谱低频部分波动小,不稳定的火焰信号功率谱波动相对于稳定的要大很多。To diagnose the state offlame fi＇om a new-type burner, FFT has been used to calculate power spectntrn after series offlame-intensity signals has been sampled via optoelectronic sensor. The conclusion that size and location of the burning hole on the new burner is reasonable has been drawn by analyzing the time series acquired. The results illustrate that sampling frequency of flame-intensity signal should be at least 1 000 Hz, besides, the power spectrum of steady flame signals fluctuates less at low-frequency contracted to the power spectrum of unsteady signals.

关 键 词：燃烧诊断 燃烧火焰 快速傅里叶变换 功率谱 

分 类 号：TK16[动力工程及工程热物理—热能工程]