92号汽油燃烧初期火焰光谱特征研究

Study on Flame Spectral Characteristics of Initial Combustion of No.92 Gasoline

为丰富油料火灾探测机理研究,自主搭建油料燃烧模拟实验台架,排除自然光线背景光谱等的影响后,使用光谱测量装置对油池中92号汽油燃烧火焰发射光谱数据进行采集,得到92号汽油燃烧初期火焰光谱.对 92 号汽油燃烧发射光谱进行频域分析、时域分析以及特征参数分析,得出其燃烧火焰发射光谱的相关性质:在380~780 nm可见光波段,光谱强度较强,随反应的进行强度逐渐增大,随波长增大强度呈上升趋势,存在较多明显的特征谱峰,可以作为粗略检测92号汽油燃烧火焰辐射强度的特征区域.200~1 100 nm的整个波段内,初步可将光谱强度相对较大、特征峰值较易辨识的431、512、516、547、589、766、769、928、933 nm作为92号汽油燃烧火焰识别的标志波长.

In order to enrich the mechanism research of oil fire detection,the oil combustion simulation experiment bench was built independently in this paper.After the influence of natural light background spectrum was excluded,the spectral measurement device was used to collect the flame emission spectrum data of No.92 gasoline in the oil pool,and the initial flame spectrum of No.92 gasoline was collected.In the 380-780 nm visible band,the intensity of the spectrum was relatively strong.As the reaction proceeded,the intensity gradually increased,and the intensity also increased as the wavelength increased.The spectral intensity took up the main part of the flame spectral radiation,and there were many obvious characteristic peaks,which was used as a characteristic area for roughly detecting the flame radiation intensity of No.92 gasoline.In combination with the radiation energy and time domain analysis in the spectral band,it was pointed out that the development stage of flame spectra radiation was mainly the process of pyrolysis and oxidation of small molecule hydrocarbon.In the whole band of 200~1 100 nm,431,512,516,547,589,766,769,928 and 933 nm with relatively large spectral intensity and relatively easy identification of characteristic peak value can be preliminarily used as the signal wavelength of flame recognition for No.92 gasoline combustion.