介绍了利用拉曼散射测量燃烧流场温度及组分浓度的物理方法和实验测量结果。利用可调谐的KrF准分子激光激发振动拉曼散射;VRS 测量了甲烷-空气燃烧火焰内不同空间的主要组分分子;CH₄、N₂、O₂、H₂O等 浓度及温度,测量误差小于10%;另外用N₂的拉曼谱拟合测量了火焰的温度,测量精度高于5%。在实验中采用了偏振技术及波长调谐提高了信噪比和测量精度。

Using a narrow-band tunable KrF excimer laser as a spontaneous vibrational Raman scattering ;SVRS source,spatially-resolved Raman scattering is used to measure the single shot concentrations of all major species ;N₂,O₂,H₂O,CH₄ in methane-air flames.A simple polarization technique and optimal tuning of the narrow-band KrF excimer laser are used for the minimization of OH and O₂ fluorescence interference to improve the precision.Moreover a time-averaged temperature measurement technique is presented to fit the N₂ spectrum to theoretical spectrum,by considering the fact that the Stokes spectrum of N₂ will broden and the peak wavelength will blue-shift when temperature increases.The spectral-fit precision is less than 5% at 1500 K.