【摘要】 用平面激光诱导荧光（ＰＬＩＦ）技术测量了平面火焰炉、狭缝火焰炉的单脉冲激光诱导ＯＨ荧光。由平面荧光图可得到氢氧基相对浓度分布和它的宽度。对扩散火焰，高温区在ＯＨ带内侧；ＯＨ带的外侧则是火焰的边界，相干反斯托克斯拉曼光谱（ＣＡＲＳ）的测量结果对此提出了有力的佐证。湍流火焰的ＰＬＩＦ图则清晰地显示出火焰面的不规则性。氢氧基的ＰＬＩＦ图像是研究火焰结构和流场的有力工具。更多还原

【Abstract】 The fluorescence of hydroxyl radicals(OH) in flames was detected in flat and slit flame burners by planar laser-induced fluorescence(PLIF) techniqUe with single laser pulse. The relative concentration distribution and width of OH radicals can be obtained from planar fluorescence images. For diffusion flames, the high temperature region is located at the inner side of OH zone, whereas the flame boundary is at its outer border. The coherent anti - Stokes Raman spectroscopic measurement(CARS) provides a convincing evidence for this conclusion. PLIF imaging of turbulence flame displays clearly the irregularity of flame surface. PLIF imaging technique provides a powerful implement for the investigation of flame structure and flow field.更多还原