【摘要】 采用紫外相机和增强型光谱仪对乙醇燃料液雾旋流火焰的自由基化学发光特性开展了实验研究，针对化学发光峰值强度位于310 nm、431 nm、516 nm波段的OH^*、CH^*、C^*₂三种自由基，基于自由基发光强度建立了液雾旋流火焰参数表征模型，同时研究了不同自由基组合（OH^*/CH^*、OH^*/C^*₂、CH^*/C^*₂）的化学发光强度比值与火焰当量比、释热率的对应关系。研究发现，在不同气流出口速度下，OH^*、CH^*、C^*₂三种自由基化学发光强度与当量比、释热率具有较好的线性关系，其中自由基组合中OH^*/C^*₂化学发光强度比值与火焰参数相关性最高，可以用于液雾旋流火焰的当量比、释热率等参数测量与表征。更多还原

【Abstract】 Experiments of the free radical chemiluminescence properties of ethanol-fueled spray swirling flame are carried out through an UV camera and an enhanced spectrometer. The effect of free radical chemiluminescence on the spray swirling flame structural characteristics, equivalence ratio and heat release rate are investigated. A model for characterizing the parameters of the spray swirling flame based on the chemiluminescence intensities of the radicals has been established by OH^*, CH^*, and C^*₂ at 310 nm, 431 nm, and 516 nm bands. The relationships between the chemiluminescence intensity ratios of various radical combinations（OH^*/CH^*, OH^*/C^*₂, CH^*/C^*₂）, and the equivalence ratios and heat release rates are analyzed and characterized. Results show that the chemiluminescence intensities of OH*, CH*, and C₂* radicals exhibit a significant linear correlation with the equivalence ratios and heat release rates under diverse gas flow velocities The intensity ratio of OH^*/C^*₂ chemiluminescence in radical combinations exist the strongest correlation with flame parameters and is capable of characterizing the equivalence ratio and heat release rate of spray swirling flames.更多还原