Thermochemical interaction – represented by CO mole fraction and gas phase temperature measurements – between flame and cooling air is investigated in a close-to-reality effusion-cooled single sector model gas turbine combustor. To investigate the influence of effusion cooling air mass flow on the thermochemical state, a parametric study is conducted. Temperature measurements are performed using ro-vibrational N${}_2$ coherent anti-Stokes Raman spectroscopy (CARS). CO mole fraction is measured by means of quantitative CO two-photon laser-induced fluorescence (CO-LIF) using a temperature dependent calibration acquired in an adiabatic pressurized laminar flame. Significantly different thermochemical states are observed in the inner and outer shear layer of the swirl stabilized flame. Within the primary zone, increasing cooling air mass flow leads to decreased CO concentrations. Close to the effusion cooled liner, the interaction varies with axial coordinate. In the outer recirculation zone, increased CO mole fractions were measured with increasing cooling air mass flow, indicating occurrence of chemical quenching in the late oxidation branch in the CO-T diagram. Further downstream, processes are dominated by mixing and CO concentrations decrease with the amount of supplied effusion cooling air. To our best knowledge, this is the first time that these effects has been shown experimentally.

在接近真实排放冷却的单扇型燃气轮机燃烧室中研究了火焰和冷却空气之间的热化学相互作用（用CO摩尔分数和气相温度测量值表示）。为了研究喷射冷却空气质量流量对热化学状态的影响，进行了参数研究。使用旋转振动N进行温度测量${}_2$相干反斯托克斯拉曼光谱（CARS）。通过使用在绝热加压层流火焰中获得的温度相关校准，通过定量CO两光子激光诱导的荧光（CO-LIF）来测量CO摩尔分数。在旋流稳定火焰的内部和外部剪切层中观察到明显不同的热化学状态。在主要区域内，增加的冷却空气质量流量会导致CO浓度降低。靠近流出冷却衬管，相互作用随轴向坐标变化。在外部再循环区，随着冷却空气质量流量的增加，CO的摩尔分数增加，表明在CO-T图的后期氧化分支中发生了化学淬灭。再往下游 混合过程占主导地位，CO浓度随所散发的冷却空气量的增加而降低。据我们所知，这是第一次通过实验证明这些效果。