Records of the time-varying temperature profile at flight relevant operating conditions are acquired at the exit of a combustion chamber fitted with a staged, lean-burn fuel injector using high-speed laser induced fluorescence (LIF) at a sample rate of 10 kHz. Temperatures are estimated from the concentration dependent fluorescence of the hydroxyl (OH) radical under the assumption of local equilibrium. Beyond the time-series analysis, the acquired data is correlated with simultaneously acquired OH chemiluminescence sampled in the primary zone near the fuel injector. These analyses reveal a strong influence from the precessing vortex core, originating in the primary zone, on oscillations in the temperature profiles measured at the exit of the combustor.

中文翻译：

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在实际运行条件下，单扇形燃气轮机燃烧室排气中的时间分辨温度分布测量

使用高速激光诱导荧光 (LIF) 以 10 kHz 的采样率，在装有分级稀燃燃料喷射器的燃烧室出口处获取飞行相关操作条件下随时间变化的温度曲线的记录。在假设局部平衡的情况下，根据羟基 (OH) 自由基的浓度依赖性荧光估计温度。除了时间序列分析之外，获取的数据与在燃料喷射器附近的主要区域中采样的同时获取的 OH 化学发光相关。这些分析揭示了起源于主区的进动涡核对燃烧室出口处测量的温度曲线振荡的强烈影响。