Optical and probe techniques are used to analyse the coupling mechanism between pressure, velocity and temperature fluctuations typical of pulsed flames, through the combination of laser velocimetry, digitally-compensated thermocouples and a proble microphone. The s ystem is based on a digital signal microprocessor and is shown to run up to 12.5 kHz of data ready velocity signals, allowing the time-resolved representation of vectors of turbulent heat flux along a typical cycle of oscillation. The detailed results obtained along the oscillating reacting shear layer show time sequences of zones characterised by gradient and non-gradient turbulent heat flux, which are structurally similar to previous results reported in the iterature for steady recirculating flames.
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机译：光学和探针技术用于通过激光速度，数字补偿热电偶和较称麦克风的组合来分析脉冲火焰的压力，速度和温度波动之间的耦合机制。 S ystem基于数字信号微处理器，并显示出高达12.5kHz的数据就绪速度信号，允许沿典型振荡循环沿湍流热通量的载体的时间分辨表示。沿振荡反应剪切层获得的详细结果显示了由梯度和非梯度湍流热通量表征的区域的时间序列，其在结构上类似于在稳定的再循环火焰中报道的先前结果。
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