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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >SIMULTANEOUS MEASUREMENTS OF DROPLET SIZE, TEMPERATURE, AND VELOCITY USING AN INTEGRATED PHASE-DOPPLER/RAINBOW THERMOMETER
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SIMULTANEOUS MEASUREMENTS OF DROPLET SIZE, TEMPERATURE, AND VELOCITY USING AN INTEGRATED PHASE-DOPPLER/RAINBOW THERMOMETER

机译：使用集成的相位多普勒/彩虹温度计同时测量液滴的大小，温度和速度

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摘要

This work summarizes efforts to determine the accuracy and performance characteristics of a new and novel laser diagnostic to measure instantaneous, in flight, droplet temperatures. The instrument uses the location of the rainbow peak to deduce the refractive index of the droplet, which in turn is related to the droplet temperature. Preliminary experiments were undertaken in order to understand the fundamental operating principles and limitations of the instrument. These experiments measured the temperature of an isothermal, single stream of monodisperse droplets. These measurements indicate that the mean refractive index can be measured with a standard deviation as low as 0.0001m. Once the operation of the refractometer was proved under isothermal conditions, the measurement of droplet temperatures in a swirl-stabilized combustor was performed. These measurements indicate that the strength of the rainbow signal is significantly hampered by the noise induced by the flame. Preliminary temperature measurements with the combustor equipped with 45°vanes showed relatively constant radial temperature profiles (～55-60℃) at locations less than 2 inches from the nozzle exit. A detailed examination of the temperature correlation with velocity and diameter revealed that larger and fester moving droplets dominate the distributions. Thus, the smaller droplets that are suspected of having the highest temperatures are inadequately represented in the mean droplet temperature.
机译：这项工作总结了确定新型和新型激光诊断仪以测量飞行中瞬时液滴温度的准确性和性能特征的努力。该仪器使用彩虹峰的位置来推导液滴的折射率，而折射率又与液滴的温度有关。为了了解仪器的基本操作原理和局限性，进行了初步实验。这些实验测量了单分散液滴的等温单流的温度。这些测量表明，可以以低至0.0001m的标准偏差来测量平均折射率。一旦证明了折光仪在等温条件下的运行，就可以在涡旋稳定的燃烧室中进行液滴温度的测量。这些测量结果表明，彩虹信号的强度明显受到火焰感应噪声的阻碍。配备45°叶片的燃烧室的初步温度测量显示，在距喷嘴出口不到2英寸的位置，径向温度分布相对恒定（约55-60℃）。详细研究温度与速度和直径之间的关系，发现较大和溃烂的液滴占主导地位。因此，怀疑具有最高温度的较小液滴在平均液滴温度中不足以表示。

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