A technique for simultaneous velocimetry and thermometry in intermediate temperature flow is developed by combining hydroxyl-tagging velocimetry (HTV) and two-line OH planar laser-induced fluorescence (OH-PLIF). The OH tagging particles generated in HTV from the dissociation of water vapor are then used in two-line PLIF for thermometry. Using fragmentary OH expands PLIF to thermometry in regions that lack original OH, such as low temperature or unreactive ones. Meanwhile, using the PLIF system for both velocimetry and thermometry makes for a more efficient experimental system. As a proof of concept, the temperature and velocity are measured of a heated gas mixture comprising helium and water vapor. The temperature results agree well with the thermocouple results.

中文翻译：

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使用平面激光诱导的 H2O 光解离 OH 荧光在中温流中测速和测温

通过将羟基标记测速 (HTV) 和两线 OH 平面激光诱导荧光 (OH-PLIF) 相结合，开发了一种在中温流中同时测速和测温的技术。在 HTV 中由水蒸气解离产生的 OH 标记颗粒然后用于两线 PLIF 进行温度测量。使用碎片 OH 将 PLIF 扩展到缺乏原始 OH 的区域的温度测量，例如低温或无反应的区域。同时，将 PLIF 系统用于测速和测温可以形成更高效的实验系统。作为概念证明，测量包含氦气和水蒸气的加热气体混合物的温度和速度。温度结果与热电偶结果非常吻合。