High-speed planar thermometry and velocimetry using thermographic phosphor particles
High-speed planar thermometry and velocimetry using thermographic phosphor particles
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DOI：
10.1007/s00340-013-5411-8
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发表时间：
2013-05-01
影响因子：
2.1
通讯作者：
Beyrau, Frank
中科院分区：
文献类型：
--
作者：
Abram, Christopher;Fond, Benoit;Beyrau, Frank
同时气相温度和速度成像使用微米大小的热成像荧光粉颗粒播种到流中演示在3 kHz的重复率。使用标准的粒子图像测速方法测量速度场，而温度由在355 nm处激发后的粒子的温度敏感磷光发射确定。由于粒子非常小，它们很快就具有周围气体的温度和速度。在500 K时，单次测温精度优于5%.时间分辨的测量在一个加热的圆柱体的唤醒，展示了这些成像诊断观察瞬态，耦合传热传质现象的效用。
Simultaneous gas-phase temperature and velocity imaging using micrometer-size thermographic phosphor particles seeded into the flow is demonstrated at a 3 kHz repetition rate. The velocity field is measured using a standard particle image velocimetry approach, while the temperature is determined from the temperature sensitive phosphorescence emission of the particles following excitation at 355 nm. Since the particles are very small, they rapidly assume the temperature and velocity of the surrounding gas. A single shot temperature precision of better than 5 % was achieved at 500 K. Time-resolved measurements in the wake of a heated cylinder are presented, demonstrating the utility of these imaging diagnostics to observe transient, coupled heat and mass transfer phenomena.