Application of structured illumination to gas phase thermometry using thermographic phosphor particles: a study for averaged imaging
Application of structured illumination to gas phase thermometry using thermographic phosphor particles: a study for averaged imaging
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使用热成像荧光粉颗粒的结构照明在气相测温中的应用：平均成像研究
DOI：
10.1007/s00348-017-2364-4
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发表时间：
2017
影响因子：
2.4
通讯作者：
Dreizler A
中科院分区：
文献类型：
--
作者：
Zentgraf F;Stephan M;Berrocal E;Albert B;Böhm B;Dreizler A
结构化激光照明平面成像（SLIPI）与气相测温测量相结合，使用热成像磷光体（TGP）颗粒。该技术被应用到一个加热的射流所包围的同向流，这是在环境温度下操作。用BaMgAl 10 O 17：Eu 2+（BAM）的粉末接种相应的空气流，所述粉末用作温度敏感的气相示踪剂。在紫外光谱范围内脉冲激发时，基于双色比方法结合SLIPI提取温度。将SLIPI方法应用于磷光体测温的主要优点是减少了粒子间的多次光散射和漫壁反射，从而产生了更稳健的校准程序，并提高了测量精度、精度和灵敏度。为了演示，本文侧重于样品平均测量的温度场的射流在同向流配置。使用传统的方法，这与SLIPI是基于成像与未调制的激光片，我们表明，对于目前的设置通常约40%的记录信号的影响，由多重散射光子的贡献。在靠近墙壁的位置处，甚至高达75%的表观信号是由于粘附在表面处的BAM的漫反射和墙壁发光。这些贡献导致错误的温度场。使用SLIPI，一个无偏的双色比场恢复允许二维平均温度重建表现出更真实的物理行为。这与传统方法推导出的结果相反。此外，使用SLIPI方法表明，在~270 °C下，温度灵敏度提高了~2倍。最后，对SLIPI瞬时磷光测温技术的发展进行了展望。
Structured laser illumination planar imaging (SLIPI) is combined with gas phase thermometry measurements using thermographic phosphor (TGP) particles. The technique is applied to a heated jet surrounded by a coflow which is operated at ambient temperature. The respective air flows are seeded with a powder of BaMgAl10O17:Eu2+(BAM) which is used as temperature-sensitive gas phase tracer. Upon pulsed excitation in the ultraviolet spectral range, the temperature is extracted based on the two-color ratio method combined with SLIPI. The main advantage of applying the SLIPI approach to phosphor thermometry is the reduction of particle-to-particle multiple light scattering and diffuse wall reflections, yielding a more robust calibration procedure as well as improving the measurement accuracy, precision, and sensitivity. For demonstration, this paper focuses on sample-averaged measurements of temperature fields in a jet-in-coflow configuration. Using the conventional approach, which in contrast to SLIPI is based on imaging with an unmodulated laser light sheet, we show that for the present setup typically ~40% of the recorded signal is affected by the contribution of multiply scattered photons. At locations close to walls even up to 75% of the apparent signal is due to diffuse reflection and wall luminescence of BAM sticking at the surface. Those contributions lead to erroneous temperature fields. Using SLIPI, an unbiased two-color ratio field is recovered allowing for two-dimensional mean temperature reconstructions which exhibit a more realistic physical behavior. This is in contrast to results deduced by the conventional approach. Furthermore, using the SLIPI approach it is shown that the temperature sensitivity is enhanced by a factor of up to ~2 at ~270 °C. Finally, an outlook towards instantaneous SLIPI phosphorescence thermometry is provided.
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使用激光诱导磷光进行热湍流射流的气相测温。
影响因子：
3.8
作者：
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作者：
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发表时间：
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影响因子：
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作者：
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通讯作者：
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DOI：
--
发表时间：
2008
期刊：
影响因子：
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作者：
T. Behrendt;T. Lengyel;C. Hassa;M. Gerendás
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