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Visualization of two-dimensional temperature field on a plate with normal impingement of a supersonic jet

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Abstract

Thermographic phosphors utilize the luminescence properties of doped ceramic materials and can be used to measure surface temperatures as a non-contact temperature measurement method. These phosphor materials are coated onto the object of interest and are excited by a short UV laser pulse, and exhibit a temperature-sensitive exponential decay in emission when their excitation has stopped. This article first explores the temperature dependence of different binders to fabricate a cost-effective two-dimensional temperature measurement method based on lifetime technique under normal supersonic jet impingement. Different phosphor-coated samples by magnesium fluorogermanate thermographic phosphors were analyzed using a spectrometer and a photomultiplier to study the intensity of emitted light and temperatures at discrete points, respectively. Then, a high-speed camera is used to measure the surface temperature distributions. In the end, the phosphor coating on test specimens was installed under a normal supersonic jet to confirm the coating stability, which is essential for the applications as the temperature sensor.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant, which is funded by the Korean government (MSIT) (No. 2020R1A5A8018822). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20223030040120).

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Correspondence to Kyung Chun Kim.

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Mohammadshahi, S., Samsam-Khayani, H., Chen, B. et al. Visualization of two-dimensional temperature field on a plate with normal impingement of a supersonic jet. J Vis 26, 841–850 (2023). https://doi.org/10.1007/s12650-022-00907-x

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  • DOI: https://doi.org/10.1007/s12650-022-00907-x

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