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Article

Development of a Dew/Frost Point Temperature Sensor Based on Tunable Diode Laser Absorption Spectroscopy and Its Application in a Cryogenic Wind Tunnel

by 1,2, 1, 1,*, 1, 1, 3 and 1
1
Key Laboratory of Environmental Optics and Technology, AnHui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
2
University of Science and Technology of China, Hefei 230031, China
3
China Aerodynamics Research and Development Center, Mianyang 621000, China
*
Author to whom correspondence should be addressed.
Received: 11 July 2018 / Revised: 14 August 2018 / Accepted: 14 August 2018 / Published: 17 August 2018
(This article belongs to the Collection Gas Sensors)
We have proposed a sensor for real-time and online measurement of dew/frost point temperature using tunable diode laser absorption spectroscopy (TDLAS) technique. Initial experiments have demonstrated its feasibility and technical advantages in comparison to a chilled mirror hygrometer (CMH). The TDLAS sensor we developed has a dew/frost point temperature range from −93 °C to + 14.5 °C, with a measurement uncertainly of less than 2%, and a response time of about 0.8 s, which is much faster than that of the chilled mirror hygrometer (ranging from several minutes to several hours). A TDLAS-based dew/frost point sensor has many advantages, such as rapid and continuous measurements, low frost point temperature sensing, high accuracy, and non-intrusiveness. Such a sensor would be useful for dew/frost point temperature determinations in various applications. In a cryogenic wind tunnel, real-time dew/frost point temperature measurements are helpful in preventing the formation of condensed liquid and ice, which can affect the model geometry and lead to unreliable test data. View Full-Text
Keywords: dew/frost point temperature; TDLAS; saturated vapor pressure; wind tunnel dew/frost point temperature; TDLAS; saturated vapor pressure; wind tunnel
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MDPI and ACS Style

Nie, W.; Xu, Z.; Kan, R.; Ruan, J.; Yao, L.; Wang, B.; He, Y. Development of a Dew/Frost Point Temperature Sensor Based on Tunable Diode Laser Absorption Spectroscopy and Its Application in a Cryogenic Wind Tunnel. Sensors 2018, 18, 2704. https://0-doi-org.brum.beds.ac.uk/10.3390/s18082704

AMA Style

Nie W, Xu Z, Kan R, Ruan J, Yao L, Wang B, He Y. Development of a Dew/Frost Point Temperature Sensor Based on Tunable Diode Laser Absorption Spectroscopy and Its Application in a Cryogenic Wind Tunnel. Sensors. 2018; 18(8):2704. https://0-doi-org.brum.beds.ac.uk/10.3390/s18082704

Chicago/Turabian Style

Nie, Wei, Zhenyu Xu, Ruifeng Kan, Jun Ruan, Lu Yao, Bin Wang, and Yabai He. 2018. "Development of a Dew/Frost Point Temperature Sensor Based on Tunable Diode Laser Absorption Spectroscopy and Its Application in a Cryogenic Wind Tunnel" Sensors 18, no. 8: 2704. https://0-doi-org.brum.beds.ac.uk/10.3390/s18082704

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