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Cryogenic to high t...
Cryogenic to high temperature measurements in gas flows by femtosecond laser-induced CN luminescence
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- Han, Lei (författare)
- Tianjin University
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- Gao, Qiang (författare)
- Tianjin University,State Key Laboratory of Engines
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- Li, Bo (författare)
- Tianjin University,State Key Laboratory of Engines
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- Li, Zhongshan (författare)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,LTH profilområde: Aerosoler,LTH profilområden,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområde: Avancerade ljuskällor,LU profilområde: Ljus och material,Lunds universitets profilområden,Other operations, LTH,Faculty of Engineering, LTH,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,Faculty of Engineering, LTH,LTH Profile Area: Photon Science and Technology,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Tianjin University,State Key Laboratory of Engines
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Measurement: Journal of the International Measurement Confederation. - 0263-2241. ; 229
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Temperature is a crucial parameter of gas flow fields. Here, we present a novel thermometry technique for gas flow based on femtosecond laser-induced cyano (CN) luminescence. Specifically, a femtosecond laser with a central wavelength of 267 nm is used to induce CN violet emissions in a nitrogen flow seeded with a trace amount of methane. The spectral peak of CN B2Σ+- X2Σ+ (0,0) transitions shift to longer wavelengths with increasing temperatures, and the concentration of methane does not influence this spectral shift. The calibration curve of the spectral peak position and the temperature ranging from 93 to 1028 K is obtained through the experiment, and the curve exhibits a nearly linear trend in the low-temperature regime, and an uncertainty of 3.6 % at 173 K is obtained. The technique's wide temperature measurement capability makes it suitable for gas flow temperature measurements, particularly in environments with significant temperature variations, such as wind tunnels.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- CN
- Cryogenic temperature measurement
- Femtosecond laser
- Thermometry
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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