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Subpixel Temperature Measurements in Plasma Jet Environments Using High-Speed Multispectral Pyrometry
Fu TR; Liu JF; Duan MH; Li S(李森)
Source PublicationJOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
2018-07-01
Volume140Issue:7
ISSN0022-1481
Abstract

A high-speed (2 kHz) near-infrared (1.0-1.65 mu m) multispectral pyrometer was used for noninvasive measurements of the subpixel temperature distribution near the sharp leading edge of a wing exposed to a supersonic plasma jet. The multispectral pyrometer operating in the field measurement mode was able to measure the spatial temperature distribution. Multiple spectra were used to determine the temperature distributions in the measurement region. The spatial resolution of the multispectral pyrometer was not restricted to one "pixel" but was extended to subpixel accuracy (the temperature distribution inside one pixel in the image space corresponding to the point region in the object space). Thus, this system gives high-speed, multichannel, and long working time spatial temperature measurements with a small data stream from high-speed multispectral pyrometers. The temperature distribution of the leading edge of a ceramic wing was investigated with the leading edge exposed to extreme convective heating from a high-enthalpy plasma flow. Simultaneous measurements with a multispectral pyrometer and an imaging pyrometer verify the measurement accuracy of the subpixel temperature distribution. Thus, this multispectral pyrometry can provide in situ noninvasive temperature diagnostics in supersonic plasma jet environments.

KeywordTemperature Multispectral Pyrometer Optical Diagnostics Plasma
DOI10.1115/1.4038874
Indexed BySCI ; EI
Language英语
WOS IDWOS:000433492200005
WOS KeywordRADIATION THERMOMETRY ; REENTRY CONDITIONS ; VISIBLE PYROMETRY ; EMISSIVITY ; DIAGNOSTICS ; SURFACES ; COMBUSTION ; CERAMICS ; SYSTEM
WOS Research AreaThermodynamics ; Engineering
WOS SubjectThermodynamics ; Engineering, Mechanical
Funding OrganizationNational Key Research and Development Program of China(2016YFC0802500) ; National Natural Science Foundation of China(51576110) ; Opening Foundation of State Key Laboratory of High Temperature Gas Dynamics ; Science Fund for Creative Research Groups(51621062)
DepartmentLHD高效洁净燃烧(CPCR)
ClassificationQ3
Ranking2
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77499
Collection高温气体动力学国家重点实验室
Recommended Citation
GB/T 7714
Fu TR,Liu JF,Duan MH,et al. Subpixel Temperature Measurements in Plasma Jet Environments Using High-Speed Multispectral Pyrometry[J]. JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME,2018,140(7).
APA Fu TR,Liu JF,Duan MH,&李森.(2018).Subpixel Temperature Measurements in Plasma Jet Environments Using High-Speed Multispectral Pyrometry.JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME,140(7).
MLA Fu TR,et al."Subpixel Temperature Measurements in Plasma Jet Environments Using High-Speed Multispectral Pyrometry".JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME 140.7(2018).
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