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Influence of pressure distribution on flow field temperature reconstruction |
Applied Optics, Vol. 50, Issue 15, pp. 2145-2151 (2011)
http://dx.doi.org/10.1364/AO.50.002145
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Abstract
This research proposes an issue that has previously been omitted in flow field temperature reconstruction by optical computerized tomography (OCT). To prove that it is not reasonable to always assume an isobaric process occurs when OCT is adopted to obtain the temperature distributions of flow fields, a propane–air flame and an argon arc plasma are chosen as two practical examples for experiment. In addition, the measurement of the refractive index is achieved by moiré deflection tomography. The results indicate that the influence of pressure distribution on temperature reconstruction is a universal phenomenon for various flow fields. Hence, the condition that can be introduced to estimate when an isobaric process can no longer be assumed is presented. In addition, an equation is offered to describe the temperature reconstruction imprecision that is caused by using the supposed pressure instead of the practical pressure.
© 2011 Optical Society of America
OCIS Codes
(110.6960) Imaging systems : Tomography
(120.4120) Instrumentation, measurement, and metrology : Moire' techniques
(120.6780) Instrumentation, measurement, and metrology : Temperature
(280.2490) Remote sensing and sensors : Flow diagnostics
ToC Category:
Imaging Systems
History
Original Manuscript: November 30, 2010
Revised Manuscript: January 14, 2011
Manuscript Accepted: February 3, 2011
Published: May 13, 2011
Citation
Yun-yun Chen, Yang Song, Zhen-hua Li, and An-zhi He, "Influence of pressure distribution on flow field temperature reconstruction," Appl. Opt. 50, 2145-2151 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-15-2145
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