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Accuracy of Pressure Sensitive PaintUncertainty in pressure sensitive paint (PSP) measurement is investigated from a standpoint of system modeling. A functional relation between the imaging system output and luminescent emission from PSP is obtained based on studies of radiative energy transports in PSP and photodetector response to luminescence. This relation provides insights into physical origins of various elemental error sources and allows estimate of the total PSP measurement uncertainty contributed by the elemental errors. The elemental errors and their sensitivity coefficients in the error propagation equation are evaluated. Useful formulas are given for the minimum pressure uncertainty that PSP can possibly achieve and the upper bounds of the elemental errors to meet required pressure accuracy. An instructive example of a Joukowsky airfoil in subsonic flows is given to illustrate uncertainty estimates in PSP measurements.
Document ID
20040086088
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Liu, Tianshu
(NASA Langley Research Center Hampton, VA, United States)
Guille, M.
(Purdue Univ. West Lafayette, IN, United States)
Sullivan, J. P.
(Purdue Univ. West Lafayette, IN, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2001
Publication Information
Publication: AIAA Journal
Publisher: American Inst. of Aeronautics and Astronautics
Volume: 39
Issue: 1
Subject Category
Research And Support Facilities (Air)
Distribution Limits
Public
Copyright
Other

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