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A new hue capturing
technique for the quantitative interpretation of liquid crystal images used
in convective heat transfer studies |
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Author Information: |
Camci, C.; Kim, K.; Hippensteele,
S. A. |
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Abstract: |
A new
image processing based color capturing technique for the quantitative
interpretation of liquid crystal images used in convective heat transfer
studies is presented. This method is highly applicable to the surfaces
exposed to convective heating in gas turbine engines. It is shown that, in the
single-crystal mode, many of the colors appearing on the heat transfer
surface correlate strongly with the local temperature. A very accurate
quantitative approach using an experimentally determined linear hue vs temperature relation is found to be possible. The new
hue-capturing process is discussed in terms of the strength of the light
source illuminating the heat transfer surface, the effect of the orientation
of the illuminating source with respect to the surface, crystal layer
uniformity, and the repeatability of the process. The present method is more
advantageous than the multiple filter method because of its ability to
generate many isotherms simultaneously from a single-crystal image at a high
resolution in a very time-efficient manner. |
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Publication Date: |
Oct.
1992 |
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Document ID (CASI): |
19930029980 |
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Accession Number: |
93A13977 |
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Security Classif.: |
Unclassified |
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Restriction on Access: |
Unlimited |
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Authorized Users: |
Publicly
available |
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Copyright Indicator: |
Copyright |
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Description: |
11p |
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Source Publication: |
ASME,
Transactions, Journal of Turbomachinery (ISSN
0889-504X) / 114; 4; p. 765-775. |
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Imprint and Other Notes: |
ASME,
Transactions, Journal of Turbomachinery vol. 114,
no. 4 p. 765-775. Oct. 1992,ASME, International Gas
Turbine and Aeroengine Congress and Exposition,
36th, |
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Available From: |
Other
Sources |