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Surface roughness effects on equilibrium temperature.An analysis is presented for evaluation of equilibrium temperature distribution on radiatively adiabatic, adjoint planes which are uniformly irradiated by a collimated solar flux. The analysis employs a semigrey spectral model. Radiation properties for surface emitted radiation are obtained from the expressions of electromagnetic theory for smooth surfaces. Rough surface properties for solar radiation are given by the Beckmann bidirectional reflectance model. Numerical solutions to the governing equations yield equilibrium temperature distributions for a range of the influencing parameters. Surface roughness has little influence on equilibrium temperature for materials with high values for solar absorptance. However, for low or intermediate values of solar absorptance, roughness effects on the spatial distribution of reflected solar radiation can significantly alter equilibrium temperature particularly at surface elements where radiant interaction is small.
Document ID
19720033210
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Houchens, A. F.
(Oakland University Rochester, Mich., United States)
Hering, R. G.
(Iowa, University Iowa City, Iowa, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Subject Category
Thermodynamics And Combustion
Report/Patent Number
AIAA PAPER 72-59
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting
Location: San Diego, CA
Start Date: January 17, 1972
End Date: January 19, 1972
Sponsors: Science Research Council
Accession Number
72A16876
Funding Number(s)
CONTRACT_GRANT: JPL-951661
Distribution Limits
Public
Copyright
Other

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