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Type of Document	Engineer's Thesis
Author	Thompson, Thomas R.
URN	etd-10182005-082033
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-10182005-082033
Title	The gray gas in hypersonic flow
Degree	Engineer's Degree
Option	Aeronautics
Advisory Committee	Advisor Name Title Lester Lees Committee Chair
Keywords	none
Date of Defense	1963-01-01
Availability	unrestricted
Abstract The assumption that the spectral absorption coefficient is independent of frequency in problems involving radiant energy transfer in hot gases is examined. A particular case, that of the hypersonic wake, is treated in some detail, and a non-gray transfer equation involving two mean coefficients is developed. One mean absorption coefficient is related to emission, and the other to absorption. The problems arising from lack of chemical equilibrium are discussed, and a modification of the equations used for prediction of the spectral absorption coefficient (for diatomic species) is suggested, wherein two distinct temperatures are utilized. Sample calculations for one nitrogen band have been made and the results presented graphically.
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