"The radiative absorption coefficient of an isothermal hydrogen plasma is calculated using a step-wise gray approximation. The approximation retains a high degree of accuracy while significantly reducing the numerical computer time. The accuracy of the approximation depends on the spacing of the steps taken in the frequency spectrum as well as the number or steps used; 135 steps are used in this study. Plasma conditions of interest in this study are for temperatures between 5000 and 60,000ºK, densities between 10⁻⁵ and 10⁻⁷ gm/cm³, and thicknesses between 0.1 and 100 cm. Flux and intensity calculations are made for each case using the average absorption coefficient developed from the step-wise gray approximation. The importance of the trade-off between the shift to higher frequencies in the maximum of the Planck function and the population increase of the high electronic states as temperature increases is discussed. The results are shown in graphical and tabular form for conditions pertinent to the Jovian atmospheric entry problem"--Abstract, page ii.
Nelson, Harlan F., 1938-2005
Crosbie, A. L. (Alfred L.)
Pauls, Franklin B., 1911-1996
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
United States. National Aeronautics and Space Administration
National Science Foundation (U.S.)
University of Missouri--Rolla
ix, 120 pages
© 1971 Keith Harlan Browne, All rights reserved.
Thesis - Open Access
Hydrogen plasmas -- Simulation methods
Heat -- Radiation and absorption
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Electronic OCLC #
Link to Catalog Record
Browne, Keith Harlan, "A step-wise gray approximation of the radiative absorption coefficient for an isothermal hydrogen plasma" (1971). Masters Theses. 5108.