Masters Theses

Abstract

"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.

Advisor(s)

Nelson, Harlan F., 1938-2005

Committee Member(s)

Crosbie, A. L. (Alfred L.)
Pauls, Franklin B., 1911-1996

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Sponsor(s)

United States. National Aeronautics and Space Administration
National Science Foundation (U.S.)

Publisher

University of Missouri--Rolla

Publication Date

1971

Pagination

ix, 120 pages

Rights

© 1971 Keith Harlan Browne, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Hydrogen plasmas -- Simulation methods
Radiative transfer
Heat -- Radiation and absorption

Thesis Number

T 2670

Print OCLC #

6038494

Electronic OCLC #

880392286

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