The Resource Bound-free continuum radiation from non-gray nonisothermal shock layers, by Chu Yih Wang

Bound-free continuum radiation from non-gray nonisothermal shock layers, by Chu Yih Wang

Label
Bound-free continuum radiation from non-gray nonisothermal shock layers
Title
Bound-free continuum radiation from non-gray nonisothermal shock layers
Statement of responsibility
by Chu Yih Wang
Creator
Author
Subject
Language
eng
Summary
"This study investigates the continuum radiative flux from nonisothermal stagnation shock layers composed of atomic gases. The general equations for the composition are derived and the Rankine-Hugoniot equations are simplified and solved to give the thermodynamic conditions of the shock layers. To accurately model the stagnation shock layer, the plasma must be considered to be nonisothermal. In the current study, linear shock layer temperature profiles are assumed. Consequently, the fluid dynamics and the radiation are uncoupled. The radiation model assumes one-dimensional radiative energy transport and considers only continuum processes. The radiative flux is calculated by considereing ground to free state radiative transitions in hydrogen plasmas. The effect of Mach number, ambient density, special variation of the absorption coefficient, shock layer thickness, excited state and temperature profiles are examined. The principle of superposition extends the results to multiple electronic state atomic gases. The method is applied to helium, argon and xenon plasmas. The results show that the flux to the wall first increases then decreases as Mach number increases at constant ambient density. When ambient density is increased at a constant value of T[subscript r], the flux increases continuously for r the isothermal case; while for the nonisotherrnal cases the flux first increases then decreases. This study emphasizes the effect of variable shock layer composition. The ground state population decreases as one moves away from the wall; while the excited state population increases. The ground state flux from the constant composition shock layer is smaller than the flux from variable composition shock layers at values of optical thickness less than unity and larger at values of optical thickness greater than unity; while the excited state flux from constant composition shock layer is larger than the flux from variable composition shock layers at values of excited state optical thickness less than unity and smaller at values of optical thickness greater than unity. The assumption of constant shock layer composition gives a good approximation of the shock layer flux near optical thicknesses of unity"--Abstract, pages ii-iii
Member of
Cataloging source
UMR
http://library.link/vocab/creatorDate
1943-
http://library.link/vocab/creatorName
Wang, Chu Yih
Degree
M.S.
Dissertation year
1970.
Granting institution
University of Missouri--Rolla
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/subjectName
  • Shock waves
  • Gases at high temperatures
  • Radiative transfer
Label
Bound-free continuum radiation from non-gray nonisothermal shock layers, by Chu Yih Wang
Instantiates
Publication
Note
Vita
Bibliography note
Includes bibliographical references (pages 105-108)
Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Control code
871717142
Extent
1 online resource (xiv, 109 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia
Media type code
c
Other physical details
illustrations
Specific material designation
remote
System control number
(OCoLC)871717142
Label
Bound-free continuum radiation from non-gray nonisothermal shock layers, by Chu Yih Wang
Publication
Note
Vita
Bibliography note
Includes bibliographical references (pages 105-108)
Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Control code
871717142
Extent
1 online resource (xiv, 109 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia
Media type code
c
Other physical details
illustrations
Specific material designation
remote
System control number
(OCoLC)871717142

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