Comparison of computations and experiments for nonequilibrium flow expansions around a blunted cone

1996 ◽  
Author(s):  
Lawrence Gochberg ◽  
Gary Allen, Jr. ◽  
Michael Gallis ◽  
George Deiwert
Keyword(s):  
Nonequilibrium Flow

Stability of an inhomogeneous vibrationally-nonequilibrium flow in a waveguide

2007 ◽  
Vol 42 (1) ◽  
pp. 126-132 ◽  
Author(s):  
R. V. Mukin ◽  
A. I. Osipov ◽  
A. V. Uvarov
Keyword(s):  
Nonequilibrium Flow

Narrow-Band k-Distribution Database for Atomic Radiation in Hypersonic Nonequilibrium Flows

2009 ◽  
Author(s):  
Ankit Bansal ◽  
Michael F. Modest ◽  
Deborah Levin
Keyword(s):  
Narrow Band ◽  
Distribution Data ◽  
Nonequilibrium Flow ◽  
Data Generation ◽  
Full Spectrum ◽  
Important Species ◽  
Radiative Fluxes ◽  
Cpu Time ◽  
Nonequilibrium Flows ◽  
The Cost

Full-spectrum k-distribution (FSK) and multi-group FSK approaches make it possible to evaluate radiative fluxes at a fraction of the cost needed for line-by-line calculations. However, the required k-distributions need to be assembled from accurate absorption coefficient data for each flow condition, which is computationally expensive. An accurate and compact narrow-band k-distribution database has been developed for the most important species encountered in hypersonic nonequilibrium flow. The database allows users to calculate desired full-spectrum k-distributions through look-up and interpolation. Strategies for k-distribution data generation are outlined. The accuracy of the database is tested by comparing narrow-band mean absorption coefficients and narrow-band emissivities with those obtained from line-by-line calculations. Application of the database to construct full-spectrum k-distributions accurately and efficiently is discussed, and results from a number of heat transfer calculations and cpu-time studies are presented.

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