Research Papers: Radiative Heat Transfer

Multiscale Part-Spectrum k-Distribution Database for Atomic Radiation in Hypersonic Nonequilibrium Flows

[+] Author and Article Information
Ankit Bansal

Department of Mechanical Engineering,  The Pennsylvania State University, University Park, PA 16802, e-mail: azb162@psu.edu

Michael Modest1

Fellow ASME School of Engineering,  University of California, Merced, Merced, CA 95343 e-mail: MModest@eng.ucmerced.edu


Corresponding author.

J. Heat Transfer 133(12), 122701 (Oct 07, 2011) (7 pages) doi:10.1115/1.4004528 History: Received July 24, 2010; Revised June 27, 2011; Published October 07, 2011; Online October 07, 2011

An accurate and compact part-spectrum k-distribution database has been developed for the two most important radiating species N and O encountered in hypersonic nonequilibrium flows. The database allows users to calculate the desired full-spectrum k-distributions through look-up and interpolation, providing an efficient means to perform radiative transfer calculations. A detailed methodology of the k-distribution data generation is presented. An optimized Gauss quadrature scheme is implemented for reducing the size of the database. The accuracy of the database is determined by comparing part-spectrum emissivities with those obtained from line-by-line calculations. The application of the database to construct full-spectrum k-distributions at arbitrary gas states is discussed. Heat transfer results for the stagnation line of the Stardust vehicle are discussed and CPU-time studies are presented, demonstrating the accuracy and efficiency of the k-distribution database.

Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Nonequilibrium Planck function (a) with overlap and (b) without overlap; ne  = 5.0 × 1015 cm−3 , Te  = 10,000 K, and T = 15,000 K

Grahic Jump Location
Figure 2

Sample part-spectrum k-distributions; ne  = 5.0 × 1015 cm−3 , Te  = 10,000 K, and T = 15,000 K

Grahic Jump Location
Figure 3

Part-spectrum emissivity; ϕ=.50, Te  = 10,000 K, and T = 15,000 K

Grahic Jump Location
Figure 4

Stardust stagnation line flow field (a) species number density and (b) temperature

Grahic Jump Location
Figure 5

Radiative heat source and absolute error along the Stardust stagnation line flow field




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In