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Title: A computational approach for hypersonic nonequilibrium radiation utilizing space partition algorithm and Gauss quadrature

An efficient computational capability for nonequilibrium radiation simulation via the ray tracing technique has been accomplished. The radiative rate equation is iteratively coupled with the aerodynamic conservation laws including nonequilibrium chemical and chemical–physical kinetic models. The spectral properties along tracing rays are determined by a space partition algorithm of the nearest neighbor search process, and the numerical accuracy is further enhanced by a local resolution refinement using the Gauss–Lobatto polynomial. The interdisciplinary governing equations are solved by an implicit delta formulation through the diminishing residual approach. The axisymmetric radiating flow fields over the reentry RAM-CII probe have been simulated and verified with flight data and previous solutions by traditional methods. A computational efficiency gain nearly forty times is realized over that of the existing simulation procedures.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3]
  1. Wright State University, Dayton, OH (United States)
  2. (Russian Federation)
  3. Institute for Problems in Mechanics, Moscow, 119526 (Russian Federation)
Publication Date:
OSTI Identifier:
22314865
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Computational Physics; Journal Volume: 266; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; ALGORITHMS; AXIAL SYMMETRY; CONSERVATION LAWS; EFFICIENCY; GAIN; GAUSS FUNCTION; ITERATIVE METHODS; KINETIC EQUATIONS; MATHEMATICAL SOLUTIONS; PARTITION; POLYNOMIALS; PROBES; QUADRATURES; REACTION KINETICS; RESOLUTION; SPACE