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극초음속 희박유동 해석을 위한 축대칭 다화학종 GH 방정식의 개발 = Evelopment of axisymmetric multi-species GH equiation for hypersonic rarefied flow analyses

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Authors
안재완; 김종암
Issue Date
2008-10
Publisher
한국전산유체공학회 = Korean Society of Computational Fluids Engineering
Citation
2008 한국전산유체공학회 추계술대회논문집, pp.84-91
Keywords
전산유체역학(CFD)희박유동(Rarefied Flow)GH(Generalized Hydrodynamic) 방정식다화학종 유동극초음속
Abstract
Generalized hydrodynamic (GH) theory for multi-species gas and the computational models are developed for the numerical simulation of hypersonic rarefied gas flow on the basis of Eu's GH theory. The rotational non-equilibrium effect of diatomic molecules is taken into account by introducing excess normal stress associated with the bulk viscosity. The numerical model for the diatomic GH theory is developed and tested. Moreover, with the experience of developing the dia-tomic GH computational model, the GH theory is extended to a multi-species gas including 5 species; O₂, N₂, NO, O, N. The multi-species GH model includes diffusion relation due to the molecular collision and thermal phenomena. Two kinds of GH models are developed for an axisymmetric flow solver. By compar-ing the computed results of diatomic and multi-species GH theories with those of the Navier-Stokes equations and the DSMC results, the accuracy and physical consistency of the GH computational models are examined.
Language
Korean
URI
http://uci.or.kr/G300-cX1153548.vn0p84

http://hdl.handle.net/10371/7675
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Others_기계항공공학부
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