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http://dx.doi.org/10.5139/JKSAS.2003.31.7.001

Numerical Characteristics of Hypersonic Air Chemistry and Application of Partially Implicit Time Integration Method  

Kim, Seong-Lyong (한국항공우주연구원)
Ok, Ho-Nam (한국항공우주연구원)
Ra, Seung-Ho (한국항공우주연구원)
Kim, In-Sun (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.31, no.7, 2003 , pp. 1-8 More about this Journal
Abstract
Numerical characteristics of air chemistry associated with hypersonic flows are described and are compared with those of hydrogen oxygen combustion, applying the partially implicit time integration method to air chemistry. This paper reveals that the time integration of air chemistry needs a chemical Jacobian for stable calculations. However the positive real eigenvalues in air chemistry are relatively smaller than those of hydrogen combustion, and the numerical integration is less sensitive than that with combustion. lt is also found that the application of the partia1ly irnplicit method reduces the computing time without numerical instabilities.
Keywords
Partial Implicit Method; Hyperconic Flow; Air Chemistry;
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