Space-marching method on unstructured grid for supersonic flows with embedded subsonic regions

Kazuhiro Nakahashi, Eiji Saitoh

Research output: Contribution to conferencePaperpeer-review

8 Citations (Scopus)


A space-marching algorithm on an unstructured grid to solve supersonic flows that may contain embedded subsonic regions is proposed. The method employs a domain-marching algorithm in which a band-like computational subdomain is marched in the hyperbolic direction starting from the upstream boundary of the flow field. A masking procedure is employed where the outside of the selected domain is masked during the flux computations to minimize the overall arithmetic operations. The unmasked domain is integrated in time to get a locally converged solution. If embedded subsonic regions are present, the unmasked region is enlarged to cover the whole subsonic regions surrounded by supersonic points. The method is applied to calculations of a fully supersonic flow in a scramjet and a supersonic flow with embedded subsonic regions around a blunt-nose body. It is demonstrated that the computational work can be reduced by as much as a factor of 10 as compared to conventional, time-marching unstructured grid methods.

Original languageEnglish
Publication statusPublished - 1996 Jan 1
Event34th Aerospace Sciences Meeting and Exhibit, 1996 - Reno, United States
Duration: 1996 Jan 151996 Jan 18


Other34th Aerospace Sciences Meeting and Exhibit, 1996
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering


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