천음속 유동장에서 음향파의 전파에 대한 수치적 연구Numerical Simulation of Acoustic Wave Propagation through a Moving Medium at Transonic Speeds

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dc.contributor.author황창전ko
dc.contributor.author고덕곤ko
dc.contributor.author이덕주ko
dc.date.accessioned2013-04-29T01:36:27Z-
dc.date.available2013-04-29T01:36:27Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued1993-06-
dc.identifier.citation한국항공우주학회지, v.21, no.3, pp.35 - 43-
dc.identifier.issn1225-1348-
dc.identifier.urihttp://hdl.handle.net/10203/173683-
dc.description.abstractTwo-dimensonal unsteady compressible flows are studied numerically for the caseof interactions between a initially steady flow and a periodically perturbed compressible flow. Two numerical schemes employed: implicit LU-ADI FDM & explicit Roe`s FDS FVM. The numerical methods are tested for four basic flows with appropriate numerical boundary conditions; acoustic wave propagations through a uniform duct with inflow excitation, through a uniform duct with wall excitation, through a bump inside a duct and a transonic steady flow over a circular arc bump duct. It turns out the methods are suitable for the simulation of low frequency wave propagations through the flow medium as well as for steady flow. Finally, calculations are carried out for the flow over an arc bump channel with periodically perturbed inflow conditions near transonic speeds. In general, periodic motions in the flow fields, including the shock on the bump. are clearly observed for the harmonic perturbation, At the region far downstream from the bump, a harmonic motion is observed. However, near the shock regions, higher hamonic motions are also observed for the harmonic perturbation. This might be due to the nonlinear and area-change effects near the bump.-
dc.languageKorean-
dc.publisher한국항공우주학회-
dc.title천음속 유동장에서 음향파의 전파에 대한 수치적 연구-
dc.title.alternativeNumerical Simulation of Acoustic Wave Propagation through a Moving Medium at Transonic Speeds-
dc.typeArticle-
dc.type.rimsART-
dc.citation.volume21-
dc.citation.issue3-
dc.citation.beginningpage35-
dc.citation.endingpage43-
dc.citation.publicationname한국항공우주학회지-
dc.contributor.localauthor이덕주-
dc.contributor.nonIdAuthor황창전-
dc.contributor.nonIdAuthor고덕곤-
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AE-Journal Papers(저널논문)
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