DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jeon, Wonju | ko |
dc.contributor.author | Lee, Duck-Joo | ko |
dc.date.accessioned | 2008-12-18T07:18:44Z | - |
dc.date.available | 2008-12-18T07:18:44Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2008-12 | - |
dc.identifier.citation | AIAA JOURNAL, v.46, no.12, pp.2977 - 2986 | - |
dc.identifier.issn | 0001-1452 | - |
dc.identifier.uri | http://hdl.handle.net/10203/8128 | - |
dc.description.abstract | Diffraction by a flat airfoil in uniform flow in analytically examined, focusing on the acquisition of an accurate series solution for both low-and high-frequency incident waves. formulation of integral equations is based on the use of the Wiener-Hopf technique in the complex domain. As the kernels of the Integral equations are multivalued functions having a branch cut in the complex domain, the unknown in the integral operator is assumed to be a constant. Therefore, the solution is a zeroth-order approximate solution adequate for a high-frequency problem. In this stury, the unknown is expanded by a Taylor series of an arbitrary order in the analytic region, and the solution is obtained in series form involving a special function called a generalized gamma function Gamma(m) (u,z). As the generalized gamma functions occuring in finite diffraction theroy have the specific argument u as "nonnegative Integer +1/2," the authors used their previously determined exact and closed-form formulas of this special function to obtain the complete series solution. The present series solution exhibits faster convergence at a high frequency compared to a low frequency, whereas the Mathieu series solution in the elliptic coordinates converges faster at a low frequency relative to a higher frequency. Through exact and asymptotic evaluations of inverse Fourier transforms, the scattered and total acoustic fields are visualized in a physical domain and each term of the solution is physically interpreted as 1) semi-infinite leading-edge scattering, 2) trailing-edge correction, and 3) interaction between leading and trailing edges, respectively. | - |
dc.language | English | - |
dc.language.iso | en | en |
dc.publisher | AMER INST AERONAUT ASTRONAUT | - |
dc.subject | WIENER-HOPF KERNELS | - |
dc.subject | DIFFRACTION THEORY | - |
dc.subject | FACTORIZATION | - |
dc.subject | STRIP | - |
dc.title | Acoustic Differaction by a Finite Airfoil in Uniform Flow | - |
dc.type | Article | - |
dc.identifier.wosid | 000261528000001 | - |
dc.identifier.scopusid | 2-s2.0-57649090214 | - |
dc.type.rims | ART | - |
dc.citation.volume | 46 | - |
dc.citation.issue | 12 | - |
dc.citation.beginningpage | 2977 | - |
dc.citation.endingpage | 2986 | - |
dc.citation.publicationname | AIAA JOURNAL | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Jeon, Wonju | - |
dc.contributor.localauthor | Lee, Duck-Joo | - |
dc.type.journalArticle | Article; Proceedings Paper | - |
dc.subject.keywordPlus | WIENER-HOPF KERNELS | - |
dc.subject.keywordPlus | DIFFRACTION THEORY | - |
dc.subject.keywordPlus | FACTORIZATION | - |
dc.subject.keywordPlus | STRIP | - |
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