会議発表論文 Wing flutter computation using spectral volume method for hybrid unstructured mesh

Sawaki, Yuta  ,  Tateoka, Seiya  ,  Sawada, Keisuke  ,  澤木, 悠太  ,  舘岡, 誠也  ,  澤田, 恵介

内容記述
Toward accurate prediction of transonic wing flutter phenomenon, an implicit spectral volume method is extended to employ the ALE formulation for moving and deforming grid, and unstructured hybrid meshes for higher computational efficiency. The developed aeroelastic analysis code is applied to compute the transonic flutter of the AGARD 445.6 wing and a rectangular unswept wing. In this study, modal structure analysis is employed. The eigen frequencies and mode shapes of each mode in a reference are employed for the AGARD 445.6 wing flutter analysis. For the rectangular wing flutter analysis, we make the structure plate model using NASTRAN. It is shown that the computed flutter speed index and flutter frequency agree well with the experimental data at subsonic freestream condition, and considering viscous effects improve the computed results in supersonic freestream regime for the AGARD 445.6 wing. In the rectangular flutter case, the flutter speed index at transonic dip cannot be obtained quantitatively. Accounting for viscous effects slightly improve the flutter speed index. On the other hand, the flutter frequency is significantly improved by solving RANS equations at the transonic dip condition compared with that obtained by Euler computation. The cause for this improvement is under consideration.
Meeting Information: First International Symposium on Flutter and its Application (May 15-17, 2016. Mielparque-tokyo), Minato-ku, Tokyo, Japan
Physical characteristics: Original contains color illustrations
形態: カラー図版あり
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https://repository.exst.jaxa.jp/dspace/bitstream/a-is/612449/1/AA1630046016.pdf

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