국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Correction of flutter boundary of non-planar wing using measured local Mach number
저자	Atsushi KANDA
Keyword	Flutter; Non-Planar Wing; Channel Flow; Mach Number; Pitot Tube
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001452.pdf?id=NALTR0001452
보고서번호	NAL-TR-1452
발행년도	2002.11
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	TFor anti-symmetrical flutter speeds of a tip fin-shaped reentry space vehicle model, numerical predictions using the doublet-point method (DPM) were different from experimental results in a part of the lower supersonic region. The cause of the discrepancy is thought to be local flow over the wing differing from the free stream. Flutter boundary analysis was therefore corrected by using revised Mach numbers on the basis of measured local Mach numbers. In the case of revised Mach numbers calculated by local Mach numbers at places of large mode displacement on the wing, the corrected numerical results showed good agreement with experimental ones. Therefore it was confirmed that correction using local Mach numbers improves the accuracy of flutter boundary.