トドロキ コフン ミタケサン コフン ハックツ チョウサ ホウコク ホテイ

特別寄

トドロキ コフン ミタケサン コフン ハックツ チョウサ ホウコク

特別寄

Transition Within Leeward Plane of Axisymmetric Bodies at Incidence in Supersonic Flow

Boundary layer transition along the leeward symmetry plane of axisymmetric bodies at nonzero angle of attack in supersonic flow was investigated experimentally and numerically as part of joint research between the Japan Aerospace Exploration Agency (JAXA) and National Aeronautics and Space Administration (NASA). Transition over four axisymmetric bodies (namely, Sears-Haack body, semi-Sears-Haack body, straight cone and flared cone) with different axial pressure gradients was measured in two different facilities with different unit Reynolds numbers. The semi-Sears-Haack body and flared cone were designed at JAXA to broaden the range of axial pressure distributions. For a body shape with an adverse pressure gradient (i.e., flared cone), the experimentally measured transition patterns show an earlier transition location along the leeward symmetry plane in comparison with the neighboring azimuthal locations. For nearly zero pressure gradient (i.e.,straight cone), this feature is only observed at the larger unit Reynolds number. Later transition along the leeward plane was observed for the remaining two body shapes with a favorable pressure gradient. The observed transition patterns are only partially consistent with the numerical predictions based on linear stability analysis. Additional measurements are used in conjunction with the stability computations to explore the phenomenon of leeward line transition and the underlying transition mechanism in further detail

An attempt at a family tree of Japanese dialect accentuation : As viewed from "class mergers" and "geographical distribution"

ORIGINAL PAPER徳川宗賢, 1962, 「“日本諸方言アクセントの系譜”試論 ―「類の統合」と「地理的分布」から見る―」, 『学習院大学国語国文学会誌』6, pp. 1-19.TOKUGAWA, Munemasa, 1962, “Nihongo sho-hōgen akusento-no keifu” shiron: “rui-no tōgō”-to “chiri-teki bumpu”-kara miru, Gakushūin Daigaku Kokugo Kokubungaku Kaishi 6, pp. 1-19.Translated by Wayne Lawrence (The University of Auckland)Proofed by Timothy J. Vance (Komatsu University