A COMPARATIVE STUDY ON THE COHERENT STRUCTURES IN 2D AND 3D WALL JETS(Wall Jet and Wall Flow)
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概要
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This paper deals with statistical properties and dynamical structures of turbulence in a plane wall jet (PWJ) and a three-dimensional wall jet (3DWJ.) Measurements have been made in the flow fields created from jets impinging tangentially on a plate from a rectangular slit and circular nozzle, respectively. Basic quantities of these flows measured with a hot-wire anemometer are compared with each other. The nozzle-exit Reynolds numbers for the PWJ and 3DWJ were 15,000 and 100,000, respectively. The velocity profiles of U and W in the cross section of the fully-developed 3DWJ are nearly similar when they are nondimensionalized with the local maximum velocities and nozzle diameter, which imply that the length scale in the y-direction varies little in the z-direction. Multi-point velocity measurements were made on both flows with hot-wire rake probes. Coherent structures in the y-direction were analyzed by the POD in spatial domain.
- 一般社団法人日本機械学会の論文
- 2005-10-05
著者
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INOUE Yoshihiro
Dept. of Materials Science and Engineering, National Defense Academy
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Yamashita Shintaro
Dept. Mathematical And Design Eng. Gifu University
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Yano Haruhisa
Dept. Mech. Eng. Daido Inst. Tech.
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SAWADA Atsushi
Graduate School of Sport Sciences, Waseda University
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Funato Jun
Graduate School of Eng., Gifu University
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Funato Jun
Graduate School Of Eng. Gifu University
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Inoue Yoshihiro
Dept. Of Materials Science And Engineering National Defense Academy
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Inoue Yoshihiro
Dept. Mathematical And Design Eng. Gifu University
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Sawada Atsushi
Graduate School Of Tech. Daido Inst. Tech.
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