ON THE LARGE-SCALE TURBULENT STRUCTURE IN THE SELF-PRESERVING REGION OF A PLANE JET : THE MULTI-POINT SIMULTANEOUS MEASUREMENT OF TWO-COMPONENT VELOCITIES AND SIMPLE COHERENT STRUCTURE MODEL(Plane Jet)
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概要
- 論文の詳細を見る
In order to clarify the large-scale coherent structure in a turbulent plane jet, the simultaneous measurement of the main streamwise and the cross-streamwise velocity at 9 points in the self-preserving region of a turbulent plane jet has been performed by an array of X-type hot-wire probes. From the time variation of the main streamwise fluctuating velocity field, it is found that there exists a pair of fluid lumps with the positive and negative fluctuating velocity on opposite sides of the jet centerline. On the other hand, the instantaneous cross-streamwise fluctuating velocity shows the same sign over the cross-section, i.e., the vertically-striped pattern is formed. On the basis of the result of the KL (Karhunen-Loeve) expansion, a new interpretation of coherent structure model in the self-preserving region of a turbulent plane jet has been given from the combination of the "flapping" and the "puffing".
- 一般社団法人日本機械学会の論文
- 2005-10-05
著者
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Sakai Yasuhiko
Department Of Internal Medicine Fujita Health University School Of Medicine
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Sakai Yasuhiko
Dep. Of Mechanical Sci. And Engineering Nagoya Univ.
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Sakai Yasuhiko
Department Of Mechanical Science And Engineering Nagoya University
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YAMAMOTO Mutsumi
Toyota Industries Corporation
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TANAKA Nobuhiko
Department of Mechanical Science and Engineering, Nagoya University
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YAMAMOTO Mutsumi
Department of Mechanical Science and Engineering, Nagoya University
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KUBO Takashi
Ecotopia Science Institute, Nagoya University
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Kubo Takashi
Department Of Mechanical Science And Engineering Nagoya University
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Tanaka Nobuhiko
Department Of Mechanical Science And Engineering Nagoya University
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Tanaka Nobuhiko
Department Of Electrical And Electronic Engineering Graduate School Of Science And Engineering Tokyo
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