On the Development of Coherent Structure in a Plane Jet (Part1, Characteristics of Two-Point Velocity Correlation and Analysis of Eigenmodes by the KL Expansion)
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概要
- 論文の詳細を見る
The simultaneous measurement of the velocities at two points with X-type hot wire probes has been performed in three regions of a plane jet (i.e., the potential core region, the interaction region and the self-preserving region). The Karhunen Loeve (KL) expansion was applied to the velocity data, and the development of coherent structure was investigated by the eigenvalues and eigenfunctions as well as the spatial velocity correlations. It is found that in the potential core region the first and second modes are dominant in the kinetic energy with almost the same magnitude. The profiles of the eigenfunctions downstream of the interaction region show that the first mode of streamwise velocity u is asymmetrical about the jet centerline whereas that of cross-streamwise velocity v is symmetrical. These results are consistent with the feature of the two-point velocity correlation.
- 一般社団法人日本機械学会の論文
- 2006-02-15
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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KUSHIDA Takehiro
Department of Mechano-Informatics & Systems, Graduate School of 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 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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Kushida Takehiro
Department Of Mechanical Science And Engineering Nagoya University
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