Mixing Characteristics of Multijet Modified by Cyclic Perturbation
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- TATSUMI Kazuya
- Department of Mechanical Engineering, Osaka Prefecture University
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- SHINOHARA Eri
- Department of Mechanical Engineering, Osaka Prefecture University
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- OKAMOTO Fumitoshi
- Department of Mechanical Engineering, Osaka Prefecture University
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- KITAOKA Yuki
- Matsushita Electric Industrial Corporation
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- NAKABE Kazuyoshi
- Department of Mechanical Engineering, Osaka Prefecture University
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Abstract
The effect of cyclic perturbation on the mixing performance of millimeter-sized multiple air jets was investigated using flow visualization, hot-wire anemometry and laser Doppler anemometry techniques. Two types of external perturbation method were used, i.e., adding an acoustic sound and applying a pulsating flow to the jet. External acoustic sounds were found to be an additional dominant factor for the jet mixing, and in the multiple-jet case, the main jet located in the middle between the two same-sized jets was split into two, entrained into the neighboring jets, and eventually merged into one developed flow. For the pulsating-jet case, depending on the phase in one cycle, the jet flow condition alternately changed between laminar and turbulent. This affected the time-mean values of the jet flow profile. An adverse change in the mixing performance at the locations near the nozzle and far downstream was obtained between the pulsating- and steady-jet cases.
Journal
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- JSME International Journal Series B
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JSME International Journal Series B 49 (4), 959-965, 2006
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390282679653069696
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- NII Article ID
- 110004850788
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- NII Book ID
- AA10888815
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- ISSN
- 13475371
- 13408054
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- NDL BIB ID
- 8535542
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed