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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Enhancement and suppression of mixing and diffusion in an axisymmetric jet by half delta-wing tabs

http://hdl.handle.net/2237/00027948
53579d93-1fe0-4ecf-8f4e-dd0b3b2de24e
名前 / ファイル ライセンス アクション
manuscript.pdf manuscript (3.6 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2018-05-08
タイトル
タイトル Enhancement and suppression of mixing and diffusion in an axisymmetric jet by half delta-wing tabs
著者 Ito, Y.

× Ito, Y.

WEKO 76327

Ito, Y.

Search repository
Miura, K.

× Miura, K.

WEKO 76328

Miura, K.

Search repository
Sakai, Y.

× Sakai, Y.

WEKO 76329

Sakai, Y.

Search repository
Iwano, K.

× Iwano, K.

WEKO 76330

Iwano, K.

Search repository
権利
権利情報 © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
キーワード
主題Scheme Other
主題 Turbulence
キーワード
主題Scheme Other
主題 Jet control
キーワード
主題Scheme Other
主題 Tabs
キーワード
主題Scheme Other
主題 Diffusion
キーワード
主題Scheme Other
主題 Entrainment
キーワード
主題Scheme Other
主題 Mixing
抄録
内容記述 Effects of half delta-wing tabs on mixing and diffusion in an axisymmetric jet are experimentally investigated. The tabs are installed at the jet exit circumferentially with an equal interval. The number of the tab is varied from 1 to 6. The jet Reynolds number is set to 20,000. Instantaneous streamwise and radial (vertical or horizontal) velocities and temperature are mainly measured by a composite probe which consists of an X-type hot-wire and an I-type cold-wire. The results show that mixing with the ambient fluid is more enhanced with increasing the number of the tab near the jet exit. However, in the downstream region, it is suppressed in the cases with 4, 5, and 6 tabs and most suppressed in the case with 6 tabs, while it is most enhanced in the case with 3 tabs. The analysis based on the mean velocity distribution indicates that, although the spatially-averaged entrainment velocity is basically decreased by the tabs, the mixing and entrainment can be enhanced when the entrainment area is significantly increased. Thermal diffusion is more enhanced with increasing the number of the tab near the jet exit but, in the downstream region, it is equivalent or suppressed in the cases with the tabs. These results are caused by the mixed effects of the tabs: enhancement of not only mixing and diffusion but also the energy dissipation. The present study suggests that it is feasible to both promote and suppress mixing of the jet by the half delta-wing tabs, and directional characteristics of the jet diffusion can be controlled by optimizing configuration of the tabs.
内容記述タイプ Abstract
内容記述
内容記述 ファイル公開:2020/03/01
内容記述タイプ Other
出版者
出版者 Elsevier
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
DOI
関連識別子
識別子タイプ DOI
関連識別子 https://doi.org/10.1016/j.ijheatmasstransfer.2017.11.053
ISSN
収録物識別子タイプ ISSN
収録物識別子 00179310
書誌情報 International Journal of Heat and Mass Transfer

巻 118, p. 1218-1230, 発行日 2018-03-01
著者版フラグ
値 author
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