WEKO3
アイテム
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"subitem_description_type": "Other"}, {"subitem_description": "The effect on time-spatial heat transfer characteristics of large-scale vortices was investigated by means of observing both dye flow and infrared images. Longitudinal vortices were artificially generated by a single winglet vortex generator in a pipe. The patterns of iso-velocity, static pressure, friction factor, and heat transfer coefficients show good correspondences to phenomena of the main vortex spirally flowing downstream. The quantitative analogy between the heat transfer and the shear stress is confirmed except for some regions, where the effects of the down-wash or blowaway of the secondary flows is caused by the main vortex rotating on its own axis on the surface at the wall. When the blunt body placed at the center of the duct height, the side vortex is observed to occur at the wall in an interlocking motion with a Karman vortex. These periodical phenomena of growing side vortices play a role in the increase of heat transfer. At narrow clearances, Karman vortex was not shedding, the maximum heat transfer is near the separation point of flow after it has passed the clearance space. When the body was attached to the duct surface, the vortices in the shear layer flow in good order to downstream direction, then combine with each other in downstream region, and after that large vortex attaches the surface. Near the reattachment point, the temperature shows high and low values alternatively. Attaching vortices to the surface caused to decrease the temperature on there, and the low temperature region moves downstream according to the vortices. The reattachment point was kept a high temperature until next vortex attaches to there successively. The heat transfer was augmented by the reattachment and detachment of large-scale vortices.", "subitem_description_type": "Other"}, {"subitem_description": "\u672a\u516c\u958b\uff1aP.8\u4ee5\u964d\uff08\u5225\u5237\u8ad6\u6587\u306e\u305f\u3081\uff09", "subitem_description_type": "Other"}, {"subitem_description": "\u7814\u7a76\u5831\u544a\u66f8", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "ja", "subitem_1522300316516": "\u89aa\u5ddd\u517c\u52c7"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "jpn"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/20.500.12000/9389"}]}, "item_1617186920753": {"attribute_name": "Source Identifier", "attribute_value_mlt": [{"subitem_1522646500366": "NCID", "subitem_1522646572813": "BA64343587"}]}, "item_1617187056579": {"attribute_name": "Bibliographic Information", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2001-04", "bibliographicIssueDateType": "Issued"}, "bibliographicPageStart": "none"}]}, "item_1617258105262": {"attribute_name": "Resource Type", "attribute_value_mlt": [{"resourcetype": "research report", "resourceuri": "http://purl.org/coar/resource_type/c_18ws"}]}, "item_1617265215918": {"attribute_name": "Version Type", "attribute_value_mlt": [{"subitem_1522305645492": "VoR", "subitem_1600292170262": "http://purl.org/coar/version/c_970fb48d4fbd8a85"}]}, "item_1617605131499": {"attribute_name": "File", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "download_preview_message": "", "file_order": 0, "filename": "10650219.pdf", "future_date_message": "", "is_thumbnail": false, "mimetype": "", "size": 0, "url": {"objectType": "fulltext", "url": "https://u-ryukyu.repo.nii.ac.jp/record/2004453/files/10650219.pdf"}, "version_id": "7145ab2c-87a4-4c54-bae9-cde3d0600cc7"}]}, "item_title": "\u6642\u9762\u30fb\u7a7a\u9593\u7684\u306b\u5909\u5316\u3059\u308b\u4f1d\u71b1\u306e\u8d64\u5916\u7dda\u6620\u50cf\u3068\u67d3\u6599\u6d41\u52d5\u306e\u540c\u6642\u6e2c\u5b9a\u306b\u3088\u308b\u89b3\u5bdf", "item_type_id": "15", "owner": "1", "path": ["1642838403123", "1642838406845"], "permalink_uri": "http://hdl.handle.net/20.500.12000/9389", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2009-03-26"}, "publish_date": "2009-03-26", "publish_status": "0", "recid": "2004453", "relation": {}, "relation_version_is_last": true, "title": ["\u6642\u9762\u30fb\u7a7a\u9593\u7684\u306b\u5909\u5316\u3059\u308b\u4f1d\u71b1\u306e\u8d64\u5916\u7dda\u6620\u50cf\u3068\u67d3\u6599\u6d41\u52d5\u306e\u540c\u6642\u6e2c\u5b9a\u306b\u3088\u308b\u89b3\u5bdf"], "weko_shared_id": -1}
時面・空間的に変化する伝熱の赤外線映像と染料流動の同時測定による観察
http://hdl.handle.net/20.500.12000/9389
http://hdl.handle.net/20.500.12000/9389932e45fb-697e-46c2-88f2-e56a3cc926d3
| 名前 / ファイル | ライセンス | アクション | |
|---|---|---|---|
10650219.pdf
|
|
| Item type | デフォルトアイテムタイプ（フル）(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2009-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | 時面・空間的に変化する伝熱の赤外線映像と染料流動の同時測定による観察 | |||||||||
| 言語 | ja | |||||||||
| 作成者 |
親川, 兼勇
× 親川, 兼勇
× Oyakawa, Kenyu
|
|||||||||
| アクセス権 | ||||||||||
| アクセス権 | open access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
| 主題 | ||||||||||
| 言語 | ja | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 乱流促進体 | |||||||||
| 言語 | ja | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 強制対流熱伝達 | |||||||||
| 言語 | ja | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 内部流れ | |||||||||
| 言語 | ja | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | カルマン渦 | |||||||||
| 言語 | ja | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 赤外線映像 | |||||||||
| 言語 | ja | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 流れの可視化 | |||||||||
| 言語 | ja | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 再循環領域 | |||||||||
| 言語 | ja | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 相似則 | |||||||||
| 内容記述 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 科研費番号: 10650219 | |||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 平成10年度～平成12年度科学研究費補助金(基盤研究C)(2)研究成果報告書 | |||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 研究概要：大きなスケールの渦の流動を染料で可視化,それに対応する温度場を赤外線映像装置で瞬時に測定し,時間・空間的に変化する伝熱現象を調べた.まず縦渦は円管内に三角形翼を傾けて設置することで発生させた.圧力分布,等速度分布,摩擦係数,熱伝達率の周方向変化より,主縦渦が旋回しながら流動する現象が明らかになった.渦の吹き下ろし部で熱伝達が促進され,逆に吹き上がり部において減少する.このような場で熱流束と摩擦係数との非相似性が発生している.流路内に鈍頭物体を隙間を変えて置くことでカルマン渦,再付着流れ,および隙間流れが干渉する場を得た.カルマン渦が放出される場合は巻き上げられた側渦はカルマン渦と逆向きに下壁面にDown washしたのちに,ちぎれて下流に流れる.温度は側渦が立ち上がろうとする位置で最大となり,渦がDown washするところで急激に低下する.とくにカルマン渦に巻き込まれながら渦芯が大きくなるが,それは中央部のフレッシュな流体を渦芯内に巻き込んでおり,それが下面にDown washする時に壁面は一段と冷却される.隙間が小さくなると,カルマン渦が放出される場合とそうでない双方が存在し,伝熱の特徴はそのどちらかを示す双安定的な性状となる.さらに隙間が小さくなると,壁面をスイープする流れが熱伝達率を高めており,その温度変化は不規則で卓越周波数は存在せず,側渦による伝熱の促進とは明らかに異なる伝熱機構である.物体を壁面においた場合は再循環領域が形成される.大きなスケールの渦が衝突する周期は一定ではなく,再付着点近傍では大きなスケールの渦が下面に再付着すると表面は冷やされ,その後渦が下流にちぎれて流れるのに追従して低温度域は下流に移動し,つぎの流体塊が再付着するまで,少し高めの温度分布となる.その状態を繰り返しており,付着,離脱を繰り返すことによって伝熱は促進される. | |||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | The effect on time-spatial heat transfer characteristics of large-scale vortices was investigated by means of observing both dye flow and infrared images. Longitudinal vortices were artificially generated by a single winglet vortex generator in a pipe. The patterns of iso-velocity, static pressure, friction factor, and heat transfer coefficients show good correspondences to phenomena of the main vortex spirally flowing downstream. The quantitative analogy between the heat transfer and the shear stress is confirmed except for some regions, where the effects of the down-wash or blowaway of the secondary flows is caused by the main vortex rotating on its own axis on the surface at the wall. When the blunt body placed at the center of the duct height, the side vortex is observed to occur at the wall in an interlocking motion with a Karman vortex. These periodical phenomena of growing side vortices play a role in the increase of heat transfer. At narrow clearances, Karman vortex was not shedding, the maximum heat transfer is near the separation point of flow after it has passed the clearance space. When the body was attached to the duct surface, the vortices in the shear layer flow in good order to downstream direction, then combine with each other in downstream region, and after that large vortex attaches the surface. Near the reattachment point, the temperature shows high and low values alternatively. Attaching vortices to the surface caused to decrease the temperature on there, and the low temperature region moves downstream according to the vortices. The reattachment point was kept a high temperature until next vortex attaches to there successively. The heat transfer was augmented by the reattachment and detachment of large-scale vortices. | |||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 未公開：P.8以降（別刷論文のため） | |||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 研究報告書 | |||||||||
| 出版者 | ||||||||||
| 言語 | ja | |||||||||
| 出版者 | 親川兼勇 | |||||||||
| 言語 | ||||||||||
| 言語 | jpn | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ | research report | |||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| 識別子 | ||||||||||
| 識別子 | http://hdl.handle.net/20.500.12000/9389 | |||||||||
| 識別子タイプ | HDL | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | BA64343587 | |||||||||
| 書誌情報 |
p. none, 発行日 2001-04 |
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