{"created":"2023-07-27T06:50:17.697549+00:00","id":43019,"links":{},"metadata":{"_buckets":{"deposit":"eecc297b-ab3d-4eee-aec0-5130fe23f751"},"_deposit":{"created_by":18,"id":"43019","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"43019"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00043019","sets":["2812:2813:2842"]},"author_link":["69206","69205"],"item_9_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1992-03","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"7p.","bibliographicVolumeNumber":"1989-1991","bibliographic_titles":[{"bibliographic_title":"平成3(1991)年度 科学研究費補助金 一般研究(C) 研究成果報告書"},{"bibliographic_title":"1991 Fiscal Year Final Research Report","bibliographic_titleLang":"en"}]}]},"item_9_creator_33":{"attribute_name":"著者別表示","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{}],"nameIdentifiers":[{},{}]}]},"item_9_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"熱交換器のフィン周りの流れは、層流・遷移・乱流などの流れの様相変化、後流の大規模構造流れや後流渦とも密接に関連して、非定常の不均一の流れパタ-ンを呈する。流れは時間的に不規則に変わるセル構造状のはく離流れ領域の発生を伴うため、測定上困難な点も多く、また流力・伝熱特性は極めて複雑で、未だ不明なことが多い。本研究は、風洞実験および数値シミュレ-ションによって明らかにした。まず、風洞実験によって、断面比0.5〜5の5種類の長方形断面列模型について表面圧力分布および後流速度分布などの測定により流れパタ-ンの予測を行った。列状角柱の不均一な非定常流れの測定は容易ではないが、流れパタ-ン認識と分類を行って、偏り流れの発生、偏り流れの間欠的時間変動の様相、偏り流れ発生の臨界すき間間隔、後流のセル構造の様相などを明らかにした。後流速度分布における整流効果などの新しい知見も得た。測定結果は可視化結果ともよく一致した。次に、単独および複数個の列状ブラフ・ボデ-周りのはく離を伴った流れと温度分布の数値シミュレ-ション法およびその計算コ-ドを開発した。従来の計算アルゴリズムでは数値的不安定となる欠点を改善し、複数個のフィン周りの温度場の計算を含んだ新たな計算コ-ドを開発、完成した。そして、種々な断面形状のフィン周りの流れと温度場の数値シミュレ-ションを行い、断面形状による熱伝達と流れのはく離形態などの流れパタ-ンの変化との間の相互関係を明らかにした。さらに、乱流計算に拡張するため、kーεモデルによる単独長方形断面柱周りの流れの数値シミュレ-ションを試みた。そして層流計算およびkーεモデルの適用限界を明らかにした。以上、熱交換器のフィンの最適形状・配置に関する研究として風洞実験と数値シミュレ-ションにより、流力・伝熱特性を詳細に調べ、最適フィン形状・配置の特定に資する基礎デ-タを得、論文6編にまとめた。","subitem_description_type":"Abstract"},{"subitem_description":"A row of uniformly spaced bluff bodies with a rectangular cross-section placed perpendicularly to an approaching flow like the fin rows of a heat exchanger produces unsteady and non-uniform flow across the row, which consists In separated flow region with an unsteady cell structure. The present study consists of experiments In a wind tunnel and numerical simulations of flow by a finite difference method. Firstly, a simultaneous measurements of pressures around the circumference of a fin row and velocity distribution of a wake In a wind tunnel allow the evaluation of instantaneous drag and lift forces In each mode of two and more flow patterns which appear by unsteadiness of a biased flow formed In the gaps, and In the biased flow, we find good correspondence of pressure distributions and lift and drag forces to wake velocity profiles. It Is concluded that the biased flow is metastable and can switch Intermittently In gaps, and that the nonuniformity of gap and wake flows is significant in the range of the gap ratio S/H below a critical value. We find also that the uniformity of a wake velocity Is the best at the critical gap for elongated rectangular cylinders, B/H=3, 5 In rows. Next, we have developed the computer-code for computation of flows around rectangular cylinders, to gain a better Insight into the detailed characteristics of the fluld- and thermo-dynamics of bluff bodies. By a finite volume method, both laninar flow and thermal fields around bluff bodies with a rectangular cross section of various B/H ratios and an aerofoil seption haie been computed on body-fitted curvilinear coordinates at a Reynolds number of(1, 4, 7)x1O^3, and we can successfully simulate some Interesting flow and thermal phenomena whereby a flow pattern critically, changes when the B/H ratio Is about 2.5 and 6 ; that Is, a fully separated flow, an alternately reattached one and a stationarily reattached one. It is also clarified that Nusselt number distribution well corresponds with a motion of flow about the body, such as the size of a vortex-formation region and a notion of vortices shed downstream over the side walls. The present computational code Is certified to be suitable as the computed results show a good agreement with the measured results, and the computed results clearly show the effects of a shape of the bluff body on aero- and thermo-dynamic characteristics. The results reveal an interactions between a wake and separation bubbles, also. Furthermore, turbulent flows around rectangular bodies also have been computed by a standard k-epsilon turbulence model. There are, however, some discrepancies between the results from the k-epsilon, turbulence model and experiments for unsteady phenomena. We have reported the results of experiments and numerical simulations on the optimum shapes of cross-section and arrangement of a row of fins, In six papers.","subitem_description_type":"Abstract"}]},"item_9_description_22":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"研究課題/領域番号:01550140, 研究期間(年度):1989-1991","subitem_description_type":"Other"},{"subitem_description":"出典：「熱交換器のフィンの最適形状・配置に関する研究」研究成果報告書　課題番号01550140\n(KAKEN：科学研究費助成事業データベース（国立情報学研究所）)\n　　　本文データは著者版報告書より作成","subitem_description_type":"Other"}]},"item_9_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24517/00049368","subitem_identifier_reg_type":"JaLC"}]},"item_9_publisher_17":{"attribute_name":"公開者","attribute_value_mlt":[{"subitem_publisher":"金沢大学工学部"}]},"item_9_relation_28":{"attribute_name":"関連URI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/search/?qm=80013689"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/search/?qm=80013689","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550140/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550140/","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-01550140/015501401991kenkyu_seika_hokoku_gaiyo/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-01550140/015501401991kenkyu_seika_hokoku_gaiyo/","subitem_relation_type_select":"URI"}}]},"item_9_version_type_25":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-12-11"}],"displaytype":"detail","filename":"TE-PR-OKAJIMA-A-kaken 1992-7p.pdf","filesize":[{"value":"217.4 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"TE-PR-OKAJIMA-A-kaken 1992-7p.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/43019/files/TE-PR-OKAJIMA-A-kaken 1992-7p.pdf"},"version_id":"c60cd0d9-a28d-4eb8-8842-c25b116e460f"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"research report","resourceuri":"http://purl.org/coar/resource_type/c_18ws"}]},"item_title":"熱交換器のフィンの最適形状・配置に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"熱交換器のフィンの最適形状・配置に関する研究"},{"subitem_title":"Studies on the optimum Shapes of Cross-Section and Arrangement of Fin Rows of a Heat Exchanger","subitem_title_language":"en"}]},"item_type_id":"9","owner":"18","path":["2842"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-12-11"},"publish_date":"2017-12-11","publish_status":"0","recid":"43019","relation_version_is_last":true,"title":["熱交換器のフィンの最適形状・配置に関する研究"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-07-27T14:52:03.580029+00:00"}