{"created":"2023-06-20T15:08:22.727405+00:00","id":37811,"links":{},"metadata":{"_buckets":{"deposit":"fc12c499-e1de-4a71-b74f-d5d18c1e3e7d"},"_deposit":{"created_by":1,"id":"37811","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"37811"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00037811","sets":["1887:1891","1896:1898:1913:1915"]},"author_link":["430431","430432"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"On natural instability in the near region of initially turbulent free jets"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1994-10","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"28","bibliographicPageStart":"25","bibliographicVolumeNumber":"25","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所特別資料"},{"bibliographic_title":"Special Publication of National Aerospace Laboratory","bibliographic_titleLang":"en"}]}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"初期乱流状態の円管噴流の近傍場で周期性を中心とする流れの様子を観察した。速度変動の周波数からきまる卓越周波数は、噴流の直径よりは局所的な運動量厚によってよく規定され、準周期性の背後にせん断層型の不安定性があることを示唆する。このことは、円管噴流における固有不安定が局所せん断層厚さに規定され、噴流直径は補助的なパラメータにすぎないとするPeterson & Sametの概念と基本的に合致する。しかしながら我々の結果は、局所的な流れの平均量で無次元化された卓越周波数が局所運動量厚と噴流直径の比に伴なって著しく変化することを示す。せん断乱流における不安定性の観点から主に議論を行った。","subitem_description_type":"Abstract"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"Frequency-centered activity has been observed in the near region of initially turbulent circular jets. The dominant frequency determined from frequency spectra of velocity fluctuation scales better with local momentum thickness than with jet diameter, suggesting that the shear layer type of instability is responsible for the quasi periodicity. This is basically consistent with the notion of Petersen & Samet, that natural instabilities in circular jets scale with local shear-layer thickness, and the jet diameter is merely a subsidiary parameter. However the present result shows that the dominant frequency nondimensionalized with the local mean flow properties significantly varies with the ratio of local momentum thickness to jet diameter. Discussion is mainly made in the context of instability in shear flow turbulence.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0004172008","subitem_description_type":"Other"}]},"item_5_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NAL SP-25","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory (NAL)"}]},"item_5_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0289-260X","subitem_source_identifier_type":"ISSN"}]},"item_5_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10097345","subitem_source_identifier_type":"NCID"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"北海道大学 工学部"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Hokkaido University Faculty of Engineering"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"早川, 道雄"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Hayakawa, Michio","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-01-24"}],"displaytype":"detail","filename":"nalsp0025008.pdf","filesize":[{"value":"354.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"nalsp0025008.pdf","url":"https://jaxa.repo.nii.ac.jp/record/37811/files/nalsp0025008.pdf"},"version_id":"04bf36e1-f68b-48e0-8172-6eb60339499c"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"乱流自由噴流","subitem_subject_scheme":"Other"},{"subitem_subject":"円管噴流","subitem_subject_scheme":"Other"},{"subitem_subject":"流体力学的不安定","subitem_subject_scheme":"Other"},{"subitem_subject":"せん断流れ不安定","subitem_subject_scheme":"Other"},{"subitem_subject":"固有不安定性","subitem_subject_scheme":"Other"},{"subitem_subject":"噴流不安定","subitem_subject_scheme":"Other"},{"subitem_subject":"噴流速度変動","subitem_subject_scheme":"Other"},{"subitem_subject":"噴流相似パラメタ","subitem_subject_scheme":"Other"},{"subitem_subject":"中心ストローハル数","subitem_subject_scheme":"Other"},{"subitem_subject":"速度変動計測","subitem_subject_scheme":"Other"},{"subitem_subject":"準周期的速度変動","subitem_subject_scheme":"Other"},{"subitem_subject":"turbulent free jet","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"circular jet","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"hydrodynamic instability","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"shear flow instability","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"natural instability","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"jet instability","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"jet fluctuation frequency","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"jet scaling parameter","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"dominant Strouhal number","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"fluctuating velocity measurement","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"quasi periodical velocity fluctuation","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"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":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"乱流噴流の近傍場における不安定性について","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"乱流噴流の近傍場における不安定性について"}]},"item_type_id":"5","owner":"1","path":["1891","1915"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"37811","relation_version_is_last":true,"title":["乱流噴流の近傍場における不安定性について"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T22:49:11.165740+00:00"}