{"created":"2023-05-15T16:46:55.234734+00:00","id":23390,"links":{},"metadata":{"_buckets":{"deposit":"bde47946-1f2f-410c-9c9a-68b5fa6f9d66"},"_deposit":{"created_by":2,"id":"23390","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"23390"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00023390","sets":["14:21"]},"author_link":["98892","98896","98894","98891","98895","98893"],"item_2_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Experimental Investigation into the Mechanism of Discrete Frequency noise (DFN) Generation from a NACA 0012 Blade"}]},"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1993-03-25","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"559","bibliographicPageEnd":"806","bibliographicPageStart":"802","bibliographicVolumeNumber":"59","bibliographic_titles":[{"bibliographic_title":"日本機械学会論文集. B編"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"An experimental investigation was made into the mechanism of discrete frequency noise ( DFN )generation from a NACA 0012 blade placed in a uniform oncoming flow. It was clarified that DFN was generated when the boundary layer on the blade surface was laminar and separated at the location upstream of the trailing edge. A dead air region was formed just after the trailing edge of the blade. Therefore a Karman vortex street occurred. Meanwhile we could not observe a close relationship between the existence of a separation bubble and the generation of DFN. That is, DFN was generated even when the attack angle of the flow was nearly zero and no separation bubble was observed. When a separation bubble existed, the boundary layer became turbulent and the flow did not separate up to the trailing edge, so a dead air region was not formed behind the blade, which resulted in the disappearance of DFN. The prediction of the sound pressure level of DFN generated from this stream lined blade by Fukano's theory for a flat plate model agreed well with the measured value.","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"日本機械学會論文集. B編 59(559) p.802-806 1993","subitem_description_type":"Other"}]},"item_2_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"98894","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Hayashi, Hidechito"}]},{"nameIdentifiers":[{"nameIdentifier":"98895","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Fukano, Tohru"}]},{"nameIdentifiers":[{"nameIdentifier":"98896","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kodama, Yoshio"}]}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本機械学会"}]},"item_2_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00187441","subitem_source_identifier_type":"NCID"}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03875016","subitem_source_identifier_type":"ISSN"}]},"item_2_version_type_16":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"林, 秀千人"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"深野, 徹"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"児玉, 好雄"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-24"}],"displaytype":"detail","filename":"kikaiB559_802.pdf","filesize":[{"value":"346.2 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"kikaiB559_802.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/23390/files/kikaiB559_802.pdf"},"version_id":"96aa7099-2676-4d8f-82e5-51a0b8f5ae94"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Vortex","subitem_subject_scheme":"Other"},{"subitem_subject":"Aerodynamic Acoustics","subitem_subject_scheme":"Other"},{"subitem_subject":"Wake","subitem_subject_scheme":"Other"},{"subitem_subject":"Blade","subitem_subject_scheme":"Other"},{"subitem_subject":"Separation","subitem_subject_scheme":"Other"},{"subitem_subject":"Unsteady Flow","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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"一様流中に置かれたNACA0012翼から発生する離散周波数騒音の発生機構に関する実験的研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"一様流中に置かれたNACA0012翼から発生する離散周波数騒音の発生機構に関する実験的研究"}]},"item_type_id":"2","owner":"2","path":["21"],"pubdate":{"attribute_name":"公開日","attribute_value":"2007-02-22"},"publish_date":"2007-02-22","publish_status":"0","recid":"23390","relation_version_is_last":true,"title":["一様流中に置かれたNACA0012翼から発生する離散周波数騒音の発生機構に関する実験的研究"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2023-05-16T00:48:50.510725+00:00"}