{"created":"2023-05-15T16:29:19.148226+00:00","id":15,"links":{},"metadata":{"_buckets":{"deposit":"33bf6f89-cf9f-4977-a14d-404b36f098c8"},"_deposit":{"created_by":2,"id":"15","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"15"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00000015","sets":["14:15:16:17"]},"author_link":["71","70"],"item_3_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Study of Wake Interaction and Discrete Frequency Noise of a Forward Curved Fan"}]},"item_3_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2020-07","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"95","bibliographicPageEnd":"12","bibliographicPageStart":"7","bibliographicVolumeNumber":"50","bibliographic_titles":[{"bibliographic_title":"長崎大学大学院工学研究科研究報告"},{"bibliographic_title":"Reports of Graduate School of Engineering, Nagasaki University","bibliographic_titleLang":"en"}]}]},"item_3_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In order to clarify the physical mechanism of unpleasant fan noise, the discrete frequency noise (DFN) generated from a forward curved fan is evaluated quantitively based on the wake characteristics. The volute tongue of the scroll casing is replaced by a cylinder as an obstacle in order to simplify the mechanical model. Moreover, an analytical prediction model for the DFN generated by the wake interaction to the volute tongue of the scroll casing based on the wake characteristics of the impeller is proposed. To compare the prediction and measurement of the noise level, the influence of the clearance of the volute tongue on the DFN of the fan from the viewpoint of fluid dynamics is evaluated. The aerodynamic noise source was formed at the rear side of the impeller, which had large momentum in the wake. The momentum was rapidly lost by the diffusion in the near-wake field. The evaluated noise indicated that the noise level of the DFN was lower in the far-wake field than the broadband noise level. These results imply that the sinusoidal pressure fluctuation caused by the impingement of the jet-wake flow became weaker than the pressure fluctuation induced by the turbulence on the blade surface.","subitem_description_type":"Abstract"}]},"item_3_description_64":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"長崎大学大学院工学研究科研究報告, 50(95), pp.7-12; 2020","subitem_description_type":"Other"}]},"item_3_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"71","nameIdentifierScheme":"WEKO"}],"names":[{"name":"SASAKI, Soichi"}]}]},"item_3_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"長崎大学大学院工学研究科"}]},"item_3_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"18805574","subitem_source_identifier_type":"ISSN"}]},"item_3_text_62":{"attribute_name":"sortkey","attribute_value_mlt":[{"subitem_text_value":"02"}]},"item_3_text_63":{"attribute_name":"出版者別言語","attribute_value_mlt":[{"subitem_text_value":"Graduate School of Engineering, Nagasaki University"}]},"item_3_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":"佐々木, 壮一"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-16"}],"displaytype":"detail","filename":"50_95_7.pdf","filesize":[{"value":"1.5 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"50_95_7.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/15/files/50_95_7.pdf"},"version_id":"2bb7aec5-c346-4d11-954c-26435ff3da1e"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"wake interaction","subitem_subject_scheme":"Other"},{"subitem_subject":"aerodynamic noise","subitem_subject_scheme":"Other"},{"subitem_subject":"fan","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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"多翼ファンの後流干渉と離散周波数騒音に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"多翼ファンの後流干渉と離散周波数騒音に関する研究"}]},"item_type_id":"3","owner":"2","path":["17"],"pubdate":{"attribute_name":"公開日","attribute_value":"2020-09-08"},"publish_date":"2020-09-08","publish_status":"0","recid":"15","relation_version_is_last":true,"title":["多翼ファンの後流干渉と離散周波数騒音に関する研究"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2023-05-16T04:22:37.204421+00:00"}