{"created":"2023-06-20T15:15:16.177266+00:00","id":45340,"links":{},"metadata":{"_buckets":{"deposit":"d53fd539-f570-4b1b-87b3-32f31eef35aa"},"_deposit":{"created_by":1,"id":"45340","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"45340"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00045340","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["474233","474236","474231","474232","474234","474235"],"item_3_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"脚格納空間の騒音低減化の研究"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1990-09","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"9","bibliographicVolumeNumber":"1081","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所報告"},{"bibliographic_title":"Technical Report of National Aerospace Laboratory TR-1081","bibliographic_titleLang":"en"}]}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"It is generally recognized that airframe noise becomes a significant contributor to overall aircraft noise under landing conditions. Airframe noise is considered to be the sound radiated aerodynamically as a result of complex interplay between local flows and cofigurations that intrude or are recessed or deployed over the lifting surfaces and fuselage. The scale model acoustic testing of landing gears done by the authors revealed that the cavity noise was predominant in sound sources of landing device. As the succeeding phase of the test, here we report a study made to determine the sound generation mechaism and to reduce the sound level of the cavity noise. It is observed that an array of fins attached on the leading edge of the cavity offered a reduction of 7～8 dB in the sound pressure levels.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: NALTR1081000","subitem_description_type":"Other"}]},"item_3_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NAL TR-1081","subitem_description_type":"Other"}]},"item_3_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_3_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory(NAL)"}]},"item_3_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0389-4010","subitem_source_identifier_type":"ISSN"}]},"item_3_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"航空宇宙技術研究所熱流体力学部"},{"subitem_text_value":"航空宇宙技術研究所熱流体力学部"},{"subitem_text_value":"大阪府立大学"},{"subitem_text_value":"元・航空宇宙技術研究所熱流体力学部"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Thermofluid Dynamics Division, National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"Thermofluid Dynamics Division, National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"Osaka Prefecture University"},{"subitem_text_language":"en","subitem_text_value":"Former Thermofluid Dynamics Division, National Aerospace Laboratory(NAL)"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"武田, 克巳"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"西脇, 英夫"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"藤井, 昭一"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"TAKEDA, Katsumi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"NISHIWAKI, Hideo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"FUJII, Shoichi","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":"2020-01-29"}],"displaytype":"detail","filename":"naltr01081.pdf","filesize":[{"value":"551.3 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr01081.pdf","url":"https://jaxa.repo.nii.ac.jp/record/45340/files/naltr01081.pdf"},"version_id":"bf210ba2-feb7-4497-908b-8473b3402fb2"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"technical report","resourceuri":"http://purl.org/coar/resource_type/c_18gh"}]},"item_title":"The Reduction of Cavity Noise at Subsonic Speeds","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"The Reduction of Cavity Noise at Subsonic Speeds","subitem_title_language":"en"}]},"item_type_id":"3","owner":"1","path":["1893","1917"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"45340","relation_version_is_last":true,"title":["The Reduction of Cavity Noise at Subsonic Speeds"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:41:07.422777+00:00"}