{"created":"2023-06-20T15:14:59.943227+00:00","id":45028,"links":{},"metadata":{"_buckets":{"deposit":"dbd77eeb-ae4a-4c4f-9802-a3c84c98c46d"},"_deposit":{"created_by":1,"id":"45028","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"45028"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00045028","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["472569","472567","472566","472568"],"item_3_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Suppression of Peak Noise by Reshaping Coaxial Flow Circumferentially under Static Conditions"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1983-07","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"11","bibliographicVolumeNumber":"770","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所報告"},{"bibliographic_title":"Technical Report of National Aerospace Laboratory TR-770","bibliographic_titleLang":"en"}]}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"The combination of a circular fan/elliptic core nozzle was tested and compared with the results of a conventional circular core/circular fan nozzle under static flow conditions. The results show that there occurred a change of the directiveness of jet noize around the nozzle when using the circular/elliptic nozzle combination. In a 30～50deg direction from the jet axis, a 3～5 dB reduction was observed. We measured radial velocity distribution by using LDV and axial sound source distribution by the polar correlation method in an anechoic room. Based on these measurments we discuss, in this paper, the relation between sound pressure generation and velocity distribution around the exhaust nozzle. We recommend herein a circular/elliptic nozzle combination for turbo-fan engine exhaust nozzle.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: NALTR0770000","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-770","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航空機公害研究グループ"},{"subitem_text_value":"航空宇宙技術研究所航空機公害研究グループ"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Noise and Emission Research Group, National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"Noise and Emission Research Group, National Aerospace Laboratory(NAL)"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"武田, 克己"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"西脇, 英夫"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"TAKEDA, Katsumi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"NISHIWAKI, Hideo","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":"naltr00770.pdf","filesize":[{"value":"1.6 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr00770.pdf","url":"https://jaxa.repo.nii.ac.jp/record/45028/files/naltr00770.pdf"},"version_id":"f49b9d2f-751b-41be-b1e5-10d82f45e209"}]},"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":"technical report","resourceuri":"http://purl.org/coar/resource_type/c_18gh"}]},"item_title":"ファンエンジン排気ノズルの形状変化による騒音低減の研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"ファンエンジン排気ノズルの形状変化による騒音低減の研究"}]},"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":"45028","relation_version_is_last":true,"title":["ファンエンジン排気ノズルの形状変化による騒音低減の研究"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:46:34.358924+00:00"}