{"created":"2023-06-20T15:14:46.788386+00:00","id":44780,"links":{},"metadata":{"_buckets":{"deposit":"63250714-67a9-48a5-8740-5bac51d4c9cf"},"_deposit":{"created_by":1,"id":"44780","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"44780"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00044780","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["471210","471209","471211","471208","471206","471207"],"item_3_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Acoustics and Performance of High-Speed, Unequally Spaced Fan Rotors"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1977-02","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"19","bibliographicVolumeNumber":"526","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所報告"},{"bibliographic_title":"Technical Report of National Aerospace Laboratory TR-526","bibliographic_titleLang":"en"}]}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"This paper describes an experimental measurement of the effects of uneven blade spacing on the acoustic and aero-thermodynamic characteristics of high-speed, high-pressure-ratio fan rotors at two selected spacing configurations. A test rig, consisting of inlet guide vanes and transonic rotor blades, was employed to explore the redistribution of harmonic sound energy into a series of multiple tones of lower sound pressure level. The measured data indicated that a 10％ modulated rotor exhibited a six to eight decibel decrease in the sound pressure level as compared with the original first blade passage frequency harmonic. Disadvantages in aerodynamic performance resulting from spacing modulation were not so unfavourable for 10％ modulated blades. However, with 5％ modulated blades, serious deterioration in aerodynamic performance was observed particularly near the blade tip section, which produced an unfavourable acoustic signature. A calculation method, assuming a pulse event for each blade sound pressure, provided agreeable results with the measured data.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: NALTR0526000","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-526","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"},{"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":"National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory(NAL)"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"藤井, 昭一"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"西脇, 英夫"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"武田, 克巳"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"FUJII, Shoichi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"NISHIWAKI, Hideo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"TAKEDA, Katsumi","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":"naltr00526.pdf","filesize":[{"value":"1.6 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr00526.pdf","url":"https://jaxa.repo.nii.ac.jp/record/44780/files/naltr00526.pdf"},"version_id":"fd1e9394-0bca-448d-8f34-de6543175677"}]},"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":"不等ピッチで高速回転するファンの音響特性と空力性能","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"不等ピッチで高速回転するファンの音響特性と空力性能"}]},"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":"44780","relation_version_is_last":true,"title":["不等ピッチで高速回転するファンの音響特性と空力性能"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:51:00.810053+00:00"}