{"created":"2023-06-20T15:07:32.463982+00:00","id":36904,"links":{},"metadata":{"_buckets":{"deposit":"86335c83-bd5c-42ae-bc29-792cc7160f34"},"_deposit":{"created_by":1,"id":"36904","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"36904"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00036904","sets":["1887:1891","1896:1898:1913:1915"]},"author_link":["478138","478140","478137","478134","478133","478139","478131","478135","478132","478136"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Effect of blade geometry on BVI noise of helicopter rotor"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1997-01","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"256","bibliographicPageStart":"251","bibliographicVolumeNumber":"34","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所特別資料"},{"bibliographic_title":"Special Publication of National Aerospace Laboratory","bibliographic_titleLang":"en"}]}]},"item_5_description_14":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"航空宇宙技術研究所 6-7 JUN. 1996 東京 日本","subitem_description_type":"Other"}]},"item_5_description_15":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）（英）","attribute_value_mlt":[{"subitem_description":"National Aerospace Laboratory 6-7 JUN. 1996 Tokyo Japan","subitem_description_type":"Other"}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"ヘリコプタロータのブレード渦干渉(BVI)騒音に対する予測法を開発した。この方法は次の4段階から成立っている、(1)揚力線理論に基づいたヘリコプタ総合解析プログラムCAMRAD2を用いるトリム解析、(2)ブレード運動と後流形状の補間、(3)3次元非定常オイラー方程式に対し有限差分法の解法を用いた空力解析、および(4)4極子項を含まないFfowcs Williams-Hawkings(FW-H)の式を基にした音響解析コードを用いた騒音解析。OLSモデルロータに対する予測音響波形を実験データと比較し、妥当な相関を得た。本方法を用いて翼端形状がBVI騒音の強さに及ぼす影響を検討した。第一段階として、下反角、上反角、後退、テーパ状翼端形状の影響を論じた。結果として、下反角、前進角、テーパ状翼端形状は下降飛行状態ではBVI騒音の低減に効果あることが分かった。","subitem_description_type":"Abstract"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"A prediction method for Blade-Vortex Interaction (BVI) noise of a helicopter rotor is developed. This method consists of following four steps: (1) trim analysis using CAMRAD2 based on the lifting line theory; (2) interpolation of blade motion and the wake geometry; (3) aerodynamic analysis using a finite difference solver for the three-dimensional unsteady Euler equations; and (4) noise analysis using an aeroacoustic code based on the Ffowcs Williams and Hawkings (FW-H) formulation without the quadrupole term. The predicted acoustic waveform for the OLS model rotor is compared with experimental data and reasonable correlation is obtained. This method is applied to investigate the effect of the tip shape on the intensity of the BVI noise. For the first step, the effects of anhedral, dihedral, swept and tapered tip shapes are discussed. As a result, it is shown that the anhedral, swept-forward and tapered tip shapes are good for the reduction of the BVI noise in a descent flight condition.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0000685045","subitem_description_type":"Other"}]},"item_5_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NAL SP-34","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory (NAL)"}]},"item_5_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0289-260X","subitem_source_identifier_type":"ISSN"}]},"item_5_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10097345","subitem_source_identifier_type":"NCID"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"コミュータヘリコプタ先進技術研究所"},{"subitem_text_value":"コミュータヘリコプタ先進技術研究所"},{"subitem_text_value":"コミュータヘリコプタ先進技術研究所"},{"subitem_text_value":"航空宇宙技術研究所"},{"subitem_text_value":"航空宇宙技術研究所"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Advanced Technology Institute of Commuter-Helicopter LTD"},{"subitem_text_language":"en","subitem_text_value":"Advanced Technology Institute of Commuter-Helicopter LTD"},{"subitem_text_language":"en","subitem_text_value":"Advanced Technology Institute of Commuter-Helicopter LTD"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"中村, 英明"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"近藤, 夏樹"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"青木, 誠"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"青山, 剛史"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"齊藤, 茂"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nakamura, Hideaki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kondo, Natsuki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Aoki, Makoto","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Aoyama, Takashi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Saito, Shigeru","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":"2020-02-10"}],"displaytype":"detail","filename":"nalsp0034045.pdf","filesize":[{"value":"605.4 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"nalsp0034045.pdf","url":"https://jaxa.repo.nii.ac.jp/record/36904/files/nalsp0034045.pdf"},"version_id":"176030a9-b1ea-44ba-9555-eb610e1849ba"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"ヘリコプタブレード","subitem_subject_scheme":"Other"},{"subitem_subject":"BVI","subitem_subject_scheme":"Other"},{"subitem_subject":"ブレード渦干渉","subitem_subject_scheme":"Other"},{"subitem_subject":"CAMRAD2","subitem_subject_scheme":"Other"},{"subitem_subject":"揚力線理論","subitem_subject_scheme":"Other"},{"subitem_subject":"補間コード","subitem_subject_scheme":"Other"},{"subitem_subject":"非定常オイラー方程式","subitem_subject_scheme":"Other"},{"subitem_subject":"差分法解","subitem_subject_scheme":"Other"},{"subitem_subject":"ブレード形状","subitem_subject_scheme":"Other"},{"subitem_subject":"上反角","subitem_subject_scheme":"Other"},{"subitem_subject":"音響波形","subitem_subject_scheme":"Other"},{"subitem_subject":"翼端形状","subitem_subject_scheme":"Other"},{"subitem_subject":"下反角","subitem_subject_scheme":"Other"},{"subitem_subject":"Ffowcs Williams-Hawkings方程式","subitem_subject_scheme":"Other"},{"subitem_subject":"helicopter rotor","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"BVI","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"blade vortex interaction","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"CAMRAD2","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"lifting line theory","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"interpolation code","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"unsteady Euler equation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"finite difference solver","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"blade geometry","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"dihedral","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"acoustic waveform","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"tip shape","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"anhedral","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Ffowcs Williams Hawkings equation","subitem_subject_language":"en","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":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"ヘリコプタ・ブレードの幾何形状がBVI騒音に与える影響","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"ヘリコプタ・ブレードの幾何形状がBVI騒音に与える影響"}]},"item_type_id":"5","owner":"1","path":["1891","1915"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"36904","relation_version_is_last":true,"title":["ヘリコプタ・ブレードの幾何形状がBVI騒音に与える影響"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:29:23.377240+00:00"}