{"created":"2023-06-20T15:11:02.743035+00:00","id":40629,"links":{},"metadata":{"_buckets":{"deposit":"91deb436-eb85-494e-8491-7006358b1082"},"_deposit":{"created_by":1,"id":"40629","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"40629"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00040629","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["448975","448973","448980","448974","448979","448976","448981","448972","448977","448978"],"item_3_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"An aerodynamic design method for generating low sonic-boom pressure signatures"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2000-02","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"19","bibliographicPageStart":"1","bibliographicVolumeNumber":"1406","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所報告"},{"bibliographic_title":"Technical Report of National Aerospace Laboratory","bibliographic_titleLang":"en"}]}]},"item_3_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"コンコルドに代わる次世代SST(超音速輸送機)開発における環境適合性に関する課題の1つに、ソニックブームの低減化が挙げられる。ソニックブームを低減化させる方法としては、機体形状を工夫することで地上で観測される圧力波形を一般的なN波ではなく低ブーム圧力波形として伝播させる設計法が考えられる。そのような設計法に従来用いられているのは幾何音響理論に衝撃波特有の非線形性を取り入れた修正線形理論であるF関数法であるが、この手法は衝撃波の整理統合過程や圧力波形の非線形的な歪みの効果を考慮することができる一方、機体近傍での強い衝撃波が持つ非線形性は考慮できなかった。また、F関数法は軸対称物体について構築された方法であるために、実際の3次元機体形状の持つ3次元性を考慮することができないという欠点も持つ。そこで本研究では、地上において目標とする低ブーム圧力波形となるような近傍場圧力波形を従来の修正線形理論から求めて、その波形から機体形状を求める逆問題を、近年発展が著しいCFD(計算流体力学)解析と最小2乗法を利用した最適化手法とを組み合わせて解く新しい低ブーム設計法を提案する。この設計法では3次元オイラーCFD解析コードを用いているため、機体の3次元性の効果や流れ場の非線形性を考慮した低ブーム設計が可能である。本研究では、この設計手法を用いて、線形理論により低ブーム設計された機体形状のソニックブーム強度をさらに低減することで、本設計手法が低ブーム設計に有効であることを示す。","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"A study was conducted of an aerodynamic design for the sonic-boom reduction of supersonic transport. Sonic-boom is one of the most important environmental problems for supersonic transport and methods for reduction of sonic-boom intensity have been published. These previous low sonic-boom design methods utilize the F-function method which is based on a linear theory. In comparison a new low sonic-boom design method is proposed in this study in order to deal with the nonlinear effects of the strong shocks near the aircraft and the three-dimensional effects of the aircraft configuration unable to be taken into account in the F-function method. This new low sonic-boom design method combines a three-dimensional Euler CFD (Computational Fluid Dynamics) code with a least-square optimization technique. The aircraft fuselage geometry is modified by this method in order to minimize the pressure differences between a pressure signature calculated by the CFD and a target low sonic-boom pressure signature produced in the near-field below the aircraft. This target near-field pressure signature is determined from the target low sonic-boom ground signature by utilizing the waveform parameter method. It will be demonstrated here that the sonic-boom intensity of the low sonic-boom aircraft configuration designed by the F-function method is reduced by this new low sonic-boom design method.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0001993000","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-1406","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 次世代航空機プロジェクト推進センター"},{"subitem_text_value":"航空宇宙技術研究所 流体科学総合研究グループ"},{"subitem_text_value":"航空宇宙技術研究所 計算科学研究部"},{"subitem_text_value":"東京大学 大学院工学系研究科"},{"subitem_text_value":"東京大学 大学院工学系研究科"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Advanced Technology Aircraft Project Center"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Fluid Science Research Center"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Computational Science Division"},{"subitem_text_language":"en","subitem_text_value":"University of Tokyo Graduate School of Engineering"},{"subitem_text_language":"en","subitem_text_value":"University of Tokyo Graduate School of Engineering"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"牧野, 好和"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"青山, 剛史"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"岩宮, 敏幸"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"綿貫, 忠晴"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"久保田, 弘敏"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Makino, Yoshikazu","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Aoyama, Takashi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Iwamiya, Toshiyuki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Watanuki, Tadaharu","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kubota, Hirotoshi","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":"2020-01-27"}],"displaytype":"detail","filename":"naltr0001406.pdf","filesize":[{"value":"495.0 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr0001406.pdf","url":"https://jaxa.repo.nii.ac.jp/record/40629/files/naltr0001406.pdf"},"version_id":"e0515f56-5b47-4ece-ad10-573b5542d1ff"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"超音速輸送","subitem_subject_scheme":"Other"},{"subitem_subject":"ソニックブーム低減","subitem_subject_scheme":"Other"},{"subitem_subject":"低ソニックブーム設計","subitem_subject_scheme":"Other"},{"subitem_subject":"ソニックブーム圧力波形","subitem_subject_scheme":"Other"},{"subitem_subject":"空力設計","subitem_subject_scheme":"Other"},{"subitem_subject":"最小2乗法","subitem_subject_scheme":"Other"},{"subitem_subject":"計算流体力学","subitem_subject_scheme":"Other"},{"subitem_subject":"最適化手法","subitem_subject_scheme":"Other"},{"subitem_subject":"機体形状","subitem_subject_scheme":"Other"},{"subitem_subject":"線形理論","subitem_subject_scheme":"Other"},{"subitem_subject":"supersonic transport","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"sonic boom reduction","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"low sonic boom design","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"sonic boom pressure waveform","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"aerodynamic design","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"least square method","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"computational fluid dynamics","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"optimization method","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"airframe shape","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"linear theory","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":"technical report","resourceuri":"http://purl.org/coar/resource_type/c_18gh"}]},"item_title":"低ソニックブーム圧力波形実現のための空力設計法に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"低ソニックブーム圧力波形実現のための空力設計法に関する研究"}]},"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":"40629","relation_version_is_last":true,"title":["低ソニックブーム圧力波形実現のための空力設計法に関する研究"],"weko_creator_id":"1","weko_shared_id":1},"updated":"2023-06-20T19:14:10.307365+00:00"}