{"created":"2023-06-20T14:36:15.534612+00:00","id":2569,"links":{},"metadata":{"_buckets":{"deposit":"b676d7c8-be8f-4c10-9592-f6060190c389"},"_deposit":{"created_by":1,"id":"2569","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2569"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00002569","sets":["1887:1893","9:1090:1210:1221"]},"author_link":["7321","7320","7322","7319"],"item_3_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Feasibility Study of Windbreak Walls to Improve the Wind Conditions in Outdoor Static Engine Noise Tests"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2010-09-30","bibliographicIssueDateType":"Issued"},"bibliographicVolumeNumber":"JAXA-RM-10-009","bibliographic_titles":[{"bibliographic_title":"宇宙航空研究開発機構研究開発資料"},{"bibliographic_title":"JAXA Research and Development Memorandum","bibliographic_titleLang":"en"}]}]},"item_3_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"航空機用ジェットエンジン（以後，エンジン）の屋外騒音試験は，主に低騒音化技術の実証や，航空機の離着陸時の騒音評価に必要な遠距離場騒音特性データを取得するために行われる．商業運航を行う民間航空機はFAA（米国連邦航空局）やICAO（国際民間航空機関）が定める国際的な騒音基準を満足する必要があることから，この基準への適合可否に関わる騒音データの信頼性を確保するうえで試験場や試験方法等について技術基準が定められている．その中に騒音計測時の風に関する制限がある．風は，時として制限を越えて試験の実施を妨げ，エンジン開発プロジェクトや研究活動の円滑な遂行に影響を及ぼす．このため積極的に試験場内の空気の流れを改善し騒音計測に適した環境を確保する風環境改善技術は，将来期待される国産商用エンジンの研究開発を円滑に進めるうえで有用な試験技術と考えられる．風環境の改善方法として，防風対策として一般的な防風壁の適用について，CFD解析により空力的な面から実現性および課題を調査した．いくつかの特徴的な防風壁形態について防風壁内の流れを解析し防風効果を評価した．その結果，エンジンを中心とした円周上に通気性のない壁を設置し，エンジン排気流と干渉する壁を部分的に取り除いた形態が風環境の改善方法として実現性が高いことが明らかとなった．しかし，この形態でも防風効果が風向により限定的でさらなる改善が必要なことも今後の課題として明らかとなった．本資料は，関連する技術基準等について整理したうえで，CFD解析による調査内容および結果についてまとめた．","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"Outdoor static engine noise tests for aircraft noise certification or verification of developing engine noise reduction technologies are required to be conducted under the limited wind conditions to maintain the reliability of the measured far field noise data. In some cases, the uncontrollable wind can be the major factor which causes the delay of engine development projects or noise reduction technology research programs. In order to minimize the risk, the feasibility of windbreak walls to improve the acoustical arena wind conditions was studied by Computer Fluid Dynamics (CFD) analysis. Several configurations of windbreak walls were parametrically analyzed and evaluated. As a result of the analysis, it was found that some windbreak wall configurations had the possibility to improve the acoustical arena wind conditions, but did not have enough windbreak effect against the crosswind from specific directions. Further study is necessary to find more feasible and practical windbreak wall configurations.","subitem_description_type":"Other"}]},"item_3_description_18":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"形態: カラー図版あり","subitem_description_type":"Other"}]},"item_3_description_19":{"attribute_name":"内容記述（英）","attribute_value_mlt":[{"subitem_description":"Physical characteristics: Original contains color illustrations","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0064757000","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: JAXA-RM-10-009","subitem_description_type":"Other"}]},"item_3_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宇宙航空研究開発機構"}]},"item_3_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Japan Aerospace Exploration Agency (JAXA)"}]},"item_3_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1349-1121","subitem_source_identifier_type":"ISSN"}]},"item_3_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA11983593","subitem_source_identifier_type":"NCID"}]},"item_3_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"宇宙航空研究開発機構研究開発本部ジェットエンジン技術研究センター"},{"subitem_text_value":"宇宙航空研究開発機構研究開発本部ジェットエンジン技術研究センター"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Jet Engine Technology Research Center, Aerospace Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA)"},{"subitem_text_language":"en","subitem_text_value":"Jet Engine Technology Research Center, Aerospace Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA)"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"仲田, 靖"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"賀澤, 順一"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nakata, Yasushi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kazawa, Junichi","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":"2020-01-15"}],"displaytype":"detail","filename":"64757000.pdf","filesize":[{"value":"16.0 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"64757000.pdf","url":"https://jaxa.repo.nii.ac.jp/record/2569/files/64757000.pdf"},"version_id":"bc53a33d-183b-433d-bccc-3e9582a28d3a"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Aircraft Engine Noise, Turbofan Engine, Static Engine Noise Test, Far Field Noise Measurement, Wind Limits, Sound Propagation, Refraction, Acoustic Shadow, Windbreak Wall, CFD","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":"屋外エンジン騒音試験における防風壁による風環境改善の実現性の検討","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"屋外エンジン騒音試験における防風壁による風環境改善の実現性の検討"}]},"item_type_id":"3","owner":"1","path":["1221","1893"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"2569","relation_version_is_last":true,"title":["屋外エンジン騒音試験における防風壁による風環境改善の実現性の検討"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-21T09:19:52.618879+00:00"}