{"created":"2023-06-20T15:16:27.803635+00:00","id":46606,"links":{},"metadata":{"_buckets":{"deposit":"68129773-eb02-418e-9510-2cd010b59494"},"_deposit":{"created_by":1,"id":"46606","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"46606"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00046606","sets":["1887:1893","9:10:2065:2066"]},"author_link":["522116","522117","522118","522119"],"item_3_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Error Evaluation in JAXA Hypersonic Wind Tunnel Force Measurement Tests"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2020-07-31","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"54","bibliographicPageStart":"1","bibliographicVolumeNumber":"JAXA-RR-20-001","bibliographic_titles":[{"bibliographic_title":"宇宙航空研究開発機構研究開発報告"},{"bibliographic_title":"JAXA Research and Development Report","bibliographic_titleLang":"en"}]}]},"item_3_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"JAXA 1.27m/0.5m極超音速風洞試験6分力計測における誤差要因として一様流Mach数が変動する現象の確認されたことを受け、気流健全性確認のためのピトー圧のモニター計測結果を利用し、これまで不変と仮定して処理されていた一様流Mach数を、通風毎に推定・修正することで動圧推定及び空力係数計測精度の向上を試みた。その際に従来データ処理及びこの動圧修正処理に即した誤差伝播を整理したうえで、計測精度への効果の検証をこれまで継続的に行われてきていたHB2標準模型試験の結果をもとに行った。同時に、JAXA極超音速風洞での標準的計測における気流特性・推定誤差、計測誤差を整理し一般の6分力計測試験において期待される誤差推定方法を整理し、その妥当性確認を行った。更に気流の非一様性により発生する空気カ・モーメント計測における不確かさを、気流動圧分布の空間パワースペクトルと、模型形状情報とから予測する手法を開発し、その予測妥当性を標準模型試験結果を基に評価した。その結果、特に縦3分力における非一様性効果を予測することができることを確認した。横・方向特性に関する極超音速風洞試験における主要な誤差要因は一方で、一般に空気カ・モーメントの大きさが小さいため、動圧変動でも、非一様性の効果でもなく、天秤や模型座標の取付誤差に起因する、他分力の漏れである場合の多いことが考えられたため、風洞模型を取り付けた状態で、天秤に加わる重力を利用した天秤取付角度推定方法を新たに開発し、過去に実施された軸対称形状の標準模型試験に適用した。その結果、天秤取り付け角度推定結果を基に模型の気流に対する姿勢を補正することで、横・方向特性に関する主要誤差要因として、天秤・模型取り付け角度精度もあり得ることを確認した。","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"The free-stream Mach number of JAXA 1.27m/0.5m hypersonic wind tunnel had been reported to actually fluctuate between blows with a small extent which could still be one of the major error sources in aerodynamic coefficients reduced from measurements. The cause of the fluctuation still remains unclear, however, an attempt to remedy such the unexpected varying Mach number effect has been made by accounting representative dynamic pressure variation between blows with leveraging pitot pressure monitoring measurement which is originally for wind tunnel validity evaluation purposes. The effectiveness of the remedy has then been evaluated based on data acquired through HB2 standard model tests ever conducted in the facility, in accordance with the error propagation relation developed for the proposed procedure to determine the free-stream Mach number. Non-uniformity of the free-stream, however, cannot be accounted as an error source in the above uncertainty analysis, though previous M5 tests in the 0.5m hypersonic wind tunnel showed it actually has considerable effects, especially on the pitching moment coefficient. The mathematical formulation for estimating the error induced by the non-uniformity was then derived in terms of the three-dimensional spatial power spectrum of the pitot pressure ratio distribution and of the test model shape information, separately. Standard model test results where the test model was placed in different locations in the free-stream core region, agreed well with the estimated error from the non-uniformity, especially in the longitudinal aerodynamic characteristics, exhibiting the validity of the estimation formulation. One of major error sources in the lateral-directional characteristics in the facility, however, turned out to be alignment errors of the balance coordinate and of the model coordinate, after examining again aerodynamic characteristics obtained in the axisymmetric standard model and reorganizing them by correcting the model coordinate directions based on the balance alignment angles estimated from static tare data.","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: AA2030001000","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-RR-20-001","subitem_description_type":"Other"}]},"item_3_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.20637/00046594","subitem_identifier_reg_type":"JaLC"}]},"item_3_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宇宙航空研究開発機構(JAXA)"}]},"item_3_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Japan Aerospace Exploration Agency (JAXA)"}]},"item_3_source_id_22":{"attribute_name":"ISSNONLINE","attribute_value_mlt":[{"subitem_source_identifier":"2433-2216","subitem_source_identifier_type":"ISSN"}]},"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航空技術部門空力技術研究ユニット(JAXA)"},{"subitem_text_value":"宇宙航空研究開発機構航空技術部門空力技術研究ユニット(JAXA)"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Aerodynamics Research Unit, Aeronautical Technology Directorate, Japan Aerospace Exploration Agency (JAXA)"},{"subitem_text_language":"en","subitem_text_value":"Aerodynamics Research Unit, Aeronautical Technology Directorate, Japan Aerospace Exploration Agency (JAXA)"}]},"item_3_version_type_30":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"藤井, 啓介"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"高間, 良樹"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"FUJII, Keisuke","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"TAKAMA, Yoshiki","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":"2020-07-31"}],"displaytype":"detail","filename":"AA2030001000.pdf","filesize":[{"value":"7.7 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"AA2030001000.pdf","url":"https://jaxa.repo.nii.ac.jp/record/46606/files/AA2030001000.pdf"},"version_id":"cb2653c8-e987-4495-a348-3f6523f5bb2a"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Error in force measurements","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Mach number fluctuation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Non-uniformity","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Alignment error","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":"JAXA極超音速風洞における6分力計測試験に係る誤差評価について","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"JAXA極超音速風洞における6分力計測試験に係る誤差評価について"}]},"item_type_id":"3","owner":"1","path":["1893","2066"],"pubdate":{"attribute_name":"公開日","attribute_value":"2020-07-31"},"publish_date":"2020-07-31","publish_status":"0","recid":"46606","relation_version_is_last":true,"title":["JAXA極超音速風洞における6分力計測試験に係る誤差評価について"],"weko_creator_id":"1","weko_shared_id":1},"updated":"2023-06-20T20:00:48.638549+00:00"}