{"created":"2023-06-20T15:10:36.109630+00:00","id":40186,"links":{},"metadata":{"_buckets":{"deposit":"5640696e-a7f3-4082-aff5-cb339818d69d"},"_deposit":{"created_by":1,"id":"40186","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"40186"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00040186","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["446815","446812","446816","446817","446814","446813"],"item_3_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Study of turbulence spectra measurement technique using an LDV"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1998-01","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"13","bibliographicPageStart":"1","bibliographicVolumeNumber":"1346","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":"高速気流中の物体から発生する流体騒音発生メカニズムの基礎研究のため、レーザ流速計(LDV)による乱流音場の非接触スペクトル測定法の研究を行った。低騒音風洞の出口流速30〜50m/s中に設置した、直径10mmの円柱後流のカルマン渦列を含む乱流音場における乱流スペクトルの測定を試みた。ファイバを用いた遠隔型LDVプローブを用い、1測定点当たり10,000個のデータを20〜45KHzのサンプリングレートで収集・処理することによって、流れに擾乱を与えることなしにカルマン渦による離散周波数成分を含む騒音が発生源である乱流場のスペクトルが精度良く測定できた。光散乱粒子としてはスモークを用いた。音圧スペクトルと比較した結果、カルマン渦に起因する周波数成分において、両者は良く一致した。","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"A nondisturbance technique of measuring turbulent velocity spectra was studied to clarify the source of aerodynamic noise. In an anechoic wind tunnel, the continuous spectra of turbulent velocity in the wake of a cylinder of 10 mm diameter was measured over a range of mean velocity 30-50 m/s using an optical fiber-linked LDV (Laser Doppler Velocimeter) probe of 160 mm focal length. Accurate measurements of turbulence spectra due to Karman vortices were obtained by data sampling at 20-45 KHz for 10,000 samples at a measuring point. A smoke generator (Rosco Co.) was very useful for producing the seeding particles. Sound pressure spectra were measured and compared with the discrete frequency of the turbulent velocity.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0001443000","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-1346","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 原動機部"},{"subitem_text_value":"航空宇宙技術研究所 熱流体力学部"},{"subitem_text_value":"航空宇宙技術研究所 熱流体力学部"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Aeroengine Division"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Thermofluid Dynamics Division"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Thermofluid Dynamics Division"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"五味, 光男"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"武田, 克己"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"小林, 紘"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Gomi, Mitsuo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Takeda, Katsumi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kobayashi, Hiroshi","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":"naltr0001346.pdf","filesize":[{"value":"369.4 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr0001346.pdf","url":"https://jaxa.repo.nii.ac.jp/record/40186/files/naltr0001346.pdf"},"version_id":"6d0acf66-7e4d-48c6-b9e2-fc342245052c"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"流体騒音","subitem_subject_scheme":"Other"},{"subitem_subject":"高速気流","subitem_subject_scheme":"Other"},{"subitem_subject":"乱流音場","subitem_subject_scheme":"Other"},{"subitem_subject":"非接触測定法","subitem_subject_scheme":"Other"},{"subitem_subject":"乱流速度スペクトル","subitem_subject_scheme":"Other"},{"subitem_subject":"カルマン渦","subitem_subject_scheme":"Other"},{"subitem_subject":"低騒音風洞","subitem_subject_scheme":"Other"},{"subitem_subject":"音圧スペクトル","subitem_subject_scheme":"Other"},{"subitem_subject":"サンプリングレート","subitem_subject_scheme":"Other"},{"subitem_subject":"レーザ流速計","subitem_subject_scheme":"Other"},{"subitem_subject":"aerodynamic noise","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"high speed air flow","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"turbulence acoustic field","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"nondisturbance technique","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"turbulent velocity spectra","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Karman vortex","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"anechoic wind tunnel","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"sound pressure spectra","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"sampling rate","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"laser Doppler velocimeter","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":"LDVによる乱流音場のスペクトル測定法に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"LDVによる乱流音場のスペクトル測定法に関する研究"}]},"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":"40186","relation_version_is_last":true,"title":["LDVによる乱流音場のスペクトル測定法に関する研究"],"weko_creator_id":"1","weko_shared_id":1},"updated":"2023-06-20T19:16:43.399941+00:00"}