{"created":"2023-06-20T15:08:01.860022+00:00","id":37422,"links":{},"metadata":{"_buckets":{"deposit":"6e492db1-db1a-4a34-a05a-ef79e7bce85b"},"_deposit":{"created_by":1,"id":"37422","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"37422"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00037422","sets":["1887:1891","1896:1898:1913:1915"]},"author_link":["480694","480693","480692","480695"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Study of transition to turbulence in a plane wake using a towing tunnel"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1999-11","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"86","bibliographicPageStart":"83","bibliographicVolumeNumber":"43","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所特別資料"},{"bibliographic_title":"Special Publicationa 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 7-9 Oct. 1998 (23th). 24-26 Mar. 1999 (24th) 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 7-9 Oct. 1998 (23th). 24-26 Mar. 1999 (24th) Tokyo Japan","subitem_description_type":"Other"}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"曳航風洞を用いた新しい実験方法により、平板後流での遷移機構を調べる実験研究を行った。平均速度分布の半値半幅に基づき、Re=300の後流を熱線プローブと線形安定性理論を用いて調べた。過渡的な後流における不安定モードが初期渦列を形成するが、Re=300の後流の大域的安定性から平板のすぐ下流では持続しないことが実験結果で明らかになった。定常な後流における不安定モードが初期渦列流の後に成長し、局所的な絶対不安定モードが後流の近くに現れる。絶対不安定モードと基本波モードの僅かな周波数の相違が周波数の低い擾乱の生成に作用する。それらは一般に自然遷移の後流のなかで見られる現象である。線形安定性理論の解析によって、Re=300での後流の中に存在する絶対的不安定領域の大きさは、臨界長(半値半幅の3倍)より小さいことが示された。この観察は、空間的に成長する後流について、絶対的に不安定な領域の大きさが後流の半値半幅の3倍より小さいときには、大きな欠損後流は大域的に安定であるというDNS(直接数値シミュレーション)の結果と良く一致することが示された。","subitem_description_type":"Abstract"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"An experimental study was conducted to investigate the transition mechanism in a plane wake using a novel experimental technique in a towing tunnel. The wake at Re = 300 based on the half-width of mean velocity profile was studied by means of moving hot-wire techniques and linear stability theory. The experimental results show that the instability mode in the tentative wake generates a starting vortex street but does not sustain itself behind flat plates because of a globally stable nature of the Re = 300 wake. The unstable mode in the steady wake grows after convection of the starting vortex street and the local absolutely instability mode appears in the near wake. The slight frequency difference between these modes affects the generation of low-frequency fluctuations, which are commonly observed in natural transition wakes. Linear stability analyses indicate that the size of absolutely instability region in the wake at Re = 300 is less than the critical length (three times the half-width). This observation shows a good agreement with the DNS (Direct Numerical Simulation) results of a spatially developing wake that large-deficit wakes are globally stable when the size of the absolutely unstable region is smaller than about three times the half-width of the wake.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0001960025","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-43","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":"電気通信大学 電気通信学部　知能機械工学科"},{"subitem_text_value":"電気通信大学 大学院"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"University of Electro-Communications Dept. of Mechanical Eng. & Intelligent Systems, Faculty of Electo-Communications"},{"subitem_text_language":"en","subitem_text_value":"University of Electro-Communications Graduate School"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"前川, 博"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"西村, 英樹"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Maekawa, Hiroshi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nishimura, Hideki","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":"nalsp0043025.pdf","filesize":[{"value":"728.4 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"nalsp0043025.pdf","url":"https://jaxa.repo.nii.ac.jp/record/37422/files/nalsp0043025.pdf"},"version_id":"43b2170a-a7f6-4e19-9f1b-f0ff85afd662"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"境界層遷移","subitem_subject_scheme":"Other"},{"subitem_subject":"曳航風洞","subitem_subject_scheme":"Other"},{"subitem_subject":"後流","subitem_subject_scheme":"Other"},{"subitem_subject":"乱流遷移","subitem_subject_scheme":"Other"},{"subitem_subject":"絶対不安定領域","subitem_subject_scheme":"Other"},{"subitem_subject":"線形安定性理論","subitem_subject_scheme":"Other"},{"subitem_subject":"渦列","subitem_subject_scheme":"Other"},{"subitem_subject":"速度欠損","subitem_subject_scheme":"Other"},{"subitem_subject":"平均速度分布","subitem_subject_scheme":"Other"},{"subitem_subject":"熱線プローブ","subitem_subject_scheme":"Other"},{"subitem_subject":"boundary layer transition","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"towing tunnel","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"wake","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"turbulence transition","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"absolutely unstable region","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"linear stability theory","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"vortex street","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"velocity deficiency","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"mean velocity profile","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"hot wire probe","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":"曳航風洞を用いた後流の乱流遷移の研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"曳航風洞を用いた後流の乱流遷移の研究"}]},"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":"37422","relation_version_is_last":true,"title":["曳航風洞を用いた後流の乱流遷移の研究"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:19:16.379391+00:00"}