{"created":"2023-06-20T15:08:06.316014+00:00","id":37493,"links":{},"metadata":{"_buckets":{"deposit":"4b1761b1-53d4-4b89-ba31-b40e3af4d387"},"_deposit":{"created_by":1,"id":"37493","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"37493"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00037493","sets":["1887:1891","1896:1898:1913:1915"]},"author_link":["481106","481105"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Shock enhanced mixing in turbulent shear flow: Comparison of 2-D and 3-D"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1999-12","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"380","bibliographicPageStart":"375","bibliographicVolumeNumber":"44","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所特別資料"},{"bibliographic_title":"Special Publication 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 16-18 Jun. 1999 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 16-18 Jun. 1999 Tokyo Japan","subitem_description_type":"Other"}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"前報で、ヘリウムジェットの場合に限るのであるが、垂直衝撃波の通過による圧力の不連続と2次元乱流剪断流による密度勾配との結合によって作られるバロクリニックなトルクの影響がジェット中心線わきに渦構造を誘起し、混合を促進する細かい模様を誘起することを確認した。本報では、次の段階として、3次元構造を選んだ。2方程式(q-omega)乱流モデルを用い、N-S(ナビエ・ストークス)方程式と化学種の拡散方程式で構成される支配方程式系および風上TVD(全変動減少)方程式化とLU-ADI(Lower and Upper-Alternating Direction Implicit)近似因子化を用いた差分計算法を使って、3種類のジェット(空気、2酸化炭素、ヘリウム)の間で混合促進の特性を比較した。3次元ジェット入口擾乱特性を2次元シミュレーションの場合と同値としたため、平面の場合よりも周辺空気とジェットとの間でより広い相互作用断面をもつ円錐剪断層内の混合割合を増加させるので、剪断層は樽型になり、すべてのジェットの場合において密度勾配が鈍くなった。このためバロクリニックなトルクが弱くなり、垂直衝撃波が通過した後に明瞭な渦構造が現れずに、混合促進は弱いものしか得られなかった。ジェット入口での乱れ特性の改良が不可欠なことが分かった。","subitem_description_type":"Abstract"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"In the former report the effect of baroclinic torque, which is produced by a combination of pressure discontinuity by normal shock wave passing and density gradient through a two-dimensional turbulent shear flow, is confirmed to induce vortical structure beside a jet center line and to achieve a fine character of mixing enhancement for only helium jet case. In this paper a three-dimensional configuration is adopted as next step. Both a governing equation system, which is constructed by N-S (Navier-Stokes) equation and chemical species diffusion equations with two-equation (q-omega) type turbulent model, and a differential calculation technique, which gathers upwind TVD (Total Variation Diminishing) formation and LU-ADI (Lower and Upper-Alternating Direction Implicit) approximate factorization, are employed for a comparison of mixing enhancement performances among three chemical kinds of jet (air, carbon dioxide, helium). Since the three- dimensional jet inlet turbulent properties, which are same values as the two- dimensional simulation, increase mixing rate within the conical shear layer having larger interaction section between jet and ambient air than that of the planer case, the shear layer takes barrel shape and the gradient of density becomes blunt for all jet cases. Then, the baroclinic torque is weakened, the distinctive vortical structure is not appeared after normal shock wave passing and only poor mixing enhancement is obtained. An improvement of turbulent properties at inlet of jet is strongly required.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0001961060","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-44","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":"防衛大学校"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"National Defense Academy"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"小幡, 茂男"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Obata, Shigeo","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":"nalsp0044060.pdf","filesize":[{"value":"598.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"nalsp0044060.pdf","url":"https://jaxa.repo.nii.ac.jp/record/37493/files/nalsp0044060.pdf"},"version_id":"99653345-464c-48e7-9f41-6f01611cb91d"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"バロクリニックトルク","subitem_subject_scheme":"Other"},{"subitem_subject":"衝撃波","subitem_subject_scheme":"Other"},{"subitem_subject":"密度勾配","subitem_subject_scheme":"Other"},{"subitem_subject":"乱流剪断流","subitem_subject_scheme":"Other"},{"subitem_subject":"ナビエ・ストークス方程式","subitem_subject_scheme":"Other"},{"subitem_subject":"化学種拡散式","subitem_subject_scheme":"Other"},{"subitem_subject":"TVD法","subitem_subject_scheme":"Other"},{"subitem_subject":"全変動減少法","subitem_subject_scheme":"Other"},{"subitem_subject":"LU-ADI法","subitem_subject_scheme":"Other"},{"subitem_subject":"上下交互方向陰解法","subitem_subject_scheme":"Other"},{"subitem_subject":"baroclinic torque","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"shock wave","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"density gradient","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"turbulent shear flow","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Navier Stokes equation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"chemical species diffusion equation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"TVD formulation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"total variation diminishing method","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"LU ADI method","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"lower and upper alternating direction implicit method","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":"衝撃波による乱流剪断流混合促進:ニ次元と三次元","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"衝撃波による乱流剪断流混合促進:ニ次元と三次元"}]},"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":"37493","relation_version_is_last":true,"title":["衝撃波による乱流剪断流混合促進:ニ次元と三次元"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:17:34.191063+00:00"}