{"created":"2025-08-18T12:00:11.705780+00:00","id":2001884,"links":{},"metadata":{"_buckets":{"deposit":"ef55b0e7-4d05-4393-b356-dc1250bb9205"},"_deposit":{"created_by":12,"id":"2001884","owners":[12],"pid":{"revision_id":0,"type":"depid","value":"2001884"},"status":"published"},"_oai":{"id":"oai:kyutech.repo.nii.ac.jp:02001884","sets":["8:24"]},"author_link":["14118"],"control_number":"2001884","item_1736914626247":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.1007/s00193-025-01239-z","subitem_relation_type_select":"DOI"}}]},"item_1736915800621":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0938-1287","subitem_source_identifier_type":"PISSN"},{"subitem_source_identifier":"1432-2153","subitem_source_identifier_type":"EISSN"}]},"item_1736918490417":{"attribute_name":"論文ID（連携）","attribute_value_mlt":[{"subitem_text_value":"10462771"}]},"item_1736918540808":{"attribute_name":"連携ID","attribute_value_mlt":[{"subitem_text_value":"14850"}]},"item_1736918590352":{"attribute_name":"研究者情報","attribute_value_mlt":[{"subitem_link_url":"https://hyokadb02.jimu.kyutech.ac.jp/html/20_ja.html"}]},"item_30002_bibliographic_information29":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2025-06-17","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"436","bibliographicPageStart":"423","bibliographicVolumeNumber":"35","bibliographic_titles":[{"bibliographic_title":"Shock Waves","bibliographic_titleLang":"en"}]}]},"item_30002_creator2":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Dixit, K.","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Kumar, R.R.","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Vadlamani, N.R.","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Tsuboi, Nobuyuki","creatorNameLang":"en"},{"creatorName":"坪井, 伸幸","creatorNameLang":"ja"}],"familyNames":[{"familyName":"Tsuboi","familyNameLang":"en"},{"familyName":"坪井","familyNameLang":"ja"}],"givenNames":[{"givenName":"Nobuyuki","givenNameLang":"en"},{"givenName":"伸幸","givenNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"14118","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"40342620","nameIdentifierScheme":"e-Rad_Researcher","nameIdentifierURI":"https://nrid.nii.ac.jp/ja/nrid/1000040342620"},{"nameIdentifier":"7007127548","nameIdentifierScheme":"Scopus著者ID","nameIdentifierURI":"https://www.scopus.com/authid/detail.uri?authorId=7007127548"},{"nameIdentifier":"20","nameIdentifierScheme":"九工大研究者情報","nameIdentifierURI":"https://hyokadb02.jimu.kyutech.ac.jp/html/20_ja.html"}]}]},"item_30002_description9":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Large-eddy simulations are conducted to investigate supersonic flow over a compression ramp at a free stream Mach number of 4.0 and a unit Reynolds number of 4.56×106 per meter. Two ramp angles of 15◦ and 18◦ are considered along with three different ramp positions (P1, P2, and P3) from the plate leading edge, with the plate length increasing progressively from P1 to P3. Simulations reveal that with an increase in the plate length and ramp angle, the separation point shifts downstream, accompanied by an extended separation length. Furthermore, with an increase in the ramp angle and plate length, a higher Görtler number is observed upstream of the reattachment indicating a greater likelihood of Görtler instability. In particular, no streamwise vortices were observed for the 15P1 and 15P2 cases, while for the 18P3 case, increased instability resulted in the breakdown of streamwise vortices, driving the transition to turbulence. The wavelength of streamwise streaks decreased by approximately 15% as the plate length increased by ≈ 80% from 18P1 to 18P3. Unsteady analysis revealed the role of spanwise secondary instabilities over these vortices, that trigger turbulent spots that propagate at a speed of ≈ 0.6U∞. The peak value of the Stanton number is found to be ≈ 15–27% higher than the time and span-averaged value for the 15P3 and 18P3 cases, highlighting a strong effect of downwash due to streamwise vortices on the wall heating rate distribution. The unsteady data also reveal a negative correlation between the flow reattachment location and the Stanton number close to the reattachment point. An earlier reattachment is shown to increase the Stanton number and vice versa resulting in a ≈ 40% variation compared to the time-averaged value. The results from this study underscore the critical influence of plate length on the formation of streamwise vortices, with significant implications for wall heating rate distribution and flow transition dynamics.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_30002_file35":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","filename":"10462771.pdf","filesize":[{"value":"1.9 MB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"url":"https://kyutech.repo.nii.ac.jp/record/2001884/files/10462771.pdf"},"version_id":"25f1c9f3-37a4-48a6-a983-14c74b5f263a"}]},"item_30002_funding_reference21":{"attribute_name":"助成情報","attribute_value_mlt":[{"subitem_funder_names":[{"subitem_funder_name":"National PARAM Supercomputing Facility","subitem_funder_name_language":"en"}]},{"subitem_funder_names":[{"subitem_funder_name":"Indian Institute of Technology Madras","subitem_funder_name_language":"en"}]},{"subitem_award_numbers":{"subitem_award_number":"JPMJFS2133","subitem_award_number_type":"JGN"},"subitem_funder_identifiers":{"subitem_funder_identifier":"https://doi.org/10.13039/501100002241","subitem_funder_identifier_type":"Crossref Funder"},"subitem_funder_names":[{"subitem_funder_name":"科学技術振興機構 (JST)","subitem_funder_name_language":"ja"},{"subitem_funder_name":"Japan Science and Technology Agency (JST)","subitem_funder_name_language":"en"}]}]},"item_30002_language12":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_30002_publisher10":{"attribute_name":"出版社","attribute_value_mlt":[{"subitem_publisher":"Springer","subitem_publisher_language":"en"}]},"item_30002_resource_type13":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_30002_rights6":{"attribute_name":"著作権関連情報","attribute_value_mlt":[{"subitem_rights":"Copyright (c) The Author(s) 2025. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.","subitem_rights_language":"en","subitem_rights_resource":"http://creativecommons.org/licenses/by/4.0/"}]},"item_30002_subject8":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Large-eddy simulations","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Centrifugal instabilities","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Supersonic flow","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Shock wave–boundary layer interaction","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Streamwise vortices","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Flow transition","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_30002_title0":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"A parametric analysis of streamwise vortices on a compression ramp at Mach 4","subitem_title_language":"en"}]},"item_30002_version_type15":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_title":"A parametric analysis of streamwise vortices on a compression ramp at Mach 4","item_type_id":"40001","owner":"12","path":["24"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2025-08-18"},"publish_date":"2025-08-18","publish_status":"0","recid":"2001884","relation_version_is_last":true,"title":["A parametric analysis of streamwise vortices on a compression ramp at Mach 4"],"weko_creator_id":"12","weko_shared_id":-1},"updated":"2025-08-19T05:13:00.141688+00:00"}