{"created":"2022-01-27T04:31:52.640030+00:00","id":2003178,"links":{},"metadata":{"_buckets":{"deposit":"348f5b43-bfbe-4667-a31e-4d269cf4e6a9"},"_deposit":{"id":"2003178","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2003178"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02003178","sets":["1642837622505:1642837855274:1642837867211","1642838403551:1642838406845"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_1551255647225":"はく離・再付着流れの非定常構造に関する実験的研究","subitem_1551255648112":"ja"},{"subitem_1551255647225":"Experimental Study on Unsteady Stuctures in a Reattaching Separated Flow Field","subitem_1551255648112":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"照屋, 功","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"具志堅, 貴之","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"山里, 栄昭","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"伊良部, 邦夫","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"Teruya, Isao","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Gushiken, Takayuki","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Yamazato, Eisho","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Irabu, Kunio","creatorNameLang":"en"}]}]},"item_1617186476635":{"attribute_name":"Access Rights","attribute_value_mlt":[{"subitem_1522299639480":"open access","subitem_1600958577026":"http://purl.org/coar/access_right/c_abf2"}]},"item_1617186609386":{"attribute_name":"Subject","attribute_value_mlt":[{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Backward Facing Step"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Separation"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Reattachment"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Unsteady Structure"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Frequency Analysis"}]},"item_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"Separated and reattaching flow fields observed in engineering equipments are extremely complex because of its unsteadiness and three-dimensional structure. It is well known that of organized large-scale vortical structures appear in the separated shear layer.\\nThe purpose of this study is to explore experimentally the large-scale vortices in a separated and reattaching shear layer evolving from a backward facing step edge and to find the width of the free stream and the periodicity of motion of large-scale vortices.\\nIn this investigation, the reattachment length of the shear layer was determined based on the measurements with a thermal-tuft probe. The wall pressure and the velocity fluctuations were measured with a pressure sensor and an I type hot wire probe respectively. Those data were analyzed by a FFT analyzer.\\nThe obtained results are described as follows. (1) The reattachment length increases with the expansion ratio, W_2/W_1. When the distance X in the flow direction is normalized by the width of reattachment region ΔX_R, the forward flow fraction distributions at different expansion ratio, W_2/W_1, fall on one curve near the reattachment region. (2) According to analysis of the frequency of pressure fluctuations, the frequency of large-scale vortices is f・H/U_0=0.7, where H is height of the step. f is frequency and U_0 is velocity of the main flow. (3) the peak of power spectrum of the velocity fluctuations is f・H/U_0=0.3～0.5.","subitem_description_type":"Other"},{"subitem_description":"紀要論文","subitem_description_type":"Other"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_1522300295150":"ja","subitem_1522300316516":"琉球大学工学部"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_1551255818386":"jpn"}]},"item_1617186783814":{"attribute_name":"Identifier","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/20.500.12000/1998"}]},"item_1617186920753":{"attribute_name":"Source Identifier","attribute_value_mlt":[{"subitem_1522646500366":"ISSN","subitem_1522646572813":"0389-102X"},{"subitem_1522646500366":"NCID","subitem_1522646572813":"AN0025048X"}]},"item_1617186941041":{"attribute_name":"Source Title","attribute_value_mlt":[{"subitem_1522650068558":"ja","subitem_1522650091861":"琉球大学工学部紀要"}]},"item_1617187056579":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1992-09","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"44","bibliographicPageEnd":"20","bibliographicPageStart":"13"}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_1617265215918":{"attribute_name":"Version Type","attribute_value_mlt":[{"subitem_1522305645492":"VoR","subitem_1600292170262":"http://purl.org/coar/version/c_970fb48d4fbd8a85"}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","filename":"No44p13.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2003178/files/No44p13.pdf"},"version_id":"fa1dd976-755e-4d41-8eb6-f4e75c136873"}]},"item_title":"はく離・再付着流れの非定常構造に関する実験的研究","item_type_id":"15","owner":"1","path":["1642837867211","1642838406845"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2007-09-16"},"publish_date":"2007-09-16","publish_status":"0","recid":"2003178","relation_version_is_last":true,"title":["はく離・再付着流れの非定常構造に関する実験的研究"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-10-31T01:17:03.257082+00:00"}