Control of flow separation on a contour bump by jets in a Mach 1.9 free-stream: An experimental study
Flow separation control over a three-dimensional contour bump using jet in a Mach 1.9 supersonic free-stream has been experimentally investigated using a transonic/supersonic wind tunnel. Jet total pressure in the range of 0–4bar was blowing at the valley of the contour bump. Schlieren photography,...
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| Veröffentlicht in: | Acta astronautica 2016-09, Vol.126, p.229-242 |
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| creator | Lo, Kin Hing Zare-Behtash, Hossein Kontis, Konstantinos |
| description | Flow separation control over a three-dimensional contour bump using jet in a Mach 1.9 supersonic free-stream has been experimentally investigated using a transonic/supersonic wind tunnel. Jet total pressure in the range of 0–4bar was blowing at the valley of the contour bump. Schlieren photography, surface oil flow visualisation and particle image velocimetry measurements were employed for flow visualisation and diagnostics. Experimental results show that blowing jet at the valley of the contour bump can hinder the formation and distort the spanwise vortices. The blowing jet can also reduce the extent of flow separation appears downstream of the bump crest. It was observed that this approach of flow control is more effective when high jet total pressure is employed. It is believed that a pressure gradient is generated as a result of the interaction between the flow downstream of the bump crest and the jet induced shock leads to the downwards flow motion around the bump valley. |
| doi_str_mv | 10.1016/j.actaastro.2016.04.033 |
| format | Article |
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Jet total pressure in the range of 0–4bar was blowing at the valley of the contour bump. Schlieren photography, surface oil flow visualisation and particle image velocimetry measurements were employed for flow visualisation and diagnostics. Experimental results show that blowing jet at the valley of the contour bump can hinder the formation and distort the spanwise vortices. The blowing jet can also reduce the extent of flow separation appears downstream of the bump crest. It was observed that this approach of flow control is more effective when high jet total pressure is employed. It is believed that a pressure gradient is generated as a result of the interaction between the flow downstream of the bump crest and the jet induced shock leads to the downwards flow motion around the bump valley.</description><identifier>ISSN: 0094-5765</identifier><identifier>EISSN: 1879-2030</identifier><identifier>DOI: 10.1016/j.actaastro.2016.04.033</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Active jet ; Blowing ; Blowing pressure ; Contour bump ; Diagnostic systems ; Downstream effects ; Particle image velocimetry ; Separation ; Shape ; Supersonic free-stream ; Valleys</subject><ispartof>Acta astronautica, 2016-09, Vol.126, p.229-242</ispartof><rights>2016 The Authors</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c430t-42cdeb64427cfbf933563f7e693641acef5c3c8cfdec98b7637efb4646cc63713</citedby><cites>FETCH-LOGICAL-c430t-42cdeb64427cfbf933563f7e693641acef5c3c8cfdec98b7637efb4646cc63713</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.actaastro.2016.04.033$$EHTML$$P50$$Gelsevier$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,3549,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Lo, Kin Hing</creatorcontrib><creatorcontrib>Zare-Behtash, Hossein</creatorcontrib><creatorcontrib>Kontis, Konstantinos</creatorcontrib><title>Control of flow separation on a contour bump by jets in a Mach 1.9 free-stream: An experimental study</title><title>Acta astronautica</title><description>Flow separation control over a three-dimensional contour bump using jet in a Mach 1.9 supersonic free-stream has been experimentally investigated using a transonic/supersonic wind tunnel. 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It is believed that a pressure gradient is generated as a result of the interaction between the flow downstream of the bump crest and the jet induced shock leads to the downwards flow motion around the bump valley.</description><subject>Active jet</subject><subject>Blowing</subject><subject>Blowing pressure</subject><subject>Contour bump</subject><subject>Diagnostic systems</subject><subject>Downstream effects</subject><subject>Particle image velocimetry</subject><subject>Separation</subject><subject>Shape</subject><subject>Supersonic free-stream</subject><subject>Valleys</subject><issn>0094-5765</issn><issn>1879-2030</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqNUcFq3DAQFaGBbDf5hujYix3JkmUrt2Vpk0JKL81ZyOMRsfFajiS33b-PNlt6bWFghpn33vB4hNxyVnLG1d1YWkjWxhR8WeVFyWTJhLggG942uqiYYB_IhjEti7pR9RX5GOPIGGuqVm8I7v2cmRP1jrrJ_6IRFxtsGvxMc1kK-e7XQLv1sNDuSEdMkQ6nyzcLL5SXmrqAWOT_aA_3dDdT_L1gGA44JzvRmNb-eE0unZ0i3vzpW_L85fOP_WPx9P3h6373VIAULBWygh47JWXVgOucFqJWwjWotFCSW0BXg4AWXI-g265RokHXSSUVQJ652JJPZ90l-NcVYzKHIQJOk53Rr9HwVtS1lrxu_wPKNReqEiJDmzMUgo8xoDNLtmfD0XBmThmY0fzNwJwyMEwa9s7cnZmYTf8cMJgIA86A_RAQkun98E-NN43SlDA</recordid><startdate>201609</startdate><enddate>201609</enddate><creator>Lo, Kin Hing</creator><creator>Zare-Behtash, Hossein</creator><creator>Kontis, Konstantinos</creator><general>Elsevier Ltd</general><scope>6I.</scope><scope>AAFTH</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>201609</creationdate><title>Control of flow separation on a contour bump by jets in a Mach 1.9 free-stream: An experimental study</title><author>Lo, Kin Hing ; Zare-Behtash, Hossein ; Kontis, Konstantinos</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c430t-42cdeb64427cfbf933563f7e693641acef5c3c8cfdec98b7637efb4646cc63713</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Active jet</topic><topic>Blowing</topic><topic>Blowing pressure</topic><topic>Contour bump</topic><topic>Diagnostic systems</topic><topic>Downstream effects</topic><topic>Particle image velocimetry</topic><topic>Separation</topic><topic>Shape</topic><topic>Supersonic free-stream</topic><topic>Valleys</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lo, Kin Hing</creatorcontrib><creatorcontrib>Zare-Behtash, Hossein</creatorcontrib><creatorcontrib>Kontis, Konstantinos</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Acta astronautica</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lo, Kin Hing</au><au>Zare-Behtash, Hossein</au><au>Kontis, Konstantinos</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Control of flow separation on a contour bump by jets in a Mach 1.9 free-stream: An experimental study</atitle><jtitle>Acta astronautica</jtitle><date>2016-09</date><risdate>2016</risdate><volume>126</volume><spage>229</spage><epage>242</epage><pages>229-242</pages><issn>0094-5765</issn><eissn>1879-2030</eissn><abstract>Flow separation control over a three-dimensional contour bump using jet in a Mach 1.9 supersonic free-stream has been experimentally investigated using a transonic/supersonic wind tunnel. 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| ispartof | Acta astronautica, 2016-09, Vol.126, p.229-242 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete - AutoHoldings |
| subjects | Active jet Blowing Blowing pressure Contour bump Diagnostic systems Downstream effects Particle image velocimetry Separation Shape Supersonic free-stream Valleys |
| title | Control of flow separation on a contour bump by jets in a Mach 1.9 free-stream: An experimental study |
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