The interaction of vortices induced by a pair of microjets in the turbulent boundary layer
Experimental and numerical study of active and passive flow control are notable and highly practical subjects in aircraft and missiles. Fluid jets are invaluable tools for this purpose. Accordingly, the present study delves into the effects of a pair of air microjets on turbulent flow over a plate....
Gespeichert in:
| Veröffentlicht in: | Journal of visualization 2022-06, Vol.25 (3), p.449-465 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 465 |
|---|---|
| container_issue | 3 |
| container_start_page | 449 |
| container_title | Journal of visualization |
| container_volume | 25 |
| creator | Pour Razzaghi, Mohammad Javad Xu, Cheng Emamverdian, Aliakbar |
| description | Experimental and numerical study of active and passive flow control are notable and highly practical subjects in aircraft and missiles. Fluid jets are invaluable tools for this purpose. Accordingly, the present study delves into the effects of a pair of air microjets on turbulent flow over a plate. For this purpose, numerical model results were verified by experimental data of flow over a plate in the presence of a pair of air jets. Next, vortex formation, merging, and dissipation into the flow were studied at velocity ratio,
VR
= 4.0, by changing the spacing between the pair of jets and their orientations. The vortex position relative to the floor and other vortices, vortex intensity, flow velocity, Reynolds stresses in different directions, and pressure are discussed. The best vortex-merging results were found in a pair of co-directional jets (
d/D
= 10) condition. A pair of co-directional jets (
d/D
= 10) produced better results than opposite ones (
d/D
= 10—
ccr
). In the configuration with
d/D
= 10, the vortex intensity was nearly 80% higher than that of the single jet case. Further, the pair of jets pushed the post-jet pressure rise around 30 cm away.
Graphical abstract |
| doi_str_mv | 10.1007/s12650-021-00806-7 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2658833289</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2658833289</sourcerecordid><originalsourceid>FETCH-LOGICAL-c319t-f225f621c0d49752b55e580360db7042ae5448781cfad5517dc8fe7f31f4777d3</originalsourceid><addsrcrecordid>eNp9kE1LAzEQhoMoWKt_wFPAczSfm_QoxS8QvNSLl5BNJrql3a1JVui_N3UFb55mmHnfmZcHoUtGrxml-iYz3ihKKGeEUkMboo_QjBmtiFlodVx7IQUxdXCKznJe06qUms3Q2-oDcNcXSM6XbujxEPHXkErnIdd5GD0E3O6xwzvXpcN22_k0rKEc1rhUdxlTO26gL7gdxj64tMcbt4d0jk6i22S4-K1z9Hp_t1o-kueXh6fl7TPxgi0KiZyr2HDmaZA1K2-VAmWoaGhoNZXcgZLSaMN8dEEppoM3EXQULEqtdRBzdDXd3aXhc4Rc7HoYU19f2grFGCG4WVQVn1Q1fc4Jot2lblvDWkbtgaGdGNpKxv4wtLqaxGTKVdy_Q_o7_Y_rGw7BdDA</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2658833289</pqid></control><display><type>article</type><title>The interaction of vortices induced by a pair of microjets in the turbulent boundary layer</title><source>SpringerLink Journals</source><creator>Pour Razzaghi, Mohammad Javad ; Xu, Cheng ; Emamverdian, Aliakbar</creator><creatorcontrib>Pour Razzaghi, Mohammad Javad ; Xu, Cheng ; Emamverdian, Aliakbar</creatorcontrib><description>Experimental and numerical study of active and passive flow control are notable and highly practical subjects in aircraft and missiles. Fluid jets are invaluable tools for this purpose. Accordingly, the present study delves into the effects of a pair of air microjets on turbulent flow over a plate. For this purpose, numerical model results were verified by experimental data of flow over a plate in the presence of a pair of air jets. Next, vortex formation, merging, and dissipation into the flow were studied at velocity ratio,
VR
= 4.0, by changing the spacing between the pair of jets and their orientations. The vortex position relative to the floor and other vortices, vortex intensity, flow velocity, Reynolds stresses in different directions, and pressure are discussed. The best vortex-merging results were found in a pair of co-directional jets (
d/D
= 10) condition. A pair of co-directional jets (
d/D
= 10) produced better results than opposite ones (
d/D
= 10—
ccr
). In the configuration with
d/D
= 10, the vortex intensity was nearly 80% higher than that of the single jet case. Further, the pair of jets pushed the post-jet pressure rise around 30 cm away.
Graphical abstract</description><identifier>ISSN: 1343-8875</identifier><identifier>EISSN: 1875-8975</identifier><identifier>DOI: 10.1007/s12650-021-00806-7</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Active control ; Air jets ; Classical and Continuum Physics ; Computer Imaging ; Engineering ; Engineering Fluid Dynamics ; Engineering Thermodynamics ; Flow control ; Flow velocity ; Fluid flow ; Fluid jets ; Heat and Mass Transfer ; Jet aircraft ; Microjets ; Missiles ; Numerical models ; Pattern Recognition and Graphics ; Regular Paper ; Turbulent boundary layer ; Turbulent flow ; Vision ; Vortices</subject><ispartof>Journal of visualization, 2022-06, Vol.25 (3), p.449-465</ispartof><rights>The Visualization Society of Japan 2021</rights><rights>The Visualization Society of Japan 2021.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-f225f621c0d49752b55e580360db7042ae5448781cfad5517dc8fe7f31f4777d3</citedby><cites>FETCH-LOGICAL-c319t-f225f621c0d49752b55e580360db7042ae5448781cfad5517dc8fe7f31f4777d3</cites><orcidid>0000-0002-5023-6826</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s12650-021-00806-7$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12650-021-00806-7$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Pour Razzaghi, Mohammad Javad</creatorcontrib><creatorcontrib>Xu, Cheng</creatorcontrib><creatorcontrib>Emamverdian, Aliakbar</creatorcontrib><title>The interaction of vortices induced by a pair of microjets in the turbulent boundary layer</title><title>Journal of visualization</title><addtitle>J Vis</addtitle><description>Experimental and numerical study of active and passive flow control are notable and highly practical subjects in aircraft and missiles. Fluid jets are invaluable tools for this purpose. Accordingly, the present study delves into the effects of a pair of air microjets on turbulent flow over a plate. For this purpose, numerical model results were verified by experimental data of flow over a plate in the presence of a pair of air jets. Next, vortex formation, merging, and dissipation into the flow were studied at velocity ratio,
VR
= 4.0, by changing the spacing between the pair of jets and their orientations. The vortex position relative to the floor and other vortices, vortex intensity, flow velocity, Reynolds stresses in different directions, and pressure are discussed. The best vortex-merging results were found in a pair of co-directional jets (
d/D
= 10) condition. A pair of co-directional jets (
d/D
= 10) produced better results than opposite ones (
d/D
= 10—
ccr
). In the configuration with
d/D
= 10, the vortex intensity was nearly 80% higher than that of the single jet case. Further, the pair of jets pushed the post-jet pressure rise around 30 cm away.
Graphical abstract</description><subject>Active control</subject><subject>Air jets</subject><subject>Classical and Continuum Physics</subject><subject>Computer Imaging</subject><subject>Engineering</subject><subject>Engineering Fluid Dynamics</subject><subject>Engineering Thermodynamics</subject><subject>Flow control</subject><subject>Flow velocity</subject><subject>Fluid flow</subject><subject>Fluid jets</subject><subject>Heat and Mass Transfer</subject><subject>Jet aircraft</subject><subject>Microjets</subject><subject>Missiles</subject><subject>Numerical models</subject><subject>Pattern Recognition and Graphics</subject><subject>Regular Paper</subject><subject>Turbulent boundary layer</subject><subject>Turbulent flow</subject><subject>Vision</subject><subject>Vortices</subject><issn>1343-8875</issn><issn>1875-8975</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LAzEQhoMoWKt_wFPAczSfm_QoxS8QvNSLl5BNJrql3a1JVui_N3UFb55mmHnfmZcHoUtGrxml-iYz3ihKKGeEUkMboo_QjBmtiFlodVx7IQUxdXCKznJe06qUms3Q2-oDcNcXSM6XbujxEPHXkErnIdd5GD0E3O6xwzvXpcN22_k0rKEc1rhUdxlTO26gL7gdxj64tMcbt4d0jk6i22S4-K1z9Hp_t1o-kueXh6fl7TPxgi0KiZyr2HDmaZA1K2-VAmWoaGhoNZXcgZLSaMN8dEEppoM3EXQULEqtdRBzdDXd3aXhc4Rc7HoYU19f2grFGCG4WVQVn1Q1fc4Jot2lblvDWkbtgaGdGNpKxv4wtLqaxGTKVdy_Q_o7_Y_rGw7BdDA</recordid><startdate>20220601</startdate><enddate>20220601</enddate><creator>Pour Razzaghi, Mohammad Javad</creator><creator>Xu, Cheng</creator><creator>Emamverdian, Aliakbar</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-5023-6826</orcidid></search><sort><creationdate>20220601</creationdate><title>The interaction of vortices induced by a pair of microjets in the turbulent boundary layer</title><author>Pour Razzaghi, Mohammad Javad ; Xu, Cheng ; Emamverdian, Aliakbar</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c319t-f225f621c0d49752b55e580360db7042ae5448781cfad5517dc8fe7f31f4777d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Active control</topic><topic>Air jets</topic><topic>Classical and Continuum Physics</topic><topic>Computer Imaging</topic><topic>Engineering</topic><topic>Engineering Fluid Dynamics</topic><topic>Engineering Thermodynamics</topic><topic>Flow control</topic><topic>Flow velocity</topic><topic>Fluid flow</topic><topic>Fluid jets</topic><topic>Heat and Mass Transfer</topic><topic>Jet aircraft</topic><topic>Microjets</topic><topic>Missiles</topic><topic>Numerical models</topic><topic>Pattern Recognition and Graphics</topic><topic>Regular Paper</topic><topic>Turbulent boundary layer</topic><topic>Turbulent flow</topic><topic>Vision</topic><topic>Vortices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pour Razzaghi, Mohammad Javad</creatorcontrib><creatorcontrib>Xu, Cheng</creatorcontrib><creatorcontrib>Emamverdian, Aliakbar</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of visualization</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pour Razzaghi, Mohammad Javad</au><au>Xu, Cheng</au><au>Emamverdian, Aliakbar</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The interaction of vortices induced by a pair of microjets in the turbulent boundary layer</atitle><jtitle>Journal of visualization</jtitle><stitle>J Vis</stitle><date>2022-06-01</date><risdate>2022</risdate><volume>25</volume><issue>3</issue><spage>449</spage><epage>465</epage><pages>449-465</pages><issn>1343-8875</issn><eissn>1875-8975</eissn><abstract>Experimental and numerical study of active and passive flow control are notable and highly practical subjects in aircraft and missiles. Fluid jets are invaluable tools for this purpose. Accordingly, the present study delves into the effects of a pair of air microjets on turbulent flow over a plate. For this purpose, numerical model results were verified by experimental data of flow over a plate in the presence of a pair of air jets. Next, vortex formation, merging, and dissipation into the flow were studied at velocity ratio,
VR
= 4.0, by changing the spacing between the pair of jets and their orientations. The vortex position relative to the floor and other vortices, vortex intensity, flow velocity, Reynolds stresses in different directions, and pressure are discussed. The best vortex-merging results were found in a pair of co-directional jets (
d/D
= 10) condition. A pair of co-directional jets (
d/D
= 10) produced better results than opposite ones (
d/D
= 10—
ccr
). In the configuration with
d/D
= 10, the vortex intensity was nearly 80% higher than that of the single jet case. Further, the pair of jets pushed the post-jet pressure rise around 30 cm away.
Graphical abstract</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s12650-021-00806-7</doi><tpages>17</tpages><orcidid>https://orcid.org/0000-0002-5023-6826</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1343-8875 |
| ispartof | Journal of visualization, 2022-06, Vol.25 (3), p.449-465 |
| issn | 1343-8875 1875-8975 |
| language | eng |
| recordid | cdi_proquest_journals_2658833289 |
| source | SpringerLink Journals |
| subjects | Active control Air jets Classical and Continuum Physics Computer Imaging Engineering Engineering Fluid Dynamics Engineering Thermodynamics Flow control Flow velocity Fluid flow Fluid jets Heat and Mass Transfer Jet aircraft Microjets Missiles Numerical models Pattern Recognition and Graphics Regular Paper Turbulent boundary layer Turbulent flow Vision Vortices |
| title | The interaction of vortices induced by a pair of microjets in the turbulent boundary layer |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-08T11%3A21%3A53IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20interaction%20of%20vortices%20induced%20by%20a%20pair%20of%20microjets%20in%20the%20turbulent%20boundary%20layer&rft.jtitle=Journal%20of%20visualization&rft.au=Pour%20Razzaghi,%20Mohammad%20Javad&rft.date=2022-06-01&rft.volume=25&rft.issue=3&rft.spage=449&rft.epage=465&rft.pages=449-465&rft.issn=1343-8875&rft.eissn=1875-8975&rft_id=info:doi/10.1007/s12650-021-00806-7&rft_dat=%3Cproquest_cross%3E2658833289%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2658833289&rft_id=info:pmid/&rfr_iscdi=true |