Effect of tip clearance, winglets, and shroud height on the tip leakage in axial flow fans
•Winglets increase the efficiency of the partially shroud-covered axial fan.•Winglets decrease the efficiency of the 100% shroud-covered axial fan.•The fan efficiency is not the highest with 0 tip clearance in partial shroud.•The fan efficiency is the highest with certain tip clearance in partial sh...
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| Veröffentlicht in: | International journal of refrigeration 2018-09, Vol.93, p.195-204 |
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| container_title | International journal of refrigeration |
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| creator | Jung, Jae Hyuk Joo, Won-Gu |
| description | •Winglets increase the efficiency of the partially shroud-covered axial fan.•Winglets decrease the efficiency of the 100% shroud-covered axial fan.•The fan efficiency is not the highest with 0 tip clearance in partial shroud.•The fan efficiency is the highest with certain tip clearance in partial shroud.
This study is concerned with the improvement in efficiency of axial flow fans that are being used in numerous fields including outdoor units of air conditioners. The tip leakage flow occurring between a blade tip and shroud is one of the major losses in the axial flow fan. A well-known method used to control such tip leakage flow is locating winglet on the suction side of blade tips. Only a few articles have studied the impact of tip clearance on the flow structure of tip leakage flow of axial flow fans with winglet. In this study, the flow structure occurring on the blade tip due to the location of a winglet was analyzed. We confirm the existence of an optimal tip clearance which results in the maximum efficiency for an axial flow fan with a shroud height measuring 30% of the axial chord length. |
| doi_str_mv | 10.1016/j.ijrefrig.2018.07.010 |
| format | Article |
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This study is concerned with the improvement in efficiency of axial flow fans that are being used in numerous fields including outdoor units of air conditioners. The tip leakage flow occurring between a blade tip and shroud is one of the major losses in the axial flow fan. A well-known method used to control such tip leakage flow is locating winglet on the suction side of blade tips. Only a few articles have studied the impact of tip clearance on the flow structure of tip leakage flow of axial flow fans with winglet. In this study, the flow structure occurring on the blade tip due to the location of a winglet was analyzed. We confirm the existence of an optimal tip clearance which results in the maximum efficiency for an axial flow fan with a shroud height measuring 30% of the axial chord length.</description><identifier>ISSN: 0140-7007</identifier><identifier>EISSN: 1879-2081</identifier><identifier>DOI: 10.1016/j.ijrefrig.2018.07.010</identifier><language>eng</language><publisher>Paris: Elsevier Ltd</publisher><subject>Air conditioners ; Air conditioning ; Automobiles ; Axial flow ; Axial flow fan ; Blade tips ; CFD (computational fluid dynamics), Winglet ; CFD (mécanique numérique des fluides), Ailette ; Débit de la fuite d’extrémité ; Efficiency ; Jeu radial ; Leakage ; Rendement ; Suction ; Tip clearance ; Tip leakage flow ; Ventilateur axial ; Winglets</subject><ispartof>International journal of refrigeration, 2018-09, Vol.93, p.195-204</ispartof><rights>2018 Elsevier Ltd and IIR</rights><rights>Copyright Elsevier Science Ltd. Sep 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c340t-612b605d7dfcad3226d0489045357b365cfec9cfdbf42e6a3f09184857626ce03</citedby><cites>FETCH-LOGICAL-c340t-612b605d7dfcad3226d0489045357b365cfec9cfdbf42e6a3f09184857626ce03</cites><orcidid>0000-0003-3405-0463</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.ijrefrig.2018.07.010$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,45974</link.rule.ids></links><search><creatorcontrib>Jung, Jae Hyuk</creatorcontrib><creatorcontrib>Joo, Won-Gu</creatorcontrib><title>Effect of tip clearance, winglets, and shroud height on the tip leakage in axial flow fans</title><title>International journal of refrigeration</title><description>•Winglets increase the efficiency of the partially shroud-covered axial fan.•Winglets decrease the efficiency of the 100% shroud-covered axial fan.•The fan efficiency is not the highest with 0 tip clearance in partial shroud.•The fan efficiency is the highest with certain tip clearance in partial shroud.
This study is concerned with the improvement in efficiency of axial flow fans that are being used in numerous fields including outdoor units of air conditioners. The tip leakage flow occurring between a blade tip and shroud is one of the major losses in the axial flow fan. A well-known method used to control such tip leakage flow is locating winglet on the suction side of blade tips. Only a few articles have studied the impact of tip clearance on the flow structure of tip leakage flow of axial flow fans with winglet. In this study, the flow structure occurring on the blade tip due to the location of a winglet was analyzed. We confirm the existence of an optimal tip clearance which results in the maximum efficiency for an axial flow fan with a shroud height measuring 30% of the axial chord length.</description><subject>Air conditioners</subject><subject>Air conditioning</subject><subject>Automobiles</subject><subject>Axial flow</subject><subject>Axial flow fan</subject><subject>Blade tips</subject><subject>CFD (computational fluid dynamics), Winglet</subject><subject>CFD (mécanique numérique des fluides), Ailette</subject><subject>Débit de la fuite d’extrémité</subject><subject>Efficiency</subject><subject>Jeu radial</subject><subject>Leakage</subject><subject>Rendement</subject><subject>Suction</subject><subject>Tip clearance</subject><subject>Tip leakage flow</subject><subject>Ventilateur axial</subject><subject>Winglets</subject><issn>0140-7007</issn><issn>1879-2081</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqFkMtOwzAQRS0EEuXxC8gS2yaMncR2d6CqPKRKbGDDxnL9SBxCUuyUwt_jUlizms09d2YOQhcEcgKEXbW5b4N1wdc5BSJy4DkQOEATIvgsoyDIIZoAKSHjAPwYncTYAhAOlZigl4VzVo94cHj0a6w7q4LqtZ3ire_rzo5xilVvcGzCsDG4sb5uUrrHY2N_iAS8qtpi32P16VWHXTdssVN9PENHTnXRnv_OU_R8u3ia32fLx7uH-c0y00UJY8YIXTGoDDdOK1NQygyUYgZlVVR8VbBKpwNn2pmVK6llqnAwI6IUFWeUaQvFKbrc967D8L6xcZTtsAl9WikpKUhyQkqRUmyf0mGIMfmS6-DfVPiSBOTOo2zln0e58yiBy-Qxgdd70KYfPrwNMmpvkyLjQzInzeD_q_gGY4R-Vg</recordid><startdate>201809</startdate><enddate>201809</enddate><creator>Jung, Jae Hyuk</creator><creator>Joo, Won-Gu</creator><general>Elsevier Ltd</general><general>Elsevier Science Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><orcidid>https://orcid.org/0000-0003-3405-0463</orcidid></search><sort><creationdate>201809</creationdate><title>Effect of tip clearance, winglets, and shroud height on the tip leakage in axial flow fans</title><author>Jung, Jae Hyuk ; Joo, Won-Gu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c340t-612b605d7dfcad3226d0489045357b365cfec9cfdbf42e6a3f09184857626ce03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Air conditioners</topic><topic>Air conditioning</topic><topic>Automobiles</topic><topic>Axial flow</topic><topic>Axial flow fan</topic><topic>Blade tips</topic><topic>CFD (computational fluid dynamics), Winglet</topic><topic>CFD (mécanique numérique des fluides), Ailette</topic><topic>Débit de la fuite d’extrémité</topic><topic>Efficiency</topic><topic>Jeu radial</topic><topic>Leakage</topic><topic>Rendement</topic><topic>Suction</topic><topic>Tip clearance</topic><topic>Tip leakage flow</topic><topic>Ventilateur axial</topic><topic>Winglets</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jung, Jae Hyuk</creatorcontrib><creatorcontrib>Joo, Won-Gu</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><jtitle>International journal of refrigeration</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jung, Jae Hyuk</au><au>Joo, Won-Gu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of tip clearance, winglets, and shroud height on the tip leakage in axial flow fans</atitle><jtitle>International journal of refrigeration</jtitle><date>2018-09</date><risdate>2018</risdate><volume>93</volume><spage>195</spage><epage>204</epage><pages>195-204</pages><issn>0140-7007</issn><eissn>1879-2081</eissn><abstract>•Winglets increase the efficiency of the partially shroud-covered axial fan.•Winglets decrease the efficiency of the 100% shroud-covered axial fan.•The fan efficiency is not the highest with 0 tip clearance in partial shroud.•The fan efficiency is the highest with certain tip clearance in partial shroud.
This study is concerned with the improvement in efficiency of axial flow fans that are being used in numerous fields including outdoor units of air conditioners. The tip leakage flow occurring between a blade tip and shroud is one of the major losses in the axial flow fan. A well-known method used to control such tip leakage flow is locating winglet on the suction side of blade tips. Only a few articles have studied the impact of tip clearance on the flow structure of tip leakage flow of axial flow fans with winglet. In this study, the flow structure occurring on the blade tip due to the location of a winglet was analyzed. We confirm the existence of an optimal tip clearance which results in the maximum efficiency for an axial flow fan with a shroud height measuring 30% of the axial chord length.</abstract><cop>Paris</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ijrefrig.2018.07.010</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0003-3405-0463</orcidid></addata></record> |
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| ispartof | International journal of refrigeration, 2018-09, Vol.93, p.195-204 |
| issn | 0140-7007 1879-2081 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Air conditioners Air conditioning Automobiles Axial flow Axial flow fan Blade tips CFD (computational fluid dynamics), Winglet CFD (mécanique numérique des fluides), Ailette Débit de la fuite d’extrémité Efficiency Jeu radial Leakage Rendement Suction Tip clearance Tip leakage flow Ventilateur axial Winglets |
| title | Effect of tip clearance, winglets, and shroud height on the tip leakage in axial flow fans |
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