Pressure loss mechanism analysed with pipe turbulence theory and friction coefficient prediction in labyrinth path of drip irrigation emitter
A labyrinth path is the predominant pattern for drip irrigation emitters at present. It is very important to explore the pressure loss mechanism for the labyrinth path. This paper took the Minkowski fractal curve flow path, a special labyrinth flow path, as an object to study the pressure loss mecha...
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| Veröffentlicht in: | Irrigation and drainage 2011-04, Vol.60 (2), p.179-186 |
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| creator | Yunkai, Li Peiling, Yang Honglu, Liu Tingwu, Xu Haisheng, Liu |
| description | A labyrinth path is the predominant pattern for drip irrigation emitters at present. It is very important to explore the pressure loss mechanism for the labyrinth path. This paper took the Minkowski fractal curve flow path, a special labyrinth flow path, as an object to study the pressure loss mechanism of fractal flow paths with dimension analysis technology and rough pipe turbulence theory. The results of the research showed that the Reynolds number has an insignificant effect on the friction coefficient of the flow path, which can be ignored. The friction coefficient was primarily related to the hydraulic radius, fractal dimension and unit length of the fractal flow path. Under the pressure of 15-150 kpa within the fractal flow path, the flow was completely turbulent. Hence, constructing the fractal flow path is an effective approach to simultaneously enhancing the hydraulic performance and anti-clogging performance. The critical Reynolds number for flow twist was moved earlier because of the continuous disturbance within the flow path of the emitters. Copyright © 2010 John Wiley & Sons, Ltd. |
| doi_str_mv | 10.1002/ird.553 |
| format | Article |
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It is very important to explore the pressure loss mechanism for the labyrinth path. This paper took the Minkowski fractal curve flow path, a special labyrinth flow path, as an object to study the pressure loss mechanism of fractal flow paths with dimension analysis technology and rough pipe turbulence theory. The results of the research showed that the Reynolds number has an insignificant effect on the friction coefficient of the flow path, which can be ignored. The friction coefficient was primarily related to the hydraulic radius, fractal dimension and unit length of the fractal flow path. Under the pressure of 15-150 kpa within the fractal flow path, the flow was completely turbulent. Hence, constructing the fractal flow path is an effective approach to simultaneously enhancing the hydraulic performance and anti-clogging performance. The critical Reynolds number for flow twist was moved earlier because of the continuous disturbance within the flow path of the emitters. Copyright © 2010 John Wiley & Sons, Ltd.</description><identifier>ISSN: 1531-0353</identifier><identifier>ISSN: 1531-0361</identifier><identifier>EISSN: 1531-0361</identifier><identifier>DOI: 10.1002/ird.553</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>coefficient de friction ; drip irrigation emitter ; emitters (equipment) ; flow path ; Flow paths ; Fluid dynamics ; Fluid flow ; Fractal analysis ; fractal dimensions ; Fractals ; Friction ; friction coefficient ; goutteur ; microirrigation ; perte de charge ; pipes ; prediction ; pressure loss ; trajet d'écoulement ; Turbulence ; Turbulent flow ; water flow</subject><ispartof>Irrigation and drainage, 2011-04, Vol.60 (2), p.179-186</ispartof><rights>Copyright © 2010 John Wiley & Sons, Ltd.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c3173-56731e8aa91916153662daf0a6b537e6f0532c95e4eb16dd16449443849ba09f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fird.553$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fird.553$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27923,27924,45573,45574</link.rule.ids></links><search><creatorcontrib>Yunkai, Li</creatorcontrib><creatorcontrib>Peiling, Yang</creatorcontrib><creatorcontrib>Honglu, Liu</creatorcontrib><creatorcontrib>Tingwu, Xu</creatorcontrib><creatorcontrib>Haisheng, Liu</creatorcontrib><title>Pressure loss mechanism analysed with pipe turbulence theory and friction coefficient prediction in labyrinth path of drip irrigation emitter</title><title>Irrigation and drainage</title><addtitle>Irrig. and Drain</addtitle><description>A labyrinth path is the predominant pattern for drip irrigation emitters at present. It is very important to explore the pressure loss mechanism for the labyrinth path. This paper took the Minkowski fractal curve flow path, a special labyrinth flow path, as an object to study the pressure loss mechanism of fractal flow paths with dimension analysis technology and rough pipe turbulence theory. The results of the research showed that the Reynolds number has an insignificant effect on the friction coefficient of the flow path, which can be ignored. The friction coefficient was primarily related to the hydraulic radius, fractal dimension and unit length of the fractal flow path. Under the pressure of 15-150 kpa within the fractal flow path, the flow was completely turbulent. Hence, constructing the fractal flow path is an effective approach to simultaneously enhancing the hydraulic performance and anti-clogging performance. The critical Reynolds number for flow twist was moved earlier because of the continuous disturbance within the flow path of the emitters. Copyright © 2010 John Wiley & Sons, Ltd.</description><subject>coefficient de friction</subject><subject>drip irrigation emitter</subject><subject>emitters (equipment)</subject><subject>flow path</subject><subject>Flow paths</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Fractal analysis</subject><subject>fractal dimensions</subject><subject>Fractals</subject><subject>Friction</subject><subject>friction coefficient</subject><subject>goutteur</subject><subject>microirrigation</subject><subject>perte de charge</subject><subject>pipes</subject><subject>prediction</subject><subject>pressure loss</subject><subject>trajet d'écoulement</subject><subject>Turbulence</subject><subject>Turbulent flow</subject><subject>water flow</subject><issn>1531-0353</issn><issn>1531-0361</issn><issn>1531-0361</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp10Mtu1TAQBuAIgUQpiEfAOxYoxY5jJ15CC6XoiFupYGc5zrhnILeOE5U8BO-MS6qyYjMzGn0aaf4seyr4keC8eInUHikl72UHQkmRc6nF_btZyYfZoxh_cM6NKaqD7PcnghgXAtaNMbIe_N4NGHvmBtetEVp2jfOeTTgBmxdqlg4Gn8Y9jLQm1LJA6GccB-ZHCAE9wjCziaC9XePAOteshMPNHZfKGFhLODEkwkv3F0GP8wz0OHsQXBfhyW0_zC7evvl6_C7ffTw9O361y70UlcyVrqSA2jkjjNDpNa2L1gXudKNkBTpwJQtvFJTQCN22QpelKUtZl6Zx3AR5mD3f7k40Xi0QZ9tj9NB1boBxibauJS-KUlX_pKeUD0GwE2HvaLWC25u8bcrbpryTfLHJa-xg_R-zZ19ONp1vGuMMv-60o582PVcp--3Dqf0uT3af37-u7XnyzzYf3GjdJWG0F-cFF5ILo5Q2XP4Bnkeb6Q</recordid><startdate>201104</startdate><enddate>201104</enddate><creator>Yunkai, Li</creator><creator>Peiling, Yang</creator><creator>Honglu, Liu</creator><creator>Tingwu, Xu</creator><creator>Haisheng, Liu</creator><general>John Wiley & Sons, Ltd</general><scope>FBQ</scope><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>201104</creationdate><title>Pressure loss mechanism analysed with pipe turbulence theory and friction coefficient prediction in labyrinth path of drip irrigation emitter</title><author>Yunkai, Li ; Peiling, Yang ; Honglu, Liu ; Tingwu, Xu ; Haisheng, Liu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3173-56731e8aa91916153662daf0a6b537e6f0532c95e4eb16dd16449443849ba09f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>coefficient de friction</topic><topic>drip irrigation emitter</topic><topic>emitters (equipment)</topic><topic>flow path</topic><topic>Flow paths</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Fractal analysis</topic><topic>fractal dimensions</topic><topic>Fractals</topic><topic>Friction</topic><topic>friction coefficient</topic><topic>goutteur</topic><topic>microirrigation</topic><topic>perte de charge</topic><topic>pipes</topic><topic>prediction</topic><topic>pressure loss</topic><topic>trajet d'écoulement</topic><topic>Turbulence</topic><topic>Turbulent flow</topic><topic>water flow</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yunkai, Li</creatorcontrib><creatorcontrib>Peiling, Yang</creatorcontrib><creatorcontrib>Honglu, Liu</creatorcontrib><creatorcontrib>Tingwu, Xu</creatorcontrib><creatorcontrib>Haisheng, Liu</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Irrigation and drainage</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yunkai, Li</au><au>Peiling, Yang</au><au>Honglu, Liu</au><au>Tingwu, Xu</au><au>Haisheng, Liu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pressure loss mechanism analysed with pipe turbulence theory and friction coefficient prediction in labyrinth path of drip irrigation emitter</atitle><jtitle>Irrigation and drainage</jtitle><addtitle>Irrig. and Drain</addtitle><date>2011-04</date><risdate>2011</risdate><volume>60</volume><issue>2</issue><spage>179</spage><epage>186</epage><pages>179-186</pages><issn>1531-0353</issn><issn>1531-0361</issn><eissn>1531-0361</eissn><abstract>A labyrinth path is the predominant pattern for drip irrigation emitters at present. It is very important to explore the pressure loss mechanism for the labyrinth path. This paper took the Minkowski fractal curve flow path, a special labyrinth flow path, as an object to study the pressure loss mechanism of fractal flow paths with dimension analysis technology and rough pipe turbulence theory. The results of the research showed that the Reynolds number has an insignificant effect on the friction coefficient of the flow path, which can be ignored. The friction coefficient was primarily related to the hydraulic radius, fractal dimension and unit length of the fractal flow path. Under the pressure of 15-150 kpa within the fractal flow path, the flow was completely turbulent. Hence, constructing the fractal flow path is an effective approach to simultaneously enhancing the hydraulic performance and anti-clogging performance. The critical Reynolds number for flow twist was moved earlier because of the continuous disturbance within the flow path of the emitters. Copyright © 2010 John Wiley & Sons, Ltd.</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><doi>10.1002/ird.553</doi><tpages>8</tpages></addata></record> |
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| subjects | coefficient de friction drip irrigation emitter emitters (equipment) flow path Flow paths Fluid dynamics Fluid flow Fractal analysis fractal dimensions Fractals Friction friction coefficient goutteur microirrigation perte de charge pipes prediction pressure loss trajet d'écoulement Turbulence Turbulent flow water flow |
| title | Pressure loss mechanism analysed with pipe turbulence theory and friction coefficient prediction in labyrinth path of drip irrigation emitter |
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