Numerical Calculations on Flow and Heat Transfer in Smooth and Ribbed Two-Pass Square Channels under Rotational Effects
U-shaped channel, which is also called two-pass channel, commonly exists in gas turbine internal coolant passages. Ribbed walls are frequently adopted in internal passage to enhance the heat transfer. Considering the rotational condition of gas turbine blade on operation, the effect of rotation is a...
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| Veröffentlicht in: | Mathematical problems in engineering 2014-01, Vol.2014 (1) |
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| creator | Shen, Zhongyang Xie, Yonghui Zhang, Di Xie, Gongnan |
| description | U-shaped channel, which is also called two-pass channel, commonly exists in gas turbine internal coolant passages. Ribbed walls are frequently adopted in internal passage to enhance the heat transfer. Considering the rotational condition of gas turbine blade on operation, the effect of rotation is also investigated for the coolant channel which is close to real operation condition. Thus, the objective of this study is to discuss the effect of rotation on fluid flow and heat transfer performance of U-shaped channel with ribbed walls under high rotational numbers. Investigated Reynolds number is Re = 12500 and the rotation numbers are Ro b = 0.4 and 0.6. In the results, the spatially heat transfer coefficient distributions are exhibited to discuss the effect of rotation and roughened walls. It is found that ribbed walls enhance the heat transfer rate significantly. Under the rotational condition, the Nu in the first pass with outward flow is increased while that in the second pass is decreased. Finally, average Nu ratio, friction ratio, and thermal performance are all presented to discuss the thermal characteristics. |
| doi_str_mv | 10.1155/2014/981376 |
| format | Article |
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Ribbed walls are frequently adopted in internal passage to enhance the heat transfer. Considering the rotational condition of gas turbine blade on operation, the effect of rotation is also investigated for the coolant channel which is close to real operation condition. Thus, the objective of this study is to discuss the effect of rotation on fluid flow and heat transfer performance of U-shaped channel with ribbed walls under high rotational numbers. Investigated Reynolds number is Re = 12500 and the rotation numbers are Ro b = 0.4 and 0.6. In the results, the spatially heat transfer coefficient distributions are exhibited to discuss the effect of rotation and roughened walls. It is found that ribbed walls enhance the heat transfer rate significantly. Under the rotational condition, the Nu in the first pass with outward flow is increased while that in the second pass is decreased. Finally, average Nu ratio, friction ratio, and thermal performance are all presented to discuss the thermal characteristics.</description><identifier>ISSN: 1024-123X</identifier><identifier>EISSN: 1563-5147</identifier><identifier>DOI: 10.1155/2014/981376</identifier><language>eng</language><publisher>New York: Hindawi Publishing Corporation</publisher><subject>Channels ; Computational fluid dynamics ; Coolants ; Cooling ; Finite element analysis ; Fluid dynamics ; Fluid flow ; Gas turbine engines ; Gas turbines ; Heat transfer ; Heat transfer coefficients ; Mathematical models ; Mathematical problems ; Numerical analysis ; Product introduction ; Reynolds number ; Rotating fluids ; Rotation ; Rotational ; Studies ; Turbine blades ; Turbulence models ; Walls</subject><ispartof>Mathematical problems in engineering, 2014-01, Vol.2014 (1)</ispartof><rights>Copyright © 2014 Zhongyang Shen et al.</rights><rights>Copyright © 2014 Zhongyang Shen et al. Zhongyang Shen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c366t-1c421d886e539b12b9c642e52714e45ab3dd9e21bcaab8d322fa6293d95a348c3</citedby><cites>FETCH-LOGICAL-c366t-1c421d886e539b12b9c642e52714e45ab3dd9e21bcaab8d322fa6293d95a348c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,778,782,27907,27908</link.rule.ids></links><search><contributor>Zhang, Haochun</contributor><creatorcontrib>Shen, Zhongyang</creatorcontrib><creatorcontrib>Xie, Yonghui</creatorcontrib><creatorcontrib>Zhang, Di</creatorcontrib><creatorcontrib>Xie, Gongnan</creatorcontrib><title>Numerical Calculations on Flow and Heat Transfer in Smooth and Ribbed Two-Pass Square Channels under Rotational Effects</title><title>Mathematical problems in engineering</title><description>U-shaped channel, which is also called two-pass channel, commonly exists in gas turbine internal coolant passages. Ribbed walls are frequently adopted in internal passage to enhance the heat transfer. Considering the rotational condition of gas turbine blade on operation, the effect of rotation is also investigated for the coolant channel which is close to real operation condition. Thus, the objective of this study is to discuss the effect of rotation on fluid flow and heat transfer performance of U-shaped channel with ribbed walls under high rotational numbers. Investigated Reynolds number is Re = 12500 and the rotation numbers are Ro b = 0.4 and 0.6. In the results, the spatially heat transfer coefficient distributions are exhibited to discuss the effect of rotation and roughened walls. It is found that ribbed walls enhance the heat transfer rate significantly. Under the rotational condition, the Nu in the first pass with outward flow is increased while that in the second pass is decreased. Finally, average Nu ratio, friction ratio, and thermal performance are all presented to discuss the thermal characteristics.</description><subject>Channels</subject><subject>Computational fluid dynamics</subject><subject>Coolants</subject><subject>Cooling</subject><subject>Finite element analysis</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Gas turbine engines</subject><subject>Gas turbines</subject><subject>Heat transfer</subject><subject>Heat transfer coefficients</subject><subject>Mathematical models</subject><subject>Mathematical problems</subject><subject>Numerical analysis</subject><subject>Product introduction</subject><subject>Reynolds number</subject><subject>Rotating fluids</subject><subject>Rotation</subject><subject>Rotational</subject><subject>Studies</subject><subject>Turbine blades</subject><subject>Turbulence models</subject><subject>Walls</subject><issn>1024-123X</issn><issn>1563-5147</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>RHX</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp90ctKxDAUBuAiCl5XvkDAjSjVnNzaLGXwBqLijOCunCYp06GTaNIy-PZ2Zly5cJUD-c4F_iw7BXoFIOU1oyCudQm8UDvZAUjFcwmi2B1rykQOjH_sZ4cpLShlIKE8yFbPw9LF1mBHJtiZocO-DT6R4MldF1YEvSUPDnsyi-hT4yJpPZkuQ-jnm7-3tq6dJbNVyF8xJTL9GjA6Mpmj965LZPB27HkL_WbuuOW2aZzp03G212CX3Mnve5S9393OJg_508v94-TmKTdcqT4HIxjYslROcl0Dq7VRgjnJChBOSKy5tdoxqA1iXVrOWIOKaW61RC5Kw4-y8-3czxi-Bpf6atkm47oOvQtDqkAxSgvNCjnSsz90EYY43jwqKQoNSlM2qsutMjGkFF1TfcZ2ifG7AlqtQ6jWIVTbEEZ9sdXz1ltctf_iHwiihbw</recordid><startdate>20140101</startdate><enddate>20140101</enddate><creator>Shen, Zhongyang</creator><creator>Xie, Yonghui</creator><creator>Zhang, Di</creator><creator>Xie, Gongnan</creator><general>Hindawi Publishing Corporation</general><general>Hindawi Limited</general><scope>RHU</scope><scope>RHW</scope><scope>RHX</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>CWDGH</scope><scope>DWQXO</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JQ2</scope><scope>K7-</scope><scope>KR7</scope><scope>L6V</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20140101</creationdate><title>Numerical Calculations on Flow and Heat Transfer in Smooth and Ribbed Two-Pass Square Channels under Rotational Effects</title><author>Shen, Zhongyang ; Xie, Yonghui ; Zhang, Di ; Xie, Gongnan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c366t-1c421d886e539b12b9c642e52714e45ab3dd9e21bcaab8d322fa6293d95a348c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Channels</topic><topic>Computational fluid dynamics</topic><topic>Coolants</topic><topic>Cooling</topic><topic>Finite element analysis</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Gas turbine engines</topic><topic>Gas turbines</topic><topic>Heat transfer</topic><topic>Heat transfer coefficients</topic><topic>Mathematical models</topic><topic>Mathematical problems</topic><topic>Numerical analysis</topic><topic>Product introduction</topic><topic>Reynolds number</topic><topic>Rotating fluids</topic><topic>Rotation</topic><topic>Rotational</topic><topic>Studies</topic><topic>Turbine blades</topic><topic>Turbulence models</topic><topic>Walls</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shen, Zhongyang</creatorcontrib><creatorcontrib>Xie, Yonghui</creatorcontrib><creatorcontrib>Zhang, Di</creatorcontrib><creatorcontrib>Xie, Gongnan</creatorcontrib><collection>Hindawi Publishing Complete</collection><collection>Hindawi Publishing Subscription Journals</collection><collection>Hindawi Publishing Open Access</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>Middle East & Africa Database</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Computer Science Collection</collection><collection>Computer Science Database</collection><collection>Civil Engineering Abstracts</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><jtitle>Mathematical problems in engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shen, Zhongyang</au><au>Xie, Yonghui</au><au>Zhang, Di</au><au>Xie, Gongnan</au><au>Zhang, Haochun</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Numerical Calculations on Flow and Heat Transfer in Smooth and Ribbed Two-Pass Square Channels under Rotational Effects</atitle><jtitle>Mathematical problems in engineering</jtitle><date>2014-01-01</date><risdate>2014</risdate><volume>2014</volume><issue>1</issue><issn>1024-123X</issn><eissn>1563-5147</eissn><abstract>U-shaped channel, which is also called two-pass channel, commonly exists in gas turbine internal coolant passages. Ribbed walls are frequently adopted in internal passage to enhance the heat transfer. Considering the rotational condition of gas turbine blade on operation, the effect of rotation is also investigated for the coolant channel which is close to real operation condition. Thus, the objective of this study is to discuss the effect of rotation on fluid flow and heat transfer performance of U-shaped channel with ribbed walls under high rotational numbers. Investigated Reynolds number is Re = 12500 and the rotation numbers are Ro b = 0.4 and 0.6. In the results, the spatially heat transfer coefficient distributions are exhibited to discuss the effect of rotation and roughened walls. It is found that ribbed walls enhance the heat transfer rate significantly. Under the rotational condition, the Nu in the first pass with outward flow is increased while that in the second pass is decreased. Finally, average Nu ratio, friction ratio, and thermal performance are all presented to discuss the thermal characteristics.</abstract><cop>New York</cop><pub>Hindawi Publishing Corporation</pub><doi>10.1155/2014/981376</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Channels Computational fluid dynamics Coolants Cooling Finite element analysis Fluid dynamics Fluid flow Gas turbine engines Gas turbines Heat transfer Heat transfer coefficients Mathematical models Mathematical problems Numerical analysis Product introduction Reynolds number Rotating fluids Rotation Rotational Studies Turbine blades Turbulence models Walls |
| title | Numerical Calculations on Flow and Heat Transfer in Smooth and Ribbed Two-Pass Square Channels under Rotational Effects |
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