Film-Cooling Performance of Multiple Arrays of Cylindrical and Fan-Shaped Holes
Experimental investigations are performed on the suction side of a cooled turbine guide vane. Transient infrared thermography is used to evaluate film-cooling performance of cylindrical and fan-shaped holes in a test facility representing engine conditions. Adiabatic film effectiveness and net heat...
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Veröffentlicht in: | Journal of propulsion and power 2015-11, Vol.31 (6), p.1621-1630 |
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creator | Nadali Najafabadi, Hossein Karlsson, Matts Utriainen, Esa Kinell, Mats Wang, Lieke |
description | Experimental investigations are performed on the suction side of a cooled turbine guide vane. Transient infrared thermography is used to evaluate film-cooling performance of cylindrical and fan-shaped holes in a test facility representing engine conditions. Adiabatic film effectiveness and net heat flux reduction results due to coolant injection through double and multiple rows in the presence and absence of an upstream showerhead are presented. Two double staggered rows at different positions have been cross compared: one at a relatively high convex curvature region and the other close to the maximum throat velocity. A combination of the two double rows is considered to be multiple rows. The tested blowing ratios are in the interval of [0.6–1.2] and [0.3–1.2] for double and multiple rows, respectively. The showerhead cooling is maintained at a nominal blowing ratio. The findings suggest that the choice of best cooling hole shape for film-cooling design can be highly influenced by the number of cooling rows to be used and also the presence (or absence) of showerhead cooling. It is worth noting that the outcome may differ depending on the quantity of interest (i.e., adiabatic film effectiveness or net heat flux reduction). |
doi_str_mv | 10.2514/1.B35618 |
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Transient infrared thermography is used to evaluate film-cooling performance of cylindrical and fan-shaped holes in a test facility representing engine conditions. Adiabatic film effectiveness and net heat flux reduction results due to coolant injection through double and multiple rows in the presence and absence of an upstream showerhead are presented. Two double staggered rows at different positions have been cross compared: one at a relatively high convex curvature region and the other close to the maximum throat velocity. A combination of the two double rows is considered to be multiple rows. The tested blowing ratios are in the interval of [0.6–1.2] and [0.3–1.2] for double and multiple rows, respectively. The showerhead cooling is maintained at a nominal blowing ratio. The findings suggest that the choice of best cooling hole shape for film-cooling design can be highly influenced by the number of cooling rows to be used and also the presence (or absence) of showerhead cooling. It is worth noting that the outcome may differ depending on the quantity of interest (i.e., adiabatic film effectiveness or net heat flux reduction).</description><identifier>ISSN: 0748-4658</identifier><identifier>ISSN: 1533-3876</identifier><identifier>EISSN: 1533-3876</identifier><identifier>DOI: 10.2514/1.B35618</identifier><identifier>CODEN: JPPOEL</identifier><language>eng</language><publisher>Reston: American Institute of Aeronautics and Astronautics</publisher><subject>Adiabatic flow ; Arrays ; Blowing ; Cooling ; Cylindrical Holes ; Fan-shaped Holes ; Film Cooling ; Film Effectiveness ; Gas Turbine ; Heat flux ; Heat transfer ; Infrared imaging ; Net Heat Flux Reduction ; Performance evaluation ; Reduction ; Showers ; Suction ; Test facilities ; Thermography ; Turbines</subject><ispartof>Journal of propulsion and power, 2015-11, Vol.31 (6), p.1621-1630</ispartof><rights>Copyright © 2015 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. Copies of this paper may be made for personal or internal use, on condition that the copier pay the $10.00 per-copy fee to the Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923; include the code and $10.00 in correspondence with the CCC.</rights><rights>Copyright © 2015 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. Copies of this paper may be made for personal or internal use, on condition that the copier pay the $10.00 per-copy fee to the Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923; include the code 1533-3876/15 and $10.00 in correspondence with the CCC.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a423t-f00d8e54bba660360ed36891d8b2c2c2035cbfbe881ca3e5512c60f3b8c95dad3</citedby><cites>FETCH-LOGICAL-a423t-f00d8e54bba660360ed36891d8b2c2c2035cbfbe881ca3e5512c60f3b8c95dad3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-117030$$DView record from Swedish Publication Index$$Hfree_for_read</backlink></links><search><creatorcontrib>Nadali Najafabadi, Hossein</creatorcontrib><creatorcontrib>Karlsson, Matts</creatorcontrib><creatorcontrib>Utriainen, Esa</creatorcontrib><creatorcontrib>Kinell, Mats</creatorcontrib><creatorcontrib>Wang, Lieke</creatorcontrib><title>Film-Cooling Performance of Multiple Arrays of Cylindrical and Fan-Shaped Holes</title><title>Journal of propulsion and power</title><description>Experimental investigations are performed on the suction side of a cooled turbine guide vane. Transient infrared thermography is used to evaluate film-cooling performance of cylindrical and fan-shaped holes in a test facility representing engine conditions. Adiabatic film effectiveness and net heat flux reduction results due to coolant injection through double and multiple rows in the presence and absence of an upstream showerhead are presented. Two double staggered rows at different positions have been cross compared: one at a relatively high convex curvature region and the other close to the maximum throat velocity. A combination of the two double rows is considered to be multiple rows. The tested blowing ratios are in the interval of [0.6–1.2] and [0.3–1.2] for double and multiple rows, respectively. The showerhead cooling is maintained at a nominal blowing ratio. The findings suggest that the choice of best cooling hole shape for film-cooling design can be highly influenced by the number of cooling rows to be used and also the presence (or absence) of showerhead cooling. It is worth noting that the outcome may differ depending on the quantity of interest (i.e., adiabatic film effectiveness or net heat flux reduction).</description><subject>Adiabatic flow</subject><subject>Arrays</subject><subject>Blowing</subject><subject>Cooling</subject><subject>Cylindrical Holes</subject><subject>Fan-shaped Holes</subject><subject>Film Cooling</subject><subject>Film Effectiveness</subject><subject>Gas Turbine</subject><subject>Heat flux</subject><subject>Heat transfer</subject><subject>Infrared imaging</subject><subject>Net Heat Flux Reduction</subject><subject>Performance evaluation</subject><subject>Reduction</subject><subject>Showers</subject><subject>Suction</subject><subject>Test facilities</subject><subject>Thermography</subject><subject>Turbines</subject><issn>0748-4658</issn><issn>1533-3876</issn><issn>1533-3876</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp90d1r2zAQAHAxVliWDfYnGEahL251liXLj2naNIWOFvbxKs6y3CkolivFlPz3VXDZSh7KPRwcP-6DI-Qb0POCQ3kB55eMC5AfyAw4YzmTlfhIZrQqZV4KLj-RzzFuKAUhRTUj9yvrtvnSe2f7x-zBhM6HLfbaZL7LfoxuZwdnskUIuI-H0nKfYBusRpdh32Yr7POff3Ewbbb2zsQv5KRDF83X1zwnv1fXv5br_O7-5na5uMuxLNgu7yhtpeFl06AQlAlqWiZkDa1sCp2CMq6brjFSgkZmOIdCC9qxRuqat9iyOcmnvvHZDGOjhmC3GPbKo1VX9s9C-fConB0VQEUZTf5s8kPwT6OJO7W1URvnsDd-jAqqxKoaapno9yO68WPo0zWqKOu0KwVZvaegKhIoJWP_x-rgYwym-7coUHX4lwI1_SvR04miRXzT7Ni9AL9tkJk</recordid><startdate>20151101</startdate><enddate>20151101</enddate><creator>Nadali Najafabadi, Hossein</creator><creator>Karlsson, Matts</creator><creator>Utriainen, Esa</creator><creator>Kinell, Mats</creator><creator>Wang, Lieke</creator><general>American Institute of Aeronautics and Astronautics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope><scope>ADTPV</scope><scope>AOWAS</scope><scope>DG8</scope></search><sort><creationdate>20151101</creationdate><title>Film-Cooling Performance of Multiple Arrays of Cylindrical and Fan-Shaped Holes</title><author>Nadali Najafabadi, Hossein ; Karlsson, Matts ; Utriainen, Esa ; Kinell, Mats ; Wang, Lieke</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a423t-f00d8e54bba660360ed36891d8b2c2c2035cbfbe881ca3e5512c60f3b8c95dad3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Adiabatic flow</topic><topic>Arrays</topic><topic>Blowing</topic><topic>Cooling</topic><topic>Cylindrical Holes</topic><topic>Fan-shaped Holes</topic><topic>Film Cooling</topic><topic>Film Effectiveness</topic><topic>Gas Turbine</topic><topic>Heat flux</topic><topic>Heat transfer</topic><topic>Infrared imaging</topic><topic>Net Heat Flux Reduction</topic><topic>Performance evaluation</topic><topic>Reduction</topic><topic>Showers</topic><topic>Suction</topic><topic>Test facilities</topic><topic>Thermography</topic><topic>Turbines</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nadali Najafabadi, Hossein</creatorcontrib><creatorcontrib>Karlsson, Matts</creatorcontrib><creatorcontrib>Utriainen, Esa</creatorcontrib><creatorcontrib>Kinell, Mats</creatorcontrib><creatorcontrib>Wang, Lieke</creatorcontrib><collection>CrossRef</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><collection>SwePub</collection><collection>SwePub Articles</collection><collection>SWEPUB Linköpings universitet</collection><jtitle>Journal of propulsion and power</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nadali Najafabadi, Hossein</au><au>Karlsson, Matts</au><au>Utriainen, Esa</au><au>Kinell, Mats</au><au>Wang, Lieke</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Film-Cooling Performance of Multiple Arrays of Cylindrical and Fan-Shaped Holes</atitle><jtitle>Journal of propulsion and power</jtitle><date>2015-11-01</date><risdate>2015</risdate><volume>31</volume><issue>6</issue><spage>1621</spage><epage>1630</epage><pages>1621-1630</pages><issn>0748-4658</issn><issn>1533-3876</issn><eissn>1533-3876</eissn><coden>JPPOEL</coden><abstract>Experimental investigations are performed on the suction side of a cooled turbine guide vane. Transient infrared thermography is used to evaluate film-cooling performance of cylindrical and fan-shaped holes in a test facility representing engine conditions. Adiabatic film effectiveness and net heat flux reduction results due to coolant injection through double and multiple rows in the presence and absence of an upstream showerhead are presented. Two double staggered rows at different positions have been cross compared: one at a relatively high convex curvature region and the other close to the maximum throat velocity. A combination of the two double rows is considered to be multiple rows. The tested blowing ratios are in the interval of [0.6–1.2] and [0.3–1.2] for double and multiple rows, respectively. The showerhead cooling is maintained at a nominal blowing ratio. The findings suggest that the choice of best cooling hole shape for film-cooling design can be highly influenced by the number of cooling rows to be used and also the presence (or absence) of showerhead cooling. It is worth noting that the outcome may differ depending on the quantity of interest (i.e., adiabatic film effectiveness or net heat flux reduction).</abstract><cop>Reston</cop><pub>American Institute of Aeronautics and Astronautics</pub><doi>10.2514/1.B35618</doi><tpages>10</tpages></addata></record> |
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subjects | Adiabatic flow Arrays Blowing Cooling Cylindrical Holes Fan-shaped Holes Film Cooling Film Effectiveness Gas Turbine Heat flux Heat transfer Infrared imaging Net Heat Flux Reduction Performance evaluation Reduction Showers Suction Test facilities Thermography Turbines |
title | Film-Cooling Performance of Multiple Arrays of Cylindrical and Fan-Shaped Holes |
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