Analysis of flow characteristics and cooling performance of a novel impingement/effusion structure with bypass hollow holes
As a promising cooling technique, the double-wall cooling structure has been integrated into the design of advanced aeroengine high-temperature components. However, its widespread application in configurations with low pressure ratios between secondary flow and the main flow is hindered due to signi...
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Veröffentlicht in: | Physics of fluids (1994) 2023-10, Vol.35 (10) |
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creator | Xu, Zhi-peng Zhu, Hui-ren Liu, Cun-liang Li, Xin-lei |
description | As a promising cooling technique, the double-wall cooling structure has been integrated into the design of advanced aeroengine high-temperature components. However, its widespread application in configurations with low pressure ratios between secondary flow and the main flow is hindered due to significant internal flow resistance. To address this issue, a novel low-resistance hollow pillar double-wall structure (NHDW) is developed. This study conducts conjugated heat transfer numerical simulations of NHDW and the traditional solid pillar double-wall structure (TSDW) for comparative analysis. Flow characteristics are examined to understand the sources of internal flow resistance and the coupling mechanism between internal and external heat transfer. The results demonstrate that the NHDW exhibits substantially lower flow resistance than the TSDW, with the total pressure loss dropping to approximately 1/3 of the corresponding TSDW under hole inclination angles of 30°, 60°, and 90°. The reduced internal flow resistance of the NHDW is attributed to the parallel bypass flow within the hollow pillar. Moreover, the overall cooling effectiveness (ϕ) of NHDW is enhanced by 9.2%–16.9% for different inclination angles at a blowing ratio of M = 1.0. Additionally, the interaction vortex structure on the mainstream side surface of the NHDW significantly improves the external cooling effectiveness, contributing to the overall enhancement of the cooling performance. Furthermore, a one-dimensional thermal resistance analysis method is introduced to distinguish the contributions of internal cooling and external film cooling. This analysis highlights the importance of external cooling enhancements in the novel structure. |
doi_str_mv | 10.1063/5.0172534 |
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However, its widespread application in configurations with low pressure ratios between secondary flow and the main flow is hindered due to significant internal flow resistance. To address this issue, a novel low-resistance hollow pillar double-wall structure (NHDW) is developed. This study conducts conjugated heat transfer numerical simulations of NHDW and the traditional solid pillar double-wall structure (TSDW) for comparative analysis. Flow characteristics are examined to understand the sources of internal flow resistance and the coupling mechanism between internal and external heat transfer. The results demonstrate that the NHDW exhibits substantially lower flow resistance than the TSDW, with the total pressure loss dropping to approximately 1/3 of the corresponding TSDW under hole inclination angles of 30°, 60°, and 90°. The reduced internal flow resistance of the NHDW is attributed to the parallel bypass flow within the hollow pillar. Moreover, the overall cooling effectiveness (ϕ) of NHDW is enhanced by 9.2%–16.9% for different inclination angles at a blowing ratio of M = 1.0. Additionally, the interaction vortex structure on the mainstream side surface of the NHDW significantly improves the external cooling effectiveness, contributing to the overall enhancement of the cooling performance. Furthermore, a one-dimensional thermal resistance analysis method is introduced to distinguish the contributions of internal cooling and external film cooling. This analysis highlights the importance of external cooling enhancements in the novel structure.</description><identifier>ISSN: 1070-6631</identifier><identifier>EISSN: 1089-7666</identifier><identifier>DOI: 10.1063/5.0172534</identifier><identifier>CODEN: PHFLE6</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Cooling ; Dimensional analysis ; Effectiveness ; Film cooling ; Flow characteristics ; Flow resistance ; Fluid dynamics ; Heat transfer ; High temperature ; Inclination angle ; Internal flow ; Low pressure ; Physics ; Pressure loss ; Secondary flow ; Thermal resistance</subject><ispartof>Physics of fluids (1994), 2023-10, Vol.35 (10)</ispartof><rights>Author(s)</rights><rights>2023 Author(s). Published under an exclusive license by AIP Publishing.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c292t-cbd43206616ad276462a27e58be2e73d397c9d08f877b73f6e34e3cf4d552c813</citedby><cites>FETCH-LOGICAL-c292t-cbd43206616ad276462a27e58be2e73d397c9d08f877b73f6e34e3cf4d552c813</cites><orcidid>0009-0008-7647-4102 ; 0000-0001-7516-0234 ; 0000-0003-3713-913X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,794,4512,27924,27925</link.rule.ids></links><search><creatorcontrib>Xu, Zhi-peng</creatorcontrib><creatorcontrib>Zhu, Hui-ren</creatorcontrib><creatorcontrib>Liu, Cun-liang</creatorcontrib><creatorcontrib>Li, Xin-lei</creatorcontrib><title>Analysis of flow characteristics and cooling performance of a novel impingement/effusion structure with bypass hollow holes</title><title>Physics of fluids (1994)</title><description>As a promising cooling technique, the double-wall cooling structure has been integrated into the design of advanced aeroengine high-temperature components. However, its widespread application in configurations with low pressure ratios between secondary flow and the main flow is hindered due to significant internal flow resistance. To address this issue, a novel low-resistance hollow pillar double-wall structure (NHDW) is developed. This study conducts conjugated heat transfer numerical simulations of NHDW and the traditional solid pillar double-wall structure (TSDW) for comparative analysis. Flow characteristics are examined to understand the sources of internal flow resistance and the coupling mechanism between internal and external heat transfer. The results demonstrate that the NHDW exhibits substantially lower flow resistance than the TSDW, with the total pressure loss dropping to approximately 1/3 of the corresponding TSDW under hole inclination angles of 30°, 60°, and 90°. The reduced internal flow resistance of the NHDW is attributed to the parallel bypass flow within the hollow pillar. Moreover, the overall cooling effectiveness (ϕ) of NHDW is enhanced by 9.2%–16.9% for different inclination angles at a blowing ratio of M = 1.0. Additionally, the interaction vortex structure on the mainstream side surface of the NHDW significantly improves the external cooling effectiveness, contributing to the overall enhancement of the cooling performance. Furthermore, a one-dimensional thermal resistance analysis method is introduced to distinguish the contributions of internal cooling and external film cooling. This analysis highlights the importance of external cooling enhancements in the novel structure.</description><subject>Cooling</subject><subject>Dimensional analysis</subject><subject>Effectiveness</subject><subject>Film cooling</subject><subject>Flow characteristics</subject><subject>Flow resistance</subject><subject>Fluid dynamics</subject><subject>Heat transfer</subject><subject>High temperature</subject><subject>Inclination angle</subject><subject>Internal flow</subject><subject>Low pressure</subject><subject>Physics</subject><subject>Pressure loss</subject><subject>Secondary flow</subject><subject>Thermal resistance</subject><issn>1070-6631</issn><issn>1089-7666</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLw0AUhYMoWKsL_8GAK4W080hmkmUpvqDgRtdhMrljp6SZOHeiFP-8Ce3a1blwPu7hnCS5ZXTBqBTLfEGZ4rnIzpIZo0WZKinl-XQrmkop2GVyhbijlIqSy1nyu-p0e0CHxFtiW_9DzFYHbSIEh9EZJLpriPG-dd0n6SFYH_a6MzDxmnT-G1ri9v3owh66uARrB3S-IxjDYOIQgPy4uCX1odeIZOvbKWQUwOvkwuoW4eak8-Tj6fF9_ZJu3p5f16tNanjJY2rqJhOcSsmkbriSmeSaK8iLGjgo0YhSmbKhhS2UqpWwEkQGwtisyXNuCibmyd3xbx_81wAYq50fwtgbK14UnKqiVBN1f6RM8IgBbNUHt9fhUDFaTdtWeXXadmQfjiwaF3Uc6_4D_wEgGnsP</recordid><startdate>202310</startdate><enddate>202310</enddate><creator>Xu, Zhi-peng</creator><creator>Zhu, Hui-ren</creator><creator>Liu, Cun-liang</creator><creator>Li, Xin-lei</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0009-0008-7647-4102</orcidid><orcidid>https://orcid.org/0000-0001-7516-0234</orcidid><orcidid>https://orcid.org/0000-0003-3713-913X</orcidid></search><sort><creationdate>202310</creationdate><title>Analysis of flow characteristics and cooling performance of a novel impingement/effusion structure with bypass hollow holes</title><author>Xu, Zhi-peng ; Zhu, Hui-ren ; Liu, Cun-liang ; Li, Xin-lei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c292t-cbd43206616ad276462a27e58be2e73d397c9d08f877b73f6e34e3cf4d552c813</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Cooling</topic><topic>Dimensional analysis</topic><topic>Effectiveness</topic><topic>Film cooling</topic><topic>Flow characteristics</topic><topic>Flow resistance</topic><topic>Fluid dynamics</topic><topic>Heat transfer</topic><topic>High temperature</topic><topic>Inclination angle</topic><topic>Internal flow</topic><topic>Low pressure</topic><topic>Physics</topic><topic>Pressure loss</topic><topic>Secondary flow</topic><topic>Thermal resistance</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Xu, Zhi-peng</creatorcontrib><creatorcontrib>Zhu, Hui-ren</creatorcontrib><creatorcontrib>Liu, Cun-liang</creatorcontrib><creatorcontrib>Li, Xin-lei</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physics of fluids (1994)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Xu, Zhi-peng</au><au>Zhu, Hui-ren</au><au>Liu, Cun-liang</au><au>Li, Xin-lei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Analysis of flow characteristics and cooling performance of a novel impingement/effusion structure with bypass hollow holes</atitle><jtitle>Physics of fluids (1994)</jtitle><date>2023-10</date><risdate>2023</risdate><volume>35</volume><issue>10</issue><issn>1070-6631</issn><eissn>1089-7666</eissn><coden>PHFLE6</coden><abstract>As a promising cooling technique, the double-wall cooling structure has been integrated into the design of advanced aeroengine high-temperature components. However, its widespread application in configurations with low pressure ratios between secondary flow and the main flow is hindered due to significant internal flow resistance. To address this issue, a novel low-resistance hollow pillar double-wall structure (NHDW) is developed. This study conducts conjugated heat transfer numerical simulations of NHDW and the traditional solid pillar double-wall structure (TSDW) for comparative analysis. Flow characteristics are examined to understand the sources of internal flow resistance and the coupling mechanism between internal and external heat transfer. The results demonstrate that the NHDW exhibits substantially lower flow resistance than the TSDW, with the total pressure loss dropping to approximately 1/3 of the corresponding TSDW under hole inclination angles of 30°, 60°, and 90°. The reduced internal flow resistance of the NHDW is attributed to the parallel bypass flow within the hollow pillar. Moreover, the overall cooling effectiveness (ϕ) of NHDW is enhanced by 9.2%–16.9% for different inclination angles at a blowing ratio of M = 1.0. Additionally, the interaction vortex structure on the mainstream side surface of the NHDW significantly improves the external cooling effectiveness, contributing to the overall enhancement of the cooling performance. Furthermore, a one-dimensional thermal resistance analysis method is introduced to distinguish the contributions of internal cooling and external film cooling. This analysis highlights the importance of external cooling enhancements in the novel structure.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/5.0172534</doi><tpages>15</tpages><orcidid>https://orcid.org/0009-0008-7647-4102</orcidid><orcidid>https://orcid.org/0000-0001-7516-0234</orcidid><orcidid>https://orcid.org/0000-0003-3713-913X</orcidid></addata></record> |
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source | AIP Journals Complete; Alma/SFX Local Collection |
subjects | Cooling Dimensional analysis Effectiveness Film cooling Flow characteristics Flow resistance Fluid dynamics Heat transfer High temperature Inclination angle Internal flow Low pressure Physics Pressure loss Secondary flow Thermal resistance |
title | Analysis of flow characteristics and cooling performance of a novel impingement/effusion structure with bypass hollow holes |
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