Large eddy simulation of compound angle effects on cooling effectiveness and flow structure of fan-shaped holes
DC Field | Value | Language |
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dc.contributor.author | Zamiri, Ali | - |
dc.contributor.author | Chung, Jin Taek | - |
dc.date.accessioned | 2022-11-04T11:41:41Z | - |
dc.date.available | 2022-11-04T11:41:41Z | - |
dc.date.created | 2022-11-04 | - |
dc.date.issued | 2021-10 | - |
dc.identifier.issn | 0017-9310 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/144646 | - |
dc.description.abstract | Large eddy simulation (LES) was utilized to investigate the influence of applying various compound angle (CA), on film-cooling effectiveness and turbulent flow structures. The baseline cooling hole was a 7-7-7 laidback fan-shaped hole, where this hole is located at a flat plate surface with a pitchwise spacing of 6D, and the hole was inclined at 30-degrees with respect to the mainstream hot-gas flow. Five different cooling hole orientations (CA0, CA15, CA30, CA45 and CA60) were numerically simulated using a constant density ratio of 1.5 and two blowing ratios (M = 1.0 and 3.0). The time-averaged computational results for the thermal and flow fields were validated by comparison with experimental data from previous literature. The simulation results revealed that under a low blowing ratio (M = 1.0), cooling performance was not affected significantly by the compound angle, but at the higher blowing ratio there was a considerable improvement of 40% for the CA60 hole over the CA0 hole, this improvement was especially pronounced in the lateral direction. The vorticity-field investigation showed that as the compound angle increased, the magnitude of the streamwise vorticity also increased while it becoming more asymmetric. In addition, time-space evaluation and spectral analysis of the velocity fluctuations indicates higher unsteadiness and greater turbulent statistics when using holes with larger compound angles. (c) 2021 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | THERMAL PERFORMANCE | - |
dc.subject | FILM | - |
dc.subject | OPTIMIZATION | - |
dc.subject | GEOMETRY | - |
dc.title | Large eddy simulation of compound angle effects on cooling effectiveness and flow structure of fan-shaped holes | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Chung, Jin Taek | - |
dc.identifier.doi | 10.1016/j.ijheatmasstransfer.2021.121599 | - |
dc.identifier.scopusid | 2-s2.0-85109199756 | - |
dc.identifier.wosid | 000685128300004 | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.178 | - |
dc.relation.isPartOf | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | - |
dc.citation.title | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | - |
dc.citation.volume | 178 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Thermodynamics | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Mechanics | - |
dc.relation.journalWebOfScienceCategory | Thermodynamics | - |
dc.relation.journalWebOfScienceCategory | Engineering, Mechanical | - |
dc.relation.journalWebOfScienceCategory | Mechanics | - |
dc.subject.keywordPlus | THERMAL PERFORMANCE | - |
dc.subject.keywordPlus | FILM | - |
dc.subject.keywordPlus | OPTIMIZATION | - |
dc.subject.keywordPlus | GEOMETRY | - |
dc.subject.keywordAuthor | Gas turbine | - |
dc.subject.keywordAuthor | Laidback fan-shaped hole | - |
dc.subject.keywordAuthor | Large eddy simulation | - |
dc.subject.keywordAuthor | Compound angle | - |
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