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dc.identifier.uri | http://dx.doi.org/10.15488/15733 | |
dc.identifier.uri | https://www.repo.uni-hannover.de/handle/123456789/15857 | |
dc.contributor.author | Oettinger, Marcel | |
dc.contributor.author | Mimic, Dajan | |
dc.contributor.author | Henke, Michael | |
dc.contributor.author | Schmunk, Oleg | |
dc.contributor.author | Seume, Jorg | |
dc.date.accessioned | 2023-12-12T08:31:45Z | |
dc.date.available | 2023-12-12T08:31:45Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Oettinger, M.; Mimic, D.; Henke, M.; Schmunk, O.; Seume, J.R.: Loss assessment of the axial-gap size effect in a low-pressure turbine. In: Journal of the Global Power and Propulsion Society 5 (2021), S. 1-14. DOI: https://doi.org/10.33737/jgpps/127834 | |
dc.description.abstract | The aim of this work is the decomposition, quantification, and analysis of losses related to the axial-gap size effect in a 1.5-stage low-pressure turbine. Both experimental data and unsteady RANS calculations are investigated for axial gaps equal to 20%, 50% and 80% of the stator axial chord. A framework for identifying sources of loss typically encountered in turbomachinery is derived and utilized for the low-pressure turbine presented. The analysis focuses on the dependency between these losses and the axial-gap vari-ation. It is found that two-dimensional profile losses increase for smaller gaps due to higher wake-mixing losses and unsteady wake-blade interaction. Losses in the end-wall regions, however, decrease for smaller gaps. The total system efficiency can be described by a superposition of individual loss con-tributions, the optimum of which is found for the smallest gap investigated. It is concluded that these loss contributions are characteristic for the medium aspect-ratio airfoils and operating conditions investigated. This establishes a deeper physical understanding for future investigations into the axial-gap size effect and its interdependency with other design parameters. | eng |
dc.language.iso | eng | |
dc.publisher | [Zug] : GPPS | |
dc.relation.ispartofseries | Journal of the Global Power and Propulsion Society 5 (2021) | |
dc.rights | CC BY 4.0 Unported | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0 | |
dc.subject | Axial gap | eng |
dc.subject | Axial turbines | eng |
dc.subject | CFD | eng |
dc.subject | Loss breakdown | eng |
dc.subject | Turbine efficiency | eng |
dc.subject.ddc | 620 | Ingenieurwissenschaften und Maschinenbau | |
dc.title | Loss assessment of the axial-gap size effect in a low-pressure turbine | eng |
dc.type | Article | |
dc.type | Text | |
dc.relation.essn | 2515-3080 | |
dc.relation.doi | https://doi.org/10.33737/jgpps/127834 | |
dc.bibliographicCitation.volume | 5 | |
dc.bibliographicCitation.firstPage | 1 | |
dc.bibliographicCitation.lastPage | 14 | |
dc.description.version | publishedVersion | |
tib.accessRights | frei zug�nglich |