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 |
|