Importance of the vane exit Mach number on the axial clearance-related losses

Show simple item record

dc.identifier.uri http://dx.doi.org/10.15488/3013
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/3043
dc.contributor.author Grönman, Aki
dc.contributor.author Biester, Marc H.-O.
dc.contributor.author Turunen-Saaresti, Teemu
dc.contributor.author Jaatinen-Värri, Ahti
dc.contributor.author Backman, Jari
dc.contributor.author Seume, Jörg R.
dc.date.accessioned 2018-03-01T08:47:23Z
dc.date.available 2018-03-01T08:47:23Z
dc.date.issued 2016
dc.identifier.citation Grönman, A.; Biester, M.H.-O.; Turunen-Saaresti, T.; Jaatinen-Värri, A.; Backman, J. et al.: Importance of the vane exit Mach number on the axial clearance-related losses. In: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 230 (2016), Nr. 2, S. 175-183. DOI: https://doi.org/10.1177/0957650915623087
dc.description.abstract More efficient and physically smaller axial turbine designs are promoted to lower emissions and increase revenue. The physical size and the weight of the axial turbine can be minimised by adjusting the distance between successive stator and rotor rows. The influence of changing stator-rotor axial clearance can usually have either a positive or a negative influence on the turbine performance, and the reasons for this varying behaviour are not currently fully understood. A previous study revealed several design parameters that correlate with the efficiency curve shape. However, the effects of two parameters, namely the stator outlet Mach number and the reduced blade passing frequency, still remained unclear. Therefore, a novel approach is taken to analyse the correlations between the two design parameters and the axial clearance efficiency curve shape. Several different turbines are analysed using data available in the literature, and also new data are presented. The study suggests that the stator outlet Mach number correlates reasonably well with the efficiency curve shape, and it was further linked to five loss mechanisms and the rotational speed. Although the unsteady interaction plays an important role in the loss share, the level of unsteadiness did not correlate with the efficiency curve shape. © 2015 Institution of Mechanical Engineers. eng
dc.language.iso eng
dc.publisher London : SAGE Publications Ltd.
dc.relation.ispartofseries Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 230 (2016), Nr. 2
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject axial clearance eng
dc.subject axial gap eng
dc.subject Axial turbine eng
dc.subject turbine efficiency eng
dc.subject Aerodynamics eng
dc.subject Axial flow turbomachinery eng
dc.subject Efficiency eng
dc.subject Mach number eng
dc.subject Stators eng
dc.subject Turbines eng
dc.subject Axial clearance eng
dc.subject Axial gap eng
dc.subject Axial turbine eng
dc.subject Blade passing frequency eng
dc.subject Efficiency curves eng
dc.subject Turbine efficiency eng
dc.subject Turbine performance eng
dc.subject Unsteady interaction eng
dc.subject Turbine components eng
dc.subject.ddc 621 | Angewandte Physik ger
dc.title Importance of the vane exit Mach number on the axial clearance-related losses
dc.type article
dc.type Text
dc.relation.issn 0957-6509
dc.relation.doi https://doi.org/10.1177/0957650915623087
dc.bibliographicCitation.issue 2
dc.bibliographicCitation.volume 230
dc.bibliographicCitation.firstPage 175
dc.bibliographicCitation.lastPage 183
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


Files in this item

This item appears in the following Collection(s):

Show simple item record

 

Search the repository


Browse

My Account

Usage Statistics