Numerical Investigation of Three-Dimensional Clocking Effects in a Low Pressure Turbine

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TitleNumerical Investigation of Three-Dimensional Clocking Effects in a Low Pressure Turbine
Publication TypeConference Proceedings
Year of Publication2003
AuthorsArnone A, Marconcini M, Scotti Del Greco A, Spano E
Conference NameASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
Volume6: Turbo Expo 2003, Parts A and B
Pagination245-254
Date Published06/2003
PublisherASME
Conference LocationAtlanta, Georgia, USA
ISBN Number0-7918-3689-4
Other NumbersScopus 2-s2.0-0348224994
AbstractOne and a half stages of a low pressure turbine were investigated using a three-dimensional, time-accurate, viscous solver. Unsteady analyses were carried out by varying the circumferential relative position of consecutive vanes to study the effects of clocking on performance. Assuming that efficiency improvements by clocking are linked to the wake tangential position with respect to the successive blade, a certain circumferential shift in this position can be observed along the blade height due to blade twist and non-radial stacking, giving different contributions. In order to assess this phenomenon, results from three-dimensional computations were compared with a quasi three-dimensional analysis at mid-span. The effects of clocking on wake interaction mechanisms and unsteady blade loadings are presented and discussed.
URLhttp://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1578135&resultClick=1
DOI10.1115/GT2003-38414
Refereed DesignationRefereed