Parametric Optimization of a High-Lift Turbine Vane

TitleParametric Optimization of a High-Lift Turbine Vane
Publication TypeConference Proceedings
Year of Publication2004
AuthorsArnone A, Bonaiuti D, Focacci A, Pacciani R, Scotti Del Greco A, Spano E
Conference NameConf. Proc. Vol. 5: Turbo Expo 2004, Parts A and B
ISBN Number0-7918-4170-7
Other NumbersScopus 2-s2.0-10244242591
KeywordsHigh Lift, LPT, Optimization

Numerical optimization techniques are increasingly used in the aerodynamic design of turbomachine blades. In the present paper, an existing three-dimensional high-lift turbine cascade was redesigned by means of CFD analyses and optimization techniques, based on the blade geometrical parameterization. A new parametric design tool was developed for this purpose. Blade geometry was handled in a fully three dimensional way, using Bézier curves and surfaces for both camber-surface and thickness distribution. In the optimization procedure different techniques were adopted: a Genetic Algorithm (GA) strategy made it possible to considerably reduce two-dimensional profile losses, while the optimal stacking line was found based on a successive Design of Experiments (DOE) analysis. As a result, a new high-lift blade with higher performance was obtained; in addition, the effect of hub/tip leaning was presented and discussed.


June 14–17, Vienna, Austria, ASME paper GT2004-54308