Session3_Walthe présentation enjeu et techno

042006 9 reduction of noise emissions from lp

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Unformatted text preview: om LP-Turbines Close Collaboration with DLR and University of Stuttgart Propagation sound wave Calculated sound pressure generation Calculated sound pressure generation and suppression within a turbine stator and suppression within a turbine stator Experimental & analytical investigations of noise Experimental & analytical investigations of noise generation mechanisms result in most efficient generation mechanisms result in most efficient reduction measures at point of origin: reduction measures at point of origin: Optimized annulus & blading designs are expected Optimized annulus & blading designs are expected to achieve 50% of total noise reduction target to achieve 50% of total noise reduction target TETM - 10.04.2006 10 High Speed Low-Pressure Turbine Technology High Speed LPT 'Clean' High Speed LPT 'Clean' Single crystal for lightweight Single crystal for lightweight high temperature bladings high temperature bladings TETM - 10.04.2006 High Lift Blading High Lift Blading Efficient cooling systems Efficient cooling systems 11 High Speed Turbine Technology: Baseline for Geared Turbofans High speed, high temperature, transonic High speed, high temperature, transonic LPT with new aerodynamic design LPT with new aerodynamic design New blade material New blade material Cooled vane1 & blade1 Cooled vane1 & blade1 Geared Turbofan Engine Geared Turbofan Engine demonstration by use of the demonstration by use of the PW 6000 core scheduled for 2008 PW 6...
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