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Experimental Investigation on the Time–Space Evolution of a Laminar Separation Bubble by Proper Orthogonal Decomposition and Dynamic Mode Decomposition
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A time-resolved particle image velocimetry (TR-PIV) system has been employed to investigate a laminar separation bubble which is induced by a strong adverse pressure gradient typical of ultrahigh-lift low-pressure turbine ...
Evaluation of Turbulent Spot Production Rate in Boundary Layers Under Variable Pressure Gradients for Gas Turbine Applications
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The paper presents several results from an experimental data base on transitional boundary layers developing on a flat plate installed within a variable area opening endwall channel. Measurements have been carried out by ...
Recognition of Structures Leading to Transition in a Low-Pressure Turbine Cascade: Effect of Reduced Frequency
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The boundary layer developing over the suction side of a low-pressure turbine cascade operating under unsteady inflow conditions has been experimentally investigated. Time-resolved particle image velocimetry (PIV) measurements ...
Effects of Ribbed Surfaces on Profile Losses of Low-Pressure Turbine Blades
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this work, streamwise oriented riblets were installed on a flat plate exposed to an adverse pressure gradient typical of low-pressure turbine (LPT) blade and, successively, on the suction side of an LPT cascade operating ...
Correlations for the Prediction of Intermittency and Turbulent Spot Production Rate in Separated Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Experimental data describing laminar separation bubbles developing under strong adverse pressure gradients, typical of ultra-high-lift turbine blades, have been analyzed to define empirical correlations able to predict the ...
On the Identification and Decomposition of the Unsteady Losses in a Turbine Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present paper describes the application of proper orthogonal decomposition (POD) to large eddy simulation (LES) of the T106A low-pressure-turbine profile with unsteady incoming wakes at two different flow conditions. ...
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