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RISScaling Three Dimensional Low Pressure Turbine Blades for Low Speed Testing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present activity was carried out in the framework of the Clean Sky European Research Project ITURB (optimal highlift turbine blade aeromechanical design), aimed at designing and validating a turbine blade for a geared ...
Predicting High Lift Low Pressure Turbine Cascades Flow Using Transition Sensitive Turbulence Closures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper discusses the application of different transitionsensitive turbulence closures to the prediction of lowReynoldsnumber flows in highlift cascades operating in lowpressure turbine (LPT) conditions. Different ...
Accounting for Unsteady Interaction in Transonic Stages
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper discusses the importance of the unsteady interaction in transonic turbomachinery stages. Although the flow in a turbomachine is inherently unsteady, most current calculations for routine design work exploit the ...
Improving Steady Computational Fluid Dynamics to Capture the Effects of Radial Mixing in Axial Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The compressors of power-generation gas turbines (GTs) have a high stage count, blades with low aspect ratios, and large clearances. These features promote strong secondary flows. An important outcome deriving from the ...
Innovative Cavity Modeling for Centrifugal Compressors Aeromechanical Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Centrifugal compressor aeromechanics is playing an increasingly important role in the energy transition scenario, especially when operating with low-molecular-weight gases, such as hydrogen. For these machines, maximum ...
Impact of Turbine Center Frame Wakes on Downstream Rows in Heavy-Duty Low-Pressure Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this work, the effects of turbine center frame (TCF) wakes on the aeromechanical behavior of the downstream low-pressure turbine (LPT) blades are numerically investigated and compared with the experimental data. A small ...
Targeting Full-Hydrogen Operation on Industrial-Scale Gas Turbines: Impact of Unconventional Fuels on Turbine Module Performance and Aeromechanics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: With the trend to full decarbonization, a full-hydrogen economy development is a key industrial objective. Gas turbines, currently one of the cleanest fossil fuel-based power generation solutions, provide reliable and ...
Improvements in the Prediction of Steady and Unsteady Transition and Mixing in Low-Pressure Turbines by Means of Machine-Learnt Closures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this article, novel machine-learnt transition and turbulence models are applied to the prediction of boundary-layer transition and wake mixing in a low-pressure turbine (LPT) cascade, including unsteady inflow cases ...
The Influence of Roughness on a High Pressure Steam Turbine Stage: An Experimental and Numerical Study
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This work deals with the influence of roughness on highpressure steam turbine stages. It is divided in three parts. In the first one, an experimental campaign on a linear cascade is described, in which blade losses are ...
Special Challenges in the Computational Fluid Dynamics Modeling of Transonic Turbo Expanders
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High pressure ratio turboexpanders often put a strain on computational fluid dynamics (CFD) modeling. First of all, the working fluid is usually characterized by significant departures from the ideal behavior, thus requiring ...