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Proceedings Papers

Sealing Flow Rate Effects on Unsteady Loss Production in a Low Pressure Turbine Stage

Dario Barsi, Daniele Biassoni, Davide Lengani, Daniele Simoni, Marina Ubaldi
Proc. ASME. GT2024, Volume 12B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing, V12BT30A042, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128711
https://doi.org/10.1115/GT2024-128711
View Paper titled, Sealing Flow Rate Effects on Unsteady Loss Production in a Low Pressure Turbine Stage
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Topics: Cavities, Flow (Dynamics), Pressure, Sealing (Process), Turbines
Proceedings Papers

Analysis of Unsteady Loss Sensitivity to Incidence Angle Variation in Low Pressure Turbine

Matteo Dellacasagrande, Davide Lengani, Daniele Simoni, Marina Ubaldi, Angelo Alberto Granata, Matteo Giovannini, Filippo Rubechini, Francesco Bertini
Proc. ASME. GT2023, Volume 13B: Turbomachinery — Axial Flow Turbine Aerodynamics, V13BT30A037, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103770
https://doi.org/10.1115/GT2023-103770
View Paper titled, Analysis of Unsteady Loss Sensitivity to Incidence Angle Variation in Low Pressure Turbine
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Topics: Pressure, Turbines, Wakes, Flow (Dynamics), Unsteady flow, Blades, Boundary layers, Cascades (Fluid dynamics), Inflow, Engineering design processes
Proceedings Papers

Aerodynamic Loading Distribution Effects on Off-Design Performance of Highly Loaded LP Turbine Cascades Under Steady and Unsteady Incoming Flows

Marco Berrino, Daniele Simoni, Marina Ubaldi, Pietro Zunino, Francesco Bertini
Proc. ASME. GT2016, Volume 2B: Turbomachinery, V02BT38A048, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-57580
https://doi.org/10.1115/GT2016-57580
View Paper titled, Aerodynamic Loading Distribution Effects on Off-Design Performance of Highly Loaded LP Turbine Cascades Under Steady and Unsteady Incoming Flows
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Topics: Design, Flow (Dynamics), Turbines, Reynolds number, Boundary layers, Cascades (Fluid dynamics), Inflow, Robustness, Blades, Physics
Proceedings Papers

Analysis of a LPT Rotor Blade for a Geared Engine: Part II — Characterization of the Time-Varying Flow Field in a Single Stage Research Turbine

Daniele Infantino, Francesca Satta, Daniele Simoni, Marina Ubaldi, Pietro Zunino, Francesco Bertini
Proc. ASME. GT2016, Volume 2B: Turbomachinery, V02BT38A051, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-57725
https://doi.org/10.1115/GT2016-57725
View Paper titled, Analysis of a LPT Rotor Blade for a Geared Engine: Part II — Characterization of the Time-Varying Flow Field in a Single Stage Research Turbine
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Topics: Blades, Engines, Flow (Dynamics), Rotors, Turbines, Stators, Wakes, Vortices, Arches, Design
Journal Articles

A Simplified Model Predicting the Kelvin–Helmholtz Instability Frequency for Laminar Separated Flows

Daniele Simoni, Marina Ubaldi, Pietro Zunino
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Briefs
J. Turbomach. April 2016, 138(4): 044501.
Paper No: TURBO-15-1014
https://doi.org/10.1115/1.4032162
Published Online: December 29, 2015
View Article titled, A Simplified Model Predicting the Kelvin–Helmholtz Instability Frequency for Laminar Separated Flows
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Topics: Boundary layers, Flow (Dynamics), Pressure gradient, Reynolds number, Separation (Technology), Shear (Mechanics), Stability, Waves, Airfoils, Blades
Proceedings Papers

Phase-Locked Investigation of Secondary Flows Perturbed by Passing Wakes in a High-Lift LPT Turbine Cascade

Daniele Infantino, Francesca Satta, Daniele Simoni, Marina Ubaldi, Pietro Zunino, Francesco Bertini
Proc. ASME. GT2015, Volume 2C: Turbomachinery, V02CT44A008, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42480
https://doi.org/10.1115/GT2015-42480
View Paper titled, Phase-Locked Investigation of Secondary Flows Perturbed by Passing Wakes in a High-Lift LPT Turbine Cascade
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Topics: Cascades (Fluid dynamics), Flow (Dynamics), Turbines, Wakes, Turbulence, Vortices, Aerodynamics, Blades, Displacement, Pressure
Journal Articles

Off-Design Performance of a Highly Loaded Low Pressure Turbine Cascade Under Steady and Unsteady Incoming Flow Conditions

Daniele Simoni, Marco Berrino, Marina Ubaldi, Pietro Zunino, Francesco Bertini
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. July 2015, 137(7): 071009.
Paper No: TURBO-14-1280
https://doi.org/10.1115/1.4029200
Published Online: July 1, 2015
View Article titled, Off-Design Performance of a Highly Loaded Low Pressure Turbine Cascade Under Steady and Unsteady Incoming Flow Conditions
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Topics: Blades, Boundary layers, Cascades (Fluid dynamics), Design, Flow (Dynamics), Inflow, Pressure, Suction, Wakes, Turbulence
Proceedings Papers

Measurements of Secondary Flows and Turbulence in a Turbine Cascade Passage

Pietro Zunino, Marina Ubaldi, Antonio Satta
Proc. ASME. GT1987, Volume 1: Turbomachinery, V001T01A036, May 31–June 4, 1987
Publisher: American Society of Mechanical Engineers
Paper No: 87-GT-132
https://doi.org/10.1115/87-GT-132
View Paper titled, Measurements of Secondary Flows and Turbulence in a Turbine Cascade Passage
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Topics: Cascades (Fluid dynamics), Flow (Dynamics), Turbines, Turbulence, Kinetic energy, Blades, Energy dissipation, Pressure, Probes, Rotors
Proceedings Papers

A Comparison Between Measurements and Turbulence Models in a Turbine Cascade Passage

Pietro Zunino, Marina Ubaldi, Antonio Satta, Enrico Peisino
Proc. ASME. GT1988, Volume 1: Turbomachinery, V001T01A082, June 6–9, 1988
Publisher: American Society of Mechanical Engineers
Paper No: 88-GT-226
https://doi.org/10.1115/88-GT-226
View Paper titled, A Comparison Between Measurements and Turbulence Models in a Turbine Cascade Passage
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Topics: Cascades (Fluid dynamics), Turbines, Turbulence, Blades, Flow (Dynamics), Rotors, Stress
Proceedings Papers

Experimental Investigation of the Stalled Flow in a Centrifugal Pump-Turbine With Varied Diffuser

Marina Ubaldi, Pietro Zunino
Proc. ASME. GT1990, Volume 1: Turbomachinery, V001T01A069, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-216
https://doi.org/10.1115/90-GT-216
View Paper titled, Experimental Investigation of the Stalled Flow in a Centrifugal Pump-Turbine With Varied Diffuser
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Topics: Diffusers, Flow (Dynamics), Pump turbines, Pressure, Impellers, Pumps, Fourier transforms, Probes, Signals, Wire
Proceedings Papers

Relative Flow and Turbulence Measurements Downstream of a Backward Centrifugal Impeller

Marina Ubaldi, Pietro Zunino, Andrea Cattanei
Proc. ASME. GT1992, Volume 1: Turbomachinery, V001T01A073, June 1–4, 1992
Publisher: American Society of Mechanical Engineers
Paper No: 92-GT-212
https://doi.org/10.1115/92-GT-212
View Paper titled, Relative Flow and Turbulence Measurements Downstream of a Backward Centrifugal Impeller
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Topics: Flow (Dynamics), Impellers, Turbulence, Pressure, Wakes, Blades, High pressure (Physics), Kinematics, Pressure transducers, Probes
Proceedings Papers

Turbulence Measurements Downstream of a Turbine Cascade at Different Incidence Angles and Pitch-Chord Ratios

Vincenzo Dossena, Antonio Perdichizzi, Marina Ubaldi, Pietro Zunino
Proc. ASME. GT1993, Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, V001T03A020, May 24–27, 1993
Publisher: American Society of Mechanical Engineers
Paper No: 93-GT-052
https://doi.org/10.1115/93-GT-052
View Paper titled, Turbulence Measurements Downstream of a Turbine Cascade at Different Incidence Angles and Pitch-Chord Ratios
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Topics: Cascades (Fluid dynamics), Chords (Trusses), Turbines, Turbulence, Design, Energy dissipation, Flow (Dynamics), Blades, Flow measurement, Stress
Proceedings Papers

An Experimental Investigation of Stator Induced Unsteadiness on Centrifugal Impeller Outflow

Marina Ubaldi, Pietro Zunino, Glovanna Barigozzi, Andrea Cattanel
Proc. ASME. GT1994, Volume 1: Turbomachinery, V001T01A002, June 13–16, 1994
Publisher: American Society of Mechanical Engineers
Paper No: 94-GT-005
https://doi.org/10.1115/94-GT-005
View Paper titled, An Experimental Investigation of Stator Induced Unsteadiness on Centrifugal Impeller Outflow
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Topics: Impellers, Outflow, Stators, Diffusers, Flow (Dynamics), Probes, Blades, Flow measurement, Pressure, Pressure transducers
Proceedings Papers

Detailed Velocity and Turbulence Measurements of the Profile Boundary Layer in a Large Scale Turbine Cascade

Marina Ubaldi, Pietro Zunino, Ugo Campora, Andrea Ghiglione
Proc. ASME. GT1996, Volume 1: Turbomachinery, V001T01A010, June 10–13, 1996
Publisher: American Society of Mechanical Engineers
Paper No: 96-GT-042
https://doi.org/10.1115/96-GT-042
View Paper titled, Detailed Velocity and Turbulence Measurements of the Profile Boundary Layer in a Large Scale Turbine Cascade
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Topics: Boundary layers, Cascades (Fluid dynamics), Turbines, Turbulence, Fibers, Flow (Dynamics), Gages, Lasers, Pressure, Stress
Proceedings Papers

Off-Design Performance of a Highly Loaded LP Turbine Cascade Under Steady and Unsteady Incoming Flow Conditions

Marco Berrino, Daniele Simoni, Marina Ubaldi, Pietro Zunino, Francesco Bertini
Proc. ASME. GT2014, Volume 2D: Turbomachinery, V02DT44A005, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25396
https://doi.org/10.1115/GT2014-25396
View Paper titled, Off-Design Performance of a Highly Loaded LP Turbine Cascade Under Steady and Unsteady Incoming Flow Conditions
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Topics: Cascades (Fluid dynamics), Design, Flow (Dynamics), Turbines, Inflow, Pressure, Blades, Wakes, Aerodynamics, Bearings
Proceedings Papers

Experimental Characterization of the Flow-Field Downstream of an Innovative Ultra Low NO x Injection System

Marco Berrino, Francesca Satta, Marina Ubaldi, Pietro Zunino, Salvatore Colantuoni, Pasquale Di Martino
Proc. ASME. GT2014, Volume 4A: Combustion, Fuels and Emissions, V04AT04A031, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25459
https://doi.org/10.1115/GT2014-25459
View Paper titled, Experimental Characterization of the Flow-Field Downstream of an Innovative Ultra Low NO x Injection System
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Topics: Experimental characterization, Flow (Dynamics), Nitrogen oxides, Combustion chambers, Emissions, Jets, Particulate matter, Wire, Aerodynamics, Computational fluid dynamics
Proceedings Papers

Integrated Experimental and Numerical Approach for Fuel-Air Mixing Prediction in a Heavy-Duty Gas Turbine LP Burner

Giulio Mori, Sandro Razore, Marina Ubaldi, Pietro Zunino
Proc. ASME. GT2000, Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V002T02A042, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0122
https://doi.org/10.1115/2000-GT-0122
View Paper titled, Integrated Experimental and Numerical Approach for Fuel-Air Mixing Prediction in a Heavy-Duty Gas Turbine LP Burner
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Topics: Fuels, Gas turbines, Turbulence, Computational fluid dynamics, Air flow, Combustion, Computer simulation, Electromagnetic scattering, Flames, Flow (Dynamics)
Proceedings Papers

Endwall Effusion Cooling System Behaviour Within a High-Pressure Turbine Cascade: Part 1—Aerodynamic Measurements

Marco Sacchi, Daniele Simoni, Marina Ubaldi, Pietro Zunino, Stefano Zecchi
Proc. ASME. GT2010, Volume 4: Heat Transfer, Parts A and B, 1585-1594, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22931
https://doi.org/10.1115/GT2010-22931
View Paper titled, Endwall Effusion Cooling System Behaviour Within a High-Pressure Turbine Cascade: Part 1—Aerodynamic Measurements
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Topics: Cascades (Fluid dynamics), Cooling systems, High pressure (Physics), Turbines, Flow (Dynamics), Blades, Cooling, Jets, Pressure, Aerodynamics
Proceedings Papers

Wake Control by Boundary Layer Suction Applied to a High-Lift Low-Pressure Turbine Blade

Francesca Satta, Marina Ubaldi, Pietro Zunino, Claudia Schipani
Proc. ASME. GT2010, Volume 7: Turbomachinery, Parts A, B, and C, 1571-1582, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-23475
https://doi.org/10.1115/GT2010-23475
View Paper titled, Wake Control by Boundary Layer Suction Applied to a High-Lift Low-Pressure Turbine Blade
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Topics: Boundary layers, Pressure, Suction, Turbine blades, Wakes, Blades, Cascades (Fluid dynamics), Reynolds number, Turbines, Chords (Trusses)
Proceedings Papers

Boundary Layer Development on a High-Lift LP Turbine Profile Under Passing-Wakes Conditions

Francesca Satta, Daniele Simoni, Marina Ubaldi, Pietro Zunino, Francesco Bertini
Proc. ASME. GT2009, Volume 7: Turbomachinery, Parts A and B, 1753-1764, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59889
https://doi.org/10.1115/GT2009-59889
View Paper titled, Boundary Layer Development on a High-Lift LP Turbine Profile Under Passing-Wakes Conditions
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Topics: Boundary layers, Turbines, Wakes, Reynolds number, Bubbles, Inflow, Rods, Separation (Technology), Suction, Unsteady flow