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Journal Articles

Effects of Ribbed Surfaces on Profile Losses of Low-Pressure Turbine Blades

M. Dellacasagrande, D. Lengani, D. Simoni, M. Ubaldi, F. Bertini
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2023, 145(10): 101009.
Paper No: TURBO-22-1292
https://doi.org/10.1115/1.4063049
Published Online: August 16, 2023
View Article titled, Effects of Ribbed Surfaces on Profile Losses of Low-Pressure Turbine Blades
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Topics: Blades, Boundary layers, Cascades (Fluid dynamics), Flat plates, Geometry, Pressure, Reynolds number, Suction, Turbines, Turbulence
Proceedings Papers

Effects of Ribbed Surfaces on Profile Losses of Low-Pressure-Turbine Blades

M. Dellacasagrande, D. Lengani, D. Simoni, M. Ubaldi, F. Bertini
Proc. ASME. GT2022, Volume 10B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing; Radial Turbomachinery Aerodynamics, V10BT30A029, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82875
https://doi.org/10.1115/GT2022-82875
View Paper titled, Effects of Ribbed Surfaces on Profile Losses of Low-Pressure-Turbine Blades
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Topics: Blades, Pressure, Turbines, Cascades (Fluid dynamics), Flat plates, Boundary layers, Dimensions, Geometry, Inflow, Pressure gradient
Proceedings Papers

Analysis of the Loss Production Mechanism due to Cavity-Main Flow Interaction in a LPT Stage

D. Barsi, D. Lengani, D. Simoni, G. Venturino, F. Bertini, M. Giovannini, F. Rubechini
Proc. ASME. GT2021, Volume 2D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V02DT39A012, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59932
https://doi.org/10.1115/GT2021-59932
View Paper titled, Analysis of the Loss Production Mechanism due to Cavity-Main Flow Interaction in a LPT Stage
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Topics: Cavities, Flow (Dynamics), Cavity flows, Rotors, Simulation, Pressure, Engines, Geometry, Inspection, Stators
Journal Articles

Low Rank Education of Cascade Loss Sensitivity to Unsteady Parameters by Proper Orthogonal Decomposition

D. Lengani, D. Simoni, V. Yepmo, M. Ubaldi, P. Zunino, F. Bertini
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. November 2021, 143(11): 111012.
Paper No: TURBO-20-1423
https://doi.org/10.1115/1.4051273
Published Online: June 23, 2021
View Article titled, Low Rank Education of Cascade Loss Sensitivity to Unsteady Parameters by Proper Orthogonal Decomposition
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Topics: Cascades (Fluid dynamics), Design, Education, Flow (Dynamics), Pressure, Principal component analysis, Reynolds number, Eigenvalues, Wakes, Blades
Proceedings Papers

Low Rank Education of Cascade Loss Sensitivity to Unsteady Parameters by Proper Orthogonal Decomposition

D. Lengani, D. Simoni, V. Yepmo, M. Ubaldi, P. Zunino, F. Bertini
Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A021, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15156
https://doi.org/10.1115/GT2020-15156
View Paper titled, Low Rank Education of Cascade Loss Sensitivity to Unsteady Parameters by Proper Orthogonal Decomposition
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Topics: Cascades (Fluid dynamics), Education, Principal component analysis, Eigenvalues, Flow (Dynamics), Chords (Trusses), Pressure, Approximation, Blades, Design
Journal Articles

Recognition of Structures Leading to Transition in a Low-Pressure Turbine Cascade: Effect of Reduced Frequency

D. Lengani, D. Simoni, M. Ubaldi, P. Zunino, F. Bertini
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. June 2020, 142(6): 061007.
Paper No: TURBO-19-1189
https://doi.org/10.1115/1.4046618
Published Online: May 28, 2020
View Article titled, Recognition of Structures Leading to Transition in a Low-Pressure Turbine Cascade: Effect of Reduced Frequency
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Topics: Blades, Boundary layers, Cascades (Fluid dynamics), Flow (Dynamics), Turbulence, Wakes, Pressure, Suction, Turbines, Fluctuations (Physics)
Proceedings Papers

Recognition of Structures Leading to Transition in a Low Pressure Turbine Cascade: Effect of Reduced Frequency

D. Lengani, D. Simoni, M. Ubaldi, P. Zunino, F. Bertini
Proc. ASME. GT2019, Volume 2A: Turbomachinery, V02AT45A017, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91222
https://doi.org/10.1115/GT2019-91222
View Paper titled, Recognition of Structures Leading to Transition in a Low Pressure Turbine Cascade: Effect of Reduced Frequency
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Topics: Cascades (Fluid dynamics), Pressure, Turbines, Boundary layers, Wakes, Blades, Cycles, Suction, Turbulence, Computation
Proceedings Papers

Turbine Cascade Profile Loss Sensitivity to Incoming Wake Parameters: Effects of Reduced Frequency, Wake Momentum Defect and Axial Gap

D. Simoni, V. Yepmo, P. Zunino, M. Ubaldi, D. Lengani, F. Bertini
Proc. ASME. GT2019, Volume 2A: Turbomachinery, V02AT45A018, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91226
https://doi.org/10.1115/GT2019-91226
View Paper titled, Turbine Cascade Profile Loss Sensitivity to Incoming Wake Parameters: Effects of Reduced Frequency, Wake Momentum Defect and Axial Gap
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Topics: Cascades (Fluid dynamics), Momentum, Turbines, Wakes, Arches, Design, Flow (Dynamics), Inflow, Pressure, Principal component analysis
Journal Articles

On the Identification and Decomposition of the Unsteady Losses in a Turbine Cascade

D. Lengani, D. Simoni, R. Pichler, R. D. Sandberg, V. Michelassi, F. Bertini
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. March 2019, 141(3): 031005.
Paper No: TURBO-18-1252
https://doi.org/10.1115/1.4042164
Published Online: January 16, 2019
View Article titled, On the Identification and Decomposition of the Unsteady Losses in a Turbine Cascade
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Topics: Blades, Boundary layers, Cascades (Fluid dynamics), Flow (Dynamics), Pressure, Suction, Turbines, Turbulence, Wakes, Dynamics (Mechanics)
Proceedings Papers

On the Identification and Decomposition of the Unsteady Losses in a Turbine Cascade

D. Lengani, D. Simoni, R. Pichler, R. Sandberg, V. Michelassi, F. Bertini
Proc. ASME. GT2018, Volume 2A: Turbomachinery, V02AT45A013, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75724
https://doi.org/10.1115/GT2018-75724
View Paper titled, On the Identification and Decomposition of the Unsteady Losses in a Turbine Cascade
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Topics: Cascades (Fluid dynamics), Turbines, Flow (Dynamics), Wakes, Blades, Suction, Boundary layers, Dynamics (Mechanics), Large eddy simulation, Optimization
Journal Articles

Accurate Estimation of Profile Losses and Analysis of Loss Generation Mechanisms in a Turbine Cascade

D. Lengani, D. Simoni, M. Ubaldi, P. Zunino, F. Bertini, V. Michelassi
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. December 2017, 139(12): 121007.
Paper No: TURBO-17-1106
https://doi.org/10.1115/1.4037858
Published Online: October 3, 2017
View Article titled, Accurate Estimation of Profile Losses and Analysis of Loss Generation Mechanisms in a Turbine Cascade
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Topics: Blades, Boundary layers, Cascades (Fluid dynamics), Flow (Dynamics), Suction, Wakes, Turbines, Turbulence, Pressure
Proceedings Papers

Accurate Estimation of Profile Losses and Analysis of Loss Generation Mechanisms in a Turbine Cascade

D. Lengani, D. Simoni, M. Ubaldi, P. Zunino, F. Bertini, V. Michelassi
Proc. ASME. GT2017, Volume 2A: Turbomachinery, V02AT40A021, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64244
https://doi.org/10.1115/GT2017-64244
View Paper titled, Accurate Estimation of Profile Losses and Analysis of Loss Generation Mechanisms in a Turbine Cascade
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Topics: Cascades (Fluid dynamics), Turbines, Wakes, Flow (Dynamics), Pressure, Boundary layers, Probes, Suction, Blades, Dynamics (Mechanics)
Journal Articles

Experimental Investigation on the Time–Space Evolution of a Laminar Separation Bubble by Proper Orthogonal Decomposition and Dynamic Mode Decomposition

D. Lengani, D. Simoni, M. Ubaldi, P. Zunino, F. Bertini
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. March 2017, 139(3): 031006.
Paper No: TURBO-16-1225
https://doi.org/10.1115/1.4034917
Published Online: November 16, 2016
View Article titled, Experimental Investigation on the Time–Space Evolution of a Laminar Separation Bubble by Proper Orthogonal Decomposition and Dynamic Mode Decomposition
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Topics: Bubbles, Dynamics (Mechanics), Eigenvalues, Flow (Dynamics), Fluctuations (Physics), Principal component analysis, Separation (Technology), Shear (Mechanics), Wavelength, Boundary layers
Proceedings Papers

Experimental Investigation on the Time-Space Evolution of a Laminar Separation Bubble by POD and DMD

D. Lengani, D. Simoni, M. Ubaldi, P. Zunino, F. Bertini
Proc. ASME. GT2016, Volume 2B: Turbomachinery, V02BT38A049, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-57581
https://doi.org/10.1115/GT2016-57581
View Paper titled, Experimental Investigation on the Time-Space Evolution of a Laminar Separation Bubble by POD and DMD
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Topics: Bubbles, Separation (Technology), Dynamics (Mechanics), Wavelength, Complex systems, Degrees of freedom, Displacement, Fluctuations (Physics), Kinetic energy, Particulate matter
Proceedings Papers

Dynamics and Turbulence Characteristics of Wake-Boundary Layer Interaction in a Low Pressure Turbine Blade

M. Berrino, D. Lengani, D. Simoni, M. Ubaldi, P. Zunino, F. Bertini
Proc. ASME. GT2015, Volume 2A: Turbomachinery, V02AT38A014, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42626
https://doi.org/10.1115/GT2015-42626
View Paper titled, Dynamics and Turbulence Characteristics of Wake-Boundary Layer Interaction in a Low Pressure Turbine Blade
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Topics: Dynamics (Mechanics), Pressure, Turbine blades, Turbulence, Wakes, Blades, Boundary layers, Eigenvalues, Cascades (Fluid dynamics), Flow (Dynamics)