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Proceedings Papers

Investigation on Strain and Stress Principal Axes in Unsteady DNS Turbine Data

D. Lengani, D. Simoni, L. De Vincentiis, K. Ðurović, J. Pralits, D. S. Henningson, A. Hanifi

Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A031, June 13–17, 2022

Paper No: GT2022-83197

DOI: https://doi.org/10.1115/GT2022-83197

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Topics: Stress, Turbines, Turbulence, Tensors, Eigenvalues, Blades, Boundary layers, Reynolds stress, Suction, Cascades (Fluid dynamics)

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

Paper No: GT2022-82875

DOI: https://doi.org/10.1115/GT2022-82875

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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

Paper No: GT2021-59932

DOI: https://doi.org/10.1115/GT2021-59932

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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

J. Turbomach. November 2021, 143(11): 111012.

Paper No: TURBO-20-1423

DOI: https://doi.org/10.1115/1.4051273

Published Online: June 23, 2021

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Topics: Cascades (Fluid dynamics), Design, Education, Flow (Dynamics), Pressure, Principal component analysis, Reynolds number, Eigenvalues, Wakes, Blades

Proceedings Papers

Experimental Investigation on the Loss Production Mechanisms in Transitional Boundary Layers

M. Dellacasagrande, D. Lengani, D. Simoni, M. Ubaldi, P. Zunino

Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A019, September 21–25, 2020

Paper No: GT2020-15148

DOI: https://doi.org/10.1115/GT2020-15148

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Topics: Boundary layers, Flow (Dynamics), Eigenvalues, Turbulence, Pressure gradient, Shear (Mechanics), Stress tensors, Bubbles, Displacement, Energy dissipation

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

Paper No: GT2020-15156

DOI: https://doi.org/10.1115/GT2020-15156

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Topics: Cascades (Fluid dynamics), Education, Principal component analysis, Eigenvalues, Flow (Dynamics), Chords (Trusses), Pressure, Approximation, Blades, Design

Proceedings Papers

Dynamic Mode Decomposition Analysis of Separated Boundary Layers Under Variable Reynolds Number and Free-Stream Turbulence

M. Dellacasagrande, J. Verdoya, D. Barsi, D. Lengani, D. Simoni

Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A038, September 21–25, 2020

Paper No: GT2020-16322

DOI: https://doi.org/10.1115/GT2020-16322

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Topics: Boundary layers, Reynolds number, Turbulence, Wavelength, Fluctuations (Physics), Shear (Mechanics), Vortices, Accounting, Control systems, Density

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

J. Turbomach. June 2020, 142(6): 061007.

Paper No: TURBO-19-1189

DOI: https://doi.org/10.1115/1.4046618

Published Online: May 28, 2020

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Topics: Blades, Boundary layers, Cascades (Fluid dynamics), Flow (Dynamics), Turbulence, Wakes, Pressure, Suction, Turbines, Fluctuations (Physics)

Journal Articles

Evaluation of Turbulent Spot Production Rate in Boundary Layers Under Variable Pressure Gradients for Gas Turbine Applications

M. Dellacasagrande, D. Lengani, D. Simoni, M. Ubaldi, P. Zunino

J. Turbomach. June 2020, 142(6): 061003.

Paper No: TURBO-19-1180

DOI: https://doi.org/10.1115/1.4046494

Published Online: May 12, 2020

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Topics: Boundary layers, Flow (Dynamics), Pressure gradient, Reynolds number, Turbulence, Separation (Technology), Gas turbines

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

Paper No: GT2019-91222

DOI: https://doi.org/10.1115/GT2019-91222

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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

Paper No: GT2019-91226

DOI: https://doi.org/10.1115/GT2019-91226

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Topics: Cascades (Fluid dynamics), Momentum, Turbines, Wakes, Arches, Design, Flow (Dynamics), Inflow, Pressure, Principal component analysis

Proceedings Papers

Evaluation of Turbulent Spot Production Rate in Boundary Layers Under Variable Pressure Gradients for Gas Turbine Applications

M. Dellacasagrande, D. Lengani, D. Simoni, M. Ubaldi, P. Zunino

Proc. ASME. GT2019, Volume 2A: Turbomachinery, V02AT45A019, June 17–21, 2019

Paper No: GT2019-91229

DOI: https://doi.org/10.1115/GT2019-91229

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Topics: Boundary layers, Gas turbines, Pressure gradient, Turbulence, Flow (Dynamics), Reynolds number, Arches, Databases, Flat plates, Probability

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

J. Turbomach. March 2019, 141(3): 031005.

Paper No: TURBO-18-1252

DOI: https://doi.org/10.1115/1.4042164

Published Online: January 16, 2019

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Topics: Blades, Boundary layers, Cascades (Fluid dynamics), Flow (Dynamics), Pressure, Suction, Turbines, Turbulence, Wakes, Dynamics (Mechanics)

Journal Articles

Correlations for the Prediction of Intermittency and Turbulent Spot Production Rate in Separated Flows

M. Dellacasagrande, R. Guida, D. Lengani, D. Simoni, M. Ubaldi, P. Zunino

J. Turbomach. March 2019, 141(3): 031003.

Paper No: TURBO-18-1164

DOI: https://doi.org/10.1115/1.4042066

Published Online: January 16, 2019

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Topics: Boundary layers, Flow (Dynamics), Reynolds number, Separation (Technology), Turbulence, Fittings, Bubbles, Shear (Mechanics)

Proceedings Papers

New Facility Setup for the Investigation of Cooling Flow, Viscous and Rotational Effects on the Interstage Seal Flow Behavior of a Gas Turbine

R. Guida, D. Lengani, D. Simoni, M. Ubaldi, P. Zunino

Proc. ASME. GT2018, Volume 5B: Heat Transfer, V05BT15A017, June 11–15, 2018

Paper No: GT2018-75630

DOI: https://doi.org/10.1115/GT2018-75630

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Topics: Cooling, Flow (Dynamics), Gas turbines, Cavities, Coolants, Pressure, Cavity flows, Discharge coefficient, Turbines, Annulus

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

Paper No: GT2018-75724

DOI: https://doi.org/10.1115/GT2018-75724

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Topics: Cascades (Fluid dynamics), Turbines, Flow (Dynamics), Wakes, Blades, Suction, Boundary layers, Dynamics (Mechanics), Large eddy simulation, Optimization

Proceedings Papers

Correlations for the Prediction of Intermittency and Turbulent Spot Production Rate in Separated Flows

M. Dellacasagrande, R. Guida, D. Lengani, D. Simoni, M. Ubaldi, P. Zunino

Proc. ASME. GT2018, Volume 2C: Turbomachinery, V02CT42A015, June 11–15, 2018

Paper No: GT2018-75624

DOI: https://doi.org/10.1115/GT2018-75624

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Topics: Flow (Dynamics), Turbulence, Reynolds number, Separation (Technology), Boundary layers, Bubbles, Dynamics (Mechanics), Fittings, Particulate matter, Pressure gradient

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

J. Turbomach. December 2017, 139(12): 121007.

Paper No: TURBO-17-1106

DOI: https://doi.org/10.1115/1.4037858

Published Online: October 3, 2017

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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

Paper No: GT2017-64244

DOI: https://doi.org/10.1115/GT2017-64244

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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

J. Turbomach. March 2017, 139(3): 031006.

Paper No: TURBO-16-1225

DOI: https://doi.org/10.1115/1.4034917

Published Online: November 16, 2016

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Topics: Bubbles, Dynamics (Mechanics), Eigenvalues, Flow (Dynamics), Fluctuations (Physics), Principal component analysis, Separation (Technology), Shear (Mechanics), Wavelength, Boundary layers

Journal citation

NARROW

Investigation on Strain and Stress Principal Axes in Unsteady DNS Turbine Data

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

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

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

Experimental Investigation on the Loss Production Mechanisms in Transitional Boundary Layers

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

Dynamic Mode Decomposition Analysis of Separated Boundary Layers Under Variable Reynolds Number and Free-Stream Turbulence

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

Evaluation of Turbulent Spot Production Rate in Boundary Layers Under Variable Pressure Gradients for Gas Turbine Applications

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

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

Evaluation of Turbulent Spot Production Rate in Boundary Layers Under Variable Pressure Gradients for Gas Turbine Applications

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

Correlations for the Prediction of Intermittency and Turbulent Spot Production Rate in Separated Flows

New Facility Setup for the Investigation of Cooling Flow, Viscous and Rotational Effects on the Interstage Seal Flow Behavior of a Gas Turbine

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

Correlations for the Prediction of Intermittency and Turbulent Spot Production Rate in Separated Flows

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

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

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

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