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John Leggett
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Journal Articles

Direct Numerical Simulation of a High-Pressure Turbine Stage: Unsteady Boundary Layer Transition and the Resulting Flow Structures

Taiyang Wang, Yaomin Zhao, John Leggett, Richard D. Sandberg
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2023, 145(12): 121009.
Paper No: TURBO-23-1160
https://doi.org/10.1115/1.4063510
Published Online: October 19, 2023
View Articletitled, Direct Numerical Simulation of a High-Pressure Turbine Stage: Unsteady Boundary Layer Transition and the Resulting Flow Structures
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Topics: Boundary layers, Flow (Dynamics), Turbulence, Wakes, Suction, Blades, Rotors, Turbines
Proceedings Papers

Entropy Loss Breakdown Comparison for LES and RANS of a Transonic Compressor Stage Midspan Section

Till Borcherding, Christoph Bode, Marco Rosenzweig, Pawel J. Przytarski, John Leggett, Richard D. Sandberg
Proc. ASME. GT2023, Volume 13A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V13AT29A032, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102949
https://doi.org/10.1115/GT2023-102949
View Paper titled, Entropy Loss Breakdown Comparison for LES and RANS of a Transonic Compressor Stage Midspan Section
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Topics: Compressors, Entropy, Reynolds-averaged Navier–Stokes equations
Proceedings Papers

Direct Numerical Simulation of an HPT Stage: Unsteady Boundary Layer Transition and the Resulting Flow Structures

Taiyang Wang, Yaomin Zhao, John Leggett, Richard D. Sandberg
Proc. ASME. GT2023, Volume 13D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V13DT36A011, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102213
https://doi.org/10.1115/GT2023-102213
View Paper titled, Direct Numerical Simulation of an HPT Stage: Unsteady Boundary Layer Transition and the Resulting Flow Structures
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Topics: Boundary layers, Computer simulation, Flow (Dynamics), Wakes, Turbulence, Blades, Boundary layer turbulence, Bubbles, Databases, Free stream turbulence
Proceedings Papers

Highly Resolved Large-Eddy Simulations of a Transonic Compressor Stage Midspan Section Part I: Effect of Inflow Disturbances

Christoph Bode, Pawel J. Przytarski, John Leggett, Richard D. Sandberg
Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A011, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81673
https://doi.org/10.1115/GT2022-81673
View Paper titled, Highly Resolved Large-Eddy Simulations of a Transonic Compressor Stage Midspan Section Part I: Effect of Inflow Disturbances
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Topics: Compressors, Inflow, Large eddy simulation, Shock (Mechanics), Boundary layers, Rotors, Suction, Flow (Dynamics), Stators, Turbulence
Proceedings Papers

Highly Resolved Large-Eddy Simulations of a Transonic Compressor Stage Midspan Section - Part II: Effect of Rotor-Stator Gap

Pawel J. Przytarski, John Leggett, Richard Sandberg, Christoph Bode
Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A019, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82474
https://doi.org/10.1115/GT2022-82474
View Paper titled, Highly Resolved Large-Eddy Simulations of a Transonic Compressor Stage Midspan Section - Part II: Effect of Rotor-Stator Gap
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Topics: Compressors, Large eddy simulation, Rotors, Stators, Flow (Dynamics), Blades, Engineering simulation, Simulation, Boundary layers, Design
Proceedings Papers

High-Fidelity Simulation Study of the Unsteady Flow Effects on High-Pressure Turbine Blade Performance

John Leggett, Yaomin Zhao, Richard D. Sandberg
Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A018, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82370
https://doi.org/10.1115/GT2022-82370
View Paper titled, High-Fidelity Simulation Study of the Unsteady Flow Effects on High-Pressure Turbine Blade Performance
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Topics: High pressure (Physics), Simulation, Turbine blades, Unsteady flow, Turbulence, Blades, Rotors, Wakes, Boundary layers, Flow (Dynamics)
Journal Articles

High-Fidelity Simulation Study of the Unsteady Flow Effects on High-Pressure Turbine Blade Performance

John Leggett, Yaomin Zhao, Richard D. Sandberg
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2023, 145(1): 011002.
Paper No: TURBO-22-1215
https://doi.org/10.1115/1.4055576
Published Online: October 3, 2022
View Articletitled, High-Fidelity Simulation Study of the Unsteady Flow Effects on High-Pressure Turbine Blade Performance
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Topics: Blades, Boundary layers, Flow (Dynamics), Pressure, Rotors, Stators, Suction, Turbulence, Wakes, High pressure (Physics)
Proceedings Papers

Highly Resolved Simulations of a CDA Compressor Cascade: Effect of Reynolds Number on Losses

John Leggett, Richard D. Sandberg
Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A009, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58665
https://doi.org/10.1115/GT2021-58665
View Paper titled, Highly Resolved Simulations of a CDA Compressor Cascade: Effect of Reynolds Number on Losses
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Topics: Cascades (Fluid dynamics), Compressors, Engineering simulation, Reynolds number, Simulation, Blades, Geometry, Wakes, Airfoils, Boundary layers
Proceedings Papers

Turbomachinery Loss Analysis: The Relationship Between Mechanical Work Potential and Entropy Analyses

John Leggett, Yaomin Zhao, Edward S. Richardson, Richard D. Sandberg
Proc. ASME. GT2021, Volume 2C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V02CT34A023, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59436
https://doi.org/10.1115/GT2021-59436
View Paper titled, Turbomachinery Loss Analysis: The Relationship Between Mechanical Work Potential and Entropy Analyses
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Topics: Entropy, Turbomachinery, Energy dissipation, High pressure (Physics), Simulation, Turbulence, Compressors, Computational fluid dynamics, Physics, Pressure
Proceedings Papers

Exploring the Presence of Pressure Waves in Axial Compressor Cascades

John Leggett, Richard Sandberg
Proc. ASME. GT2020, Volume 2A: Turbomachinery, V02AT32A066, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-16022
https://doi.org/10.1115/GT2020-16022
View Paper titled, Exploring the Presence of Pressure Waves in Axial Compressor Cascades
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Topics: Compressors, Pressure, Waves, Cascades (Fluid dynamics), Acoustics, Airfoils, Blades, Separation (Technology), Suction, Vibration
Journal Articles

Loss Analysis of Unsteady Turbomachinery Flows Based on the Mechanical Work Potential

John Leggett, Edward Richardson, Stephan Priebe, Aamir Shabbir, Vittorio Michelassi, Richard Sandberg
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. November 2020, 142(11): 111009.
Paper No: TURBO-20-1041
https://doi.org/10.1115/1.4048162
Published Online: October 16, 2020
View Articletitled, Loss Analysis of Unsteady Turbomachinery Flows Based on the Mechanical Work Potential
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Topics: Blades, Compressors, Energy dissipation, Flow (Dynamics), Pressure, Simulation, Turbomachinery, Turbulence, Wakes, Reynolds-averaged Navier–Stokes equations
Proceedings Papers

Loss Analysis of Unsteady Turbomachinery Flows Based on the Mechanical Work Potential

John Leggett, Edward Richardson, Stephan Priebe, Aamir Shabbir, Vittorio Michelassi, Richard Sandberg
Proc. ASME. GT2019, Volume 2A: Turbomachinery, V02AT45A021, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91253
https://doi.org/10.1115/GT2019-91253
View Paper titled, Loss Analysis of Unsteady Turbomachinery Flows Based on the Mechanical Work Potential
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Topics: Flow (Dynamics), Turbomachinery, Compressors, Cascades (Fluid dynamics), Pressure, Reynolds-averaged Navier–Stokes equations, Wakes, Blades, Energy dissipation, Engines
Journal Articles

Loss Prediction in an Axial Compressor Cascade at Off-Design Incidences With Free Stream Disturbances Using Large Eddy Simulation

John Leggett, Stephan Priebe, Aamir Shabbir, Vittorio Michelassi, Richard Sandberg, Edward Richardson
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. July 2018, 140(7): 071005.
Paper No: TURBO-17-1228
https://doi.org/10.1115/1.4039807
Published Online: June 14, 2018
View Articletitled, Loss Prediction in an Axial Compressor Cascade at Off-Design Incidences With Free Stream Disturbances Using Large Eddy Simulation
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Topics: Blades, Boundary layers, Compressors, Design, Flow (Dynamics), Reynolds-averaged Navier–Stokes equations, Suction, Wakes, Turbulence, Pressure
Proceedings Papers

LES Loss Prediction in an Axial Compressor Cascade at Off-Design Incidences With Free Stream Disturbances

John Leggett, Stephan Priebe, Aamir Shabbir, Richard Sandberg, Edward Richardson, Vittorio Michelassi
Proc. ASME. GT2017, Volume 2A: Turbomachinery, V02AT39A031, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64292
https://doi.org/10.1115/GT2017-64292
View Paper titled, LES Loss Prediction in an Axial Compressor Cascade at Off-Design Incidences With Free Stream Disturbances
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Topics: Cascades (Fluid dynamics), Compressors, Design, Reynolds-averaged Navier–Stokes equations, Bubbles, Computer simulation, Eddies (Fluid dynamics), Large eddy simulation, Optimization, Separation (Technology)
Proceedings Papers

Detailed Investigation of RANS and LES Predictions of Loss Generation in an Axial Compressor Cascade at Off Design Incidences

John Leggett, Stephan Priebe, Richard Sandberg, Vittorio Michelassi, Aamir Shabbir
Proc. ASME. GT2016, Volume 2A: Turbomachinery, V02AT37A050, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-57972
https://doi.org/10.1115/GT2016-57972
View Paper titled, Detailed Investigation of RANS and LES Predictions of Loss Generation in an Axial Compressor Cascade at Off Design Incidences
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Topics: Cascades (Fluid dynamics), Compressors, Design, Reynolds-averaged Navier–Stokes equations, Large eddy simulation, Engineering simulation, Jet engines, Simulation, Turbulence