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Proceedings Papers

Multi-Objective Development of Machine-Learnt Closures for Fully Integrated Transition and Wake Mixing Predictions in Low Pressure Turbines

Harshal D. Akolekar, Fabian Waschkowski, Roberto Pacciani, Yaomin Zhao, Richard D. Sandberg
Proc. ASME. GT2022, Volume 10C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V10CT32A013, June 13–17, 2022
Paper No: GT2022-81091
https://doi.org/10.1115/GT2022-81091
View Paper titled, Multi-Objective Development of Machine-Learnt Closures for Fully Integrated Transition and Wake Mixing Predictions in Low Pressure Turbines
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Topics: Machinery, Pressure, Turbines, Wakes, Blades, Computational fluid dynamics, Machine learning, Boundary layers, Reynolds number, Reynolds-averaged Navier–Stokes equations
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
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
Article Type: Research Papers
Publisher: ASME
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 Article titled, 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

High-Fidelity Simulations of a High-Pressure Turbine Vane With End Walls: Impact of Secondary Structures and Spanwise Temperature Profiles on Losses

Yaomin Zhao, Richard D. Sandberg
Proc. ASME. GT2021, Volume 2B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing, V02BT32A002, June 7–11, 2021
Paper No: GT2021-58816
https://doi.org/10.1115/GT2021-58816
View Paper titled, High-Fidelity Simulations of a High-Pressure Turbine Vane With End Walls: Impact of Secondary Structures and Spanwise Temperature Profiles on Losses
Open the PDF for High-Fidelity Simulations of a High-Pressure Turbine Vane With End Walls: Impact of Secondary Structures and Spanwise Temperature Profiles on Losses in another window
Topics: Engineering simulation, High pressure (Physics), Simulation, Temperature profiles, Turbines, Boundary layers, Blades, Pressure, Suction, Combustion chambers
Proceedings Papers

High-Fidelity Simulations of a High-Pressure Turbine Stage: Effects of Reynolds Number and Inlet Turbulence

Yaomin Zhao, Richard D. Sandberg
Proc. ASME. GT2021, Volume 2B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing, V02BT32A004, June 7–11, 2021
Paper No: GT2021-58995
https://doi.org/10.1115/GT2021-58995
View Paper titled, High-Fidelity Simulations of a High-Pressure Turbine Stage: Effects of Reynolds Number and Inlet Turbulence
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Topics: Engineering simulation, High pressure (Physics), Reynolds number, Simulation, Turbines, Turbulence, Rotors, Wakes, Blades, Flow (Dynamics)
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
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
Journal Articles

Integration of Machine Learning and Computational Fluid Dynamics to Develop Turbulence Models for Improved Low-Pressure Turbine Wake Mixing Prediction

Harshal D. Akolekar, Yaomin Zhao, Richard D. Sandberg, Roberto Pacciani
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. December 2021, 143(12): 121001.
Paper No: TURBO-20-1427
https://doi.org/10.1115/1.4051417
Published Online: June 23, 2021
View Article titled, Integration of Machine Learning and Computational Fluid Dynamics to Develop Turbulence Models for Improved Low-Pressure Turbine Wake Mixing Prediction
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Topics: Blades, Computational fluid dynamics, Reynolds-averaged Navier–Stokes equations, Turbines, Wakes, Flow (Dynamics), Turbulence, Pressure, Model development, Machine learning
Journal Articles

High-Fidelity Simulations of a High-Pressure Turbine Vane Subject to Large Disturbances: Effect of Exit Mach Number on Losses

Yaomin Zhao, Richard D. Sandberg
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. September 2021, 143(9): 091002.
Paper No: TURBO-20-1392
https://doi.org/10.1115/1.4050453
Published Online: May 3, 2021
View Article titled, High-Fidelity Simulations of a High-Pressure Turbine Vane Subject to Large Disturbances: Effect of Exit Mach Number on Losses
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Topics: Blades, Boundary layers, Entropy, Flow (Dynamics), Mach number, Shock (Mechanics), Simulation, Turbulence, Turbines, Pressure
Proceedings Papers

High-Fidelity Simulations of a High-Pressure Turbine Vane Subject to Large Disturbances: Effect of Exit Mach Number on Losses

Yaomin Zhao, Richard D. Sandberg
Proc. ASME. GT2020, Volume 2B: Turbomachinery, V02BT33A007, September 21–25, 2020
Paper No: GT2020-14445
https://doi.org/10.1115/GT2020-14445
View Paper titled, High-Fidelity Simulations of a High-Pressure Turbine Vane Subject to Large Disturbances: Effect of Exit Mach Number on Losses
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Topics: Engineering simulation, High pressure (Physics), Mach number, Simulation, Turbines, Blades, Turbulence, Boundary layers, Flow (Dynamics), Shock (Mechanics)
Proceedings Papers

Integration of Machine Learning and Computational Fluid Dynamics to Develop Turbulence Models for Improved Turbine Wake Mixing Prediction

Harshal D. Akolekar, Yaomin Zhao, Richard D. Sandberg, Roberto Pacciani
Proc. ASME. GT2020, Volume 2C: Turbomachinery, V02CT35A020, September 21–25, 2020
Paper No: GT2020-14732
https://doi.org/10.1115/GT2020-14732
View Paper titled, Integration of Machine Learning and Computational Fluid Dynamics to Develop Turbulence Models for Improved Turbine Wake Mixing Prediction
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Topics: Computational fluid dynamics, Machine learning, Turbines, Turbulence, Wakes, Reynolds-averaged Navier–Stokes equations, Model development, Computer programming, Diffusion (Physics), Modeling
Journal Articles

Using a New Entropy Loss Analysis to Assess the Accuracy of RANS Predictions of an High-Pressure Turbine Vane

Yaomin Zhao, Richard D. Sandberg
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. August 2020, 142(8): 081008.
Paper No: TURBO-20-1017
https://doi.org/10.1115/1.4046531
Published Online: July 29, 2020
View Article titled, Using a New Entropy Loss Analysis to Assess the Accuracy of RANS Predictions of an High-Pressure Turbine Vane
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Topics: Entropy, Reynolds-averaged Navier–Stokes equations, Flow (Dynamics), Turbines
Journal Articles

Large-Eddy Simulation and RANS Analysis of the End-Wall Flow in a Linear Low-Pressure Turbine Cascade, Part I: Flow and Secondary Vorticity Fields Under Varying Inlet Condition

Richard Pichler, Yaomin Zhao, Richard Sandberg, Vittorio Michelassi, Roberto Pacciani, Michele Marconcini, Andrea Arnone
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. December 2019, 141(12): 121005.
Paper No: TURBO-19-1065
https://doi.org/10.1115/1.4045080
Published Online: November 8, 2019
View Article titled, Large-Eddy Simulation and RANS Analysis of the End-Wall Flow in a Linear Low-Pressure Turbine Cascade, Part I: Flow and Secondary Vorticity Fields Under Varying Inlet Condition
Open the PDF for Large-Eddy Simulation and RANS Analysis of the End-Wall Flow in a Linear Low-Pressure Turbine Cascade, Part I: Flow and Secondary Vorticity Fields Under Varying Inlet Condition in another window
Topics: Boundary layers, Flow (Dynamics), Large eddy simulation, Pressure, Reynolds-averaged Navier–Stokes equations, Blades, Vortices, Turbines, Simulation, Cascades (Fluid dynamics)
Proceedings Papers

Using a New Entropy Loss Analysis to Assess the Accuracy of RANS Predictions of an HPT Vane

Yaomin Zhao, Richard D. Sandberg
Proc. ASME. GT2019, Volume 2C: Turbomachinery, V02CT41A003, June 17–21, 2019
Paper No: GT2019-90126
https://doi.org/10.1115/GT2019-90126
View Paper titled, Using a New Entropy Loss Analysis to Assess the Accuracy of RANS Predictions of an HPT Vane
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Topics: Entropy, Reynolds-averaged Navier–Stokes equations, Turbulence, Flow (Dynamics), Energy dissipation, Heat flux, Wakes, Errors, Failure, Fluctuations (Physics)
Journal Articles

Large Eddy Simulation and RANS Analysis of the End-Wall Flow in a Linear Low-Pressure-Turbine Cascade—Part II: Loss Generation

Michele Marconcini, Roberto Pacciani, Andrea Arnone, Vittorio Michelassi, Richard Pichler, Yaomin Zhao, Richard Sandberg
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. May 2019, 141(5): 051004.
Paper No: TURBO-18-1214
https://doi.org/10.1115/1.4042208
Published Online: January 21, 2019
View Article titled, Large Eddy Simulation and RANS Analysis of the End-Wall Flow in a Linear Low-Pressure-Turbine Cascade—Part II: Loss Generation
Open the PDF for Large Eddy Simulation and RANS Analysis of the End-Wall Flow in a Linear Low-Pressure-Turbine Cascade—Part II: Loss Generation in another window
Topics: Blades, Flow (Dynamics), Large eddy simulation, Pressure, Reynolds-averaged Navier–Stokes equations, Turbines, Turbulence, Cascades (Fluid dynamics), Vortices, Vorticity
Proceedings Papers

LES and RANS Analysis of the End-Wall Flow in a Linear LPT Cascade With Variable Inlet Conditions: Part II — Loss Generation

Michele Marconcini, Roberto Pacciani, Andrea Arnone, Vittorio Michelassi, Richard Pichler, Yaomin Zhao, Richard Sandberg
Proc. ASME. GT2018, Volume 2B: Turbomachinery, V02BT41A024, June 11–15, 2018
Paper No: GT2018-76450
https://doi.org/10.1115/GT2018-76450
View Paper titled, LES and RANS Analysis of the End-Wall Flow in a Linear LPT Cascade With Variable Inlet Conditions: Part II — Loss Generation
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Topics: Cascades (Fluid dynamics), Flow (Dynamics), Reynolds-averaged Navier–Stokes equations, Boundary layers, Design, Blades, Pressure, Turbines, Vortices, Computational fluid dynamics
Proceedings Papers

LES and RANS Analysis of the End-Wall Flow in a Linear LPT Cascade: Part I — Flow and Secondary Vorticity Fields Under Varying Inlet Condition

R. Pichler, Yaomin Zhao, R. D. Sandberg, V. Michelassi, R. Pacciani, M. Marconcini, A. Arnone
Proc. ASME. GT2018, Volume 2B: Turbomachinery, V02BT41A020, June 11–15, 2018
Paper No: GT2018-76233
https://doi.org/10.1115/GT2018-76233
View Paper titled, LES and RANS Analysis of the End-Wall Flow in a Linear LPT Cascade: Part I — Flow and Secondary Vorticity Fields Under Varying Inlet Condition
Open the PDF for LES and RANS Analysis of the End-Wall Flow in a Linear LPT Cascade: Part I — Flow and Secondary Vorticity Fields Under Varying Inlet Condition in another window
Topics: Cascades (Fluid dynamics), Flow (Dynamics), Reynolds-averaged Navier–Stokes equations, Vorticity, Boundary layers, Blades, Design, Vortices, Computational fluid dynamics, Engineering simulation