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Journal Articles

Extending Highly Loaded Axial Fan Operability Range Through Novel Blade Design

Diego I. Lopez, Tiziano Ghisu, Timoleon Kipouros, Shahrokh Shahpar, Mark Wilson
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2022, 144(12): 121009.
Paper No: TURBO-22-1121
https://doi.org/10.1115/1.4055350
Published Online: September 19, 2022
View Article titled, Extending Highly Loaded Axial Fan Operability Range Through Novel Blade Design
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Topics: Blades, Design, Computational fluid dynamics, Flow (Dynamics), Stability, Pressure, Momentum, Leakage flows, Leakage
Journal Articles

High-Fidelity Computational Fluid Dynamics Analysis of In-Serviced Shrouded High-Pressure Turbine Rotor Blades

Mario Carta, Tiziano Ghisu, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2022, 144(12): 121001.
Paper No: TURBO-22-1122
https://doi.org/10.1115/1.4055267
Published Online: September 13, 2022
View Article titled, High-Fidelity Computational Fluid Dynamics Analysis of In-Serviced Shrouded High-Pressure Turbine Rotor Blades
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Topics: Blades, Computational fluid dynamics, Damage, Rotors, Shapes, Turbines, Reverse engineering, High pressure (Physics), Flow (Dynamics), Airfoils
Journal Articles

Automatic Design Optimization of a Transonic Compressor Rotor for Improving Aeroacoustic and Aerodynamic Performance

Long Wu, Jae-Wook Kim, Alexander George Wilson, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. August 2022, 144(8): 081016.
Paper No: TURBO-21-1084
https://doi.org/10.1115/1.4053916
Published Online: March 16, 2022
View Article titled, Automatic Design Optimization of a Transonic Compressor Rotor for Improving Aeroacoustic and Aerodynamic Performance
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Topics: Blades, Design, Flow (Dynamics), Noise (Sound), Optimization, Rotors, Pressure, Shock (Mechanics), Simulation
Journal Articles

Exploring Topology Optimization for High Pressure Turbine Blade Tips

Luka Vincekovic, Alistair John, Ning Qin, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2022, 144(7): 071013.
Paper No: TURBO-21-1167
https://doi.org/10.1115/1.4053917
Published Online: March 16, 2022
View Article titled, Exploring Topology Optimization for High Pressure Turbine Blade Tips
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Topics: Blades, Design, Optimization, Topology, High pressure (Physics), Turbines, Pressure, Flow (Dynamics), Parametrization
Journal Articles

Elasto-Hydrodynamic Model of Hybrid Journal Bearings for Aero-Engine Gear Fuel Pump Applications

Jacopo Tacconi, Shahrokh Shahpar, Andrew King, Johannes-Paulus Olufeagba, Raymarn Khan, Ian Sant, Martin Yates
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. March 2022, 144(3): 031604.
Paper No: TRIB-21-1304
https://doi.org/10.1115/1.4052479
Published Online: November 9, 2021
View Article titled, Elasto-Hydrodynamic Model of Hybrid Journal Bearings for Aero-Engine Gear Fuel Pump Applications
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Topics: Bearings, Equilibrium (Physics), Pressure, Stress, Journal bearings, Film thickness, Engines, Algorithms, Fuel pumps
Journal Articles

Global Optimization of a Transonic Fan Blade Through AI-Enabled Active Subspaces

Diego I. Lopez, Tiziano Ghisu, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2022, 144(1): 011013.
Paper No: TURBO-21-1141
https://doi.org/10.1115/1.4052136
Published Online: September 21, 2021
View Article titled, Global Optimization of a Transonic Fan Blade Through AI-Enabled Active Subspaces
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Topics: Blades, Design, Optimization, Computational fluid dynamics, Artificial neural networks
Journal Articles

Application of an Immersed Boundary Method on an Instrumented Turbine Blade With Large Eddy Simulation

Bryn N. Ubald, Rob Watson, Jiahuan Cui, Paul Tucker, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. November 2021, 143(11): 111005.
Paper No: TURBO-20-1276
https://doi.org/10.1115/1.4051110
Published Online: June 15, 2021
View Article titled, Application of an Immersed Boundary Method on an Instrumented Turbine Blade With Large Eddy Simulation
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Topics: Blades, Large eddy simulation, Pressure, Probes, Turbine blades, Turbulence, Flow (Dynamics), Anisotropy
Journal Articles

Using Shock Control Bumps to Improve Transonic Fan/Compressor Blade Performance

Alistair John, Ning Qin, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. August 2019, 141(8): 081003.
Paper No: TURBO-18-1271
https://doi.org/10.1115/1.4042891
Published Online: March 2, 2019
View Article titled, Using Shock Control Bumps to Improve Transonic Fan/Compressor Blade Performance
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Topics: Blades, Design, Flow (Dynamics), Geometry, Optimization, Shock (Mechanics), Separation (Technology), Rotors, Compressors
Journal Articles

Numerical Analysis of an Instrumented Turbine Blade Cascade

Bryn N. Ubald, Paul G. Tucker, Jiahuan Cui, Rob Watson, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. May 2019, 141(5): 051013.
Paper No: TURBO-18-1272
https://doi.org/10.1115/1.4041935
Published Online: March 1, 2019
View Article titled, Numerical Analysis of an Instrumented Turbine Blade Cascade
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Topics: Blades, Bubbles, Cascades (Fluid dynamics), Flow (Dynamics), Numerical analysis, Pressure, Probes, Separation (Technology), Turbulence, Inflow
Proceedings Papers

Efficient Adjoint-Based Mesh Adaptation Applied to Turbo-Machinery Flows

Guglielmo Vivarelli, Ning Qin, Shahrokh Shahpar, David Radford
Proc. ASME. GT2018, Volume 2C: Turbomachinery, V02CT42A049, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-77066
https://doi.org/10.1115/GT2018-77066
View Paper titled, Efficient Adjoint-Based Mesh Adaptation Applied to Turbo-Machinery Flows
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Topics: Flow (Dynamics), Turbomachinery, Errors, Computer software, Engineers, Interpolation, Springs, Stiffness
Proceedings Papers

Using Shock Control Bumps to Improve Transonic Fan/Compressor Blade Performance

Alistair John, Ning Qin, Shahrokh Shahpar
Proc. ASME. GT2018, Volume 2A: Turbomachinery, V02AT39A042, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-77065
https://doi.org/10.1115/GT2018-77065
View Paper titled, Using Shock Control Bumps to Improve Transonic Fan/Compressor Blade Performance
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Topics: Blades, Compressors, Shock (Mechanics), Separation (Technology), Turbomachinery, Delays, Design, Geometry, Optimization, Stall inception
Proceedings Papers

Numerical Analysis of an Instrumented Turbine Blade Cascade

Bryn N. Ubald, Jiahuan Cui, Rob Watson, Paul G. Tucker, Shahrokh Shahpar
Proc. ASME. GT2018, Volume 2A: Turbomachinery, V02AT45A034, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-77012
https://doi.org/10.1115/GT2018-77012
View Paper titled, Numerical Analysis of an Instrumented Turbine Blade Cascade
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Topics: Cascades (Fluid dynamics), Numerical analysis, Turbine blades, Probes, Flow (Dynamics), Blades, Turbulence, Accuracy and precision, Bubbles, Engines
Journal Articles

Affordable Uncertainty Quantification for Industrial Problems: Application to Aero-Engine Fans

Tiziano Ghisu, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. May 2018, 140(6): 061005.
Paper No: TURBO-17-1198
https://doi.org/10.1115/1.4038982
Published Online: April 27, 2018
View Article titled, Affordable Uncertainty Quantification for Industrial Problems: Application to Aero-Engine Fans
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Topics: Blades, Design, Geometry, Polynomials, Pressure, Uncertainty, Uncertainty quantification, Fans, Chaos, Flow (Dynamics)
Journal Articles

The Impact of Realistic Casing Geometries and Clearances on Fan Blade Tip Aerodynamics

Alistair John, Ning Qin, Shahrokh Shahpar
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. May 2018, 140(6): 061002.
Paper No: TURBO-17-1166
https://doi.org/10.1115/1.4038834
Published Online: April 18, 2018
View Article titled, The Impact of Realistic Casing Geometries and Clearances on Fan Blade Tip Aerodynamics
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Topics: Blades, Clearances (Engineering), Aerodynamics, Flow (Dynamics), Design
Journal Articles

Turbomachinery Active Subspace Performance Maps

Pranay Seshadri, Shahrokh Shahpar, Paul Constantine, Geoffrey Parks, Mike Adams
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. April 2018, 140(4): 041003.
Paper No: TURBO-17-1193
https://doi.org/10.1115/1.4038839
Published Online: January 17, 2018
View Article titled, Turbomachinery Active Subspace Performance Maps
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Topics: Blades, Design, Flow (Dynamics), Pressure, Turbomachinery, Manufacturing, Geometry
Proceedings Papers

Multi-Fidelity Modelling of a Fully-Featured HP Turbine Stage

Giorgio Occhioni, Shahrokh Shahpar, Haidong Li
Proc. ASME. GT2017, Volume 2A: Turbomachinery, V02AT40A027, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64478
https://doi.org/10.1115/GT2017-64478
View Paper titled, Multi-Fidelity Modelling of a Fully-Featured HP Turbine Stage
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Topics: Modeling, Turbines, Film cooling, Strips, Cooling, High pressure (Physics), Nozzle guide vanes, Reynolds-averaged Navier–Stokes equations, Rotors, Simulation
Proceedings Papers

Fan Blade Tip Aerodynamics With Realistic Operational Casing Geometries and Clearances

Alistair John, Ning Qin, Shahrokh Shahpar
Proc. ASME. GT2017, Volume 2A: Turbomachinery, V02AT39A033, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64403
https://doi.org/10.1115/GT2017-64403
View Paper titled, Fan Blade Tip Aerodynamics With Realistic Operational Casing Geometries and Clearances
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Topics: Aerodynamics, Blades, Clearances (Engineering), Engines, Flow (Dynamics), Response surface methodology
Proceedings Papers

Turbomachinery Active Subspace Performance Maps

Pranay Seshadri, Shahrokh Shahpar, Paul Constantine, Geoffrey Parks, Mike Adams
Proc. ASME. GT2017, Volume 2A: Turbomachinery, V02AT39A034, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64528
https://doi.org/10.1115/GT2017-64528
View Paper titled, Turbomachinery Active Subspace Performance Maps
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Topics: Turbomachinery, Design, Flow (Dynamics), Blades, Manufacturing, Aerodynamics, Pressure, Dimensions, Space, Tradeoffs
Proceedings Papers

Comparative Analysis of Methodologies for Uncertainty Propagation and Quantification

Alessandra Cuneo, Alberto Traverso, Shahrokh Shahpar
Proc. ASME. GT2017, Volume 2C: Turbomachinery, V02CT47A005, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63238
https://doi.org/10.1115/GT2017-63238
View Paper titled, Comparative Analysis of Methodologies for Uncertainty Propagation and Quantification
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Topics: Uncertainty, Polynomials, Chaos, Design, Engineering design, Simulation, Approximation, Disks, High pressure (Physics), Manufacturing
Proceedings Papers

Toward Affordable Uncertainty Quantification for Industrial Problems: Part I — Theory and Validation

Tiziano Ghisu, Shahrokh Shahpar
Proc. ASME. GT2017, Volume 2C: Turbomachinery, V02CT47A019, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64842
https://doi.org/10.1115/GT2017-64842
View Paper titled, Toward Affordable Uncertainty Quantification for Industrial Problems: Part I — Theory and Validation
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Topics: Uncertainty quantification, Polynomials, Uncertainty, Approximation, Chaos, Deflection, Least squares approximations, Tensors