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Journal Articles

Response of Separated Boundary Layers to Steady and Pulsated Flow Injection

Hunter D. Nowak, Federico Lluesma-Rodriguez, Iman Rahbari, John P. Clark, Guillermo Paniagua
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. June 2023, 145(6): 061001.
Paper No: TURBO-22-1276
DOI: https://doi.org/10.1115/1.4056184
Published Online: December 6, 2022
View Article titled, Response of Separated Boundary Layers to Steady and Pulsated Flow Injection
Click here to open pdf in another window PDF for Response of Separated Boundary Layers to Steady and Pulsated Flow Injection
Topics: Flow (Dynamics), Flow control, Pressure, Separation (Technology), Reynolds-averaged Navier–Stokes equations
Proceedings Papers

Response of Separated Boundary Layers to Steady and Pulsated Flow Injection in Transonic Internal Flows

Hunter D. Nowak, Federico Lluesma-Rodriguez, Iman Rahbari, John P. Clark, Guillermo Paniagua
Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T05A021, June 13–17, 2022
Paper No: GT2022-83152
DOI: https://doi.org/10.1115/GT2022-83152
View Paper titled, Response of Separated Boundary Layers to Steady and Pulsated Flow Injection in Transonic Internal Flows
Click here to open pdf in another window PDF for Response of Separated Boundary Layers to Steady and Pulsated Flow Injection in Transonic Internal Flows
Topics: Boundary layers, Flow (Dynamics), Internal flow, Separation (Technology), Computational fluid dynamics, Energy generation, Flight, Flow control, Flow separation, Reynolds number
Proceedings Papers

An Alternate Means to Form Non-Dimensional Products in Dimensional Analysis

John P. Clark
Proc. ASME. GT2022, Volume 5: Education; Electric Power; Fans and Blowers, V005T08A003, June 13–17, 2022
Paper No: GT2022-81558
DOI: https://doi.org/10.1115/GT2022-81558
View Paper titled, An Alternate Means to Form Non-Dimensional Products in Dimensional Analysis
Click here to open pdf in another window PDF for An Alternate Means to Form Non-Dimensional Products in Dimensional Analysis
Topics: Dimensional analysis
Journal Articles

Detailed Velocity and Heat Transfer Measurements in an Advanced Gas Turbine Vane Insert Using Magnetic Resonance Velocimetry and Infrared Thermometry

Michael J. Benson, David Bindon, Mattias Cooper, F. Todd Davidson, Benjamin Duhaime, David Helmer, Robert Woodings, Bret P. Van Poppel, Christopher J. Elkins, John P. Clark
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. February 2022, 144(2): 021009.
Paper No: TURBO-21-1113
DOI: https://doi.org/10.1115/1.4052310
Published Online: September 29, 2021
View Article titled, Detailed Velocity and Heat Transfer Measurements in an Advanced Gas Turbine Vane Insert Using Magnetic Resonance Velocimetry and Infrared Thermometry
Click here to open pdf in another window PDF for Detailed Velocity and Heat Transfer Measurements in an Advanced Gas Turbine Vane Insert Using Magnetic Resonance Velocimetry and Infrared Thermometry
Topics: Cooling, Flow (Dynamics), Gas turbines, Heat transfer, Magnetic resonance, Temperature, Temperature measurement, Design, Steady state, Impingement cooling
Proceedings Papers

Effects of Trailing Edge Thickness and Blade Loading Distribution on the Aerodynamic Performance of Simulated CMC Turbine Blades

Paul W. Giel, Vikram Shyam, Paht Juangphanich, John P. Clark
Proc. ASME. GT2020, Volume 2B: Turbomachinery, V02BT33A028, September 21–25, 2020
Paper No: GT2020-15802
DOI: https://doi.org/10.1115/GT2020-15802
View Paper titled, Effects of Trailing Edge Thickness and Blade Loading Distribution on the Aerodynamic Performance of Simulated CMC Turbine Blades
Click here to open pdf in another window PDF for Effects of Trailing Edge Thickness and Blade Loading Distribution on the Aerodynamic Performance of Simulated CMC Turbine Blades
Topics: Blades, Ceramic matrix composites, Turbine blades, Reynolds number, Turbulence, Cascades (Fluid dynamics), Chords (Trusses), Design, Dimensions, Mach number
Proceedings Papers

Detailed Velocity and Heat Transfer Measurements in an Advanced Gas Turbine Vane Insert Using MRV and IR Thermometry

Michael J. Benson, David Bindon, Mattias Cooper, F. Todd Davidson, Benjamin Duhaime, David Helmer, Robert Woodings, Bret P. Van Poppel, Christopher J. Elkins, John P. Clark
Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT15A016, September 21–25, 2020
Paper No: GT2020-14984
DOI: https://doi.org/10.1115/GT2020-14984
View Paper titled, Detailed Velocity and Heat Transfer Measurements in an Advanced Gas Turbine Vane Insert Using MRV and IR Thermometry
Click here to open pdf in another window PDF for Detailed Velocity and Heat Transfer Measurements in an Advanced Gas Turbine Vane Insert Using MRV and IR Thermometry
Topics: Gas turbines, Heat transfer, Temperature measurement, Cooling, Flow (Dynamics), Computer simulation, Design, Magnetic resonance, Manufacturing, Measurement uncertainty
Proceedings Papers

Phantom Cooling Effects on Rotor Blade Surface Heat Flux in a Transonic Full Scale 1+1/2 Stage Rotating Turbine

Richard J. Anthony, John Finnegan, John P. Clark
Proc. ASME. GT2020, Volume 7C: Heat Transfer, V07CT13A024, September 21–25, 2020
Paper No: GT2020-15836
DOI: https://doi.org/10.1115/GT2020-15836
View Paper titled, Phantom Cooling Effects on Rotor Blade Surface Heat Flux in a Transonic Full Scale 1+1/2 Stage Rotating Turbine
Click here to open pdf in another window PDF for Phantom Cooling Effects on Rotor Blade Surface Heat Flux in a Transonic Full Scale 1+1/2 Stage Rotating Turbine
Topics: Blades, Heat flux, Phantom cooling, Rotors, Turbines, Film cooling, High pressure (Physics), Pressure, Air Force, Leakage flows
Proceedings Papers

A Low Reynolds Number Experimental Evaluation of Tubercles on a Low-Pressure Turbine Cascade

Stephen A. Pym, Asad Asghar, William D. E. Allan, John P. Clark
Proc. ASME. GT2019, Volume 2B: Turbomachinery, V02BT40A028, June 17–21, 2019
Paper No: GT2019-91699
DOI: https://doi.org/10.1115/GT2019-91699
View Paper titled, A Low Reynolds Number Experimental Evaluation of Tubercles on a Low-Pressure Turbine Cascade
Click here to open pdf in another window PDF for A Low Reynolds Number Experimental Evaluation of Tubercles on a Low-Pressure Turbine Cascade
Topics: Cascades (Fluid dynamics), Pressure, Reynolds number, Turbines, Blades, Boundary layers, Engines, Suction, Turbine blades, Aircraft
Journal Articles

Effects of Downstream Vane Bowing and Asymmetry on Unsteadiness in a Transonic Turbine

John P. Clark, Richard J. Anthony, Michael K. Ooten, John M. Finnegan, P. Dean Johnson, Ron-Ho Ni
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. October 2018, 140(10): 101006.
Paper No: TURBO-18-1160
DOI: https://doi.org/10.1115/1.4040998
Published Online: September 28, 2018
View Article titled, Effects of Downstream Vane Bowing and Asymmetry on Unsteadiness in a Transonic Turbine
Click here to open pdf in another window PDF for Effects of Downstream Vane Bowing and Asymmetry on Unsteadiness in a Transonic Turbine
Topics: Airfoils, Blades, Design, Pressure, Shock (Mechanics), Suction, Turbines, Simulation
Proceedings Papers

Effects of Downstream Vane Bowing and Asymmetry on Unsteadiness in a Transonic Turbine

John P. Clark, Richard J. Anthony, Michael K. Ooten, John M. Finnegan, P. Dean Johnson, Ron-Ho Ni
Proc. ASME. GT2018, Volume 2A: Turbomachinery, V02AT45A029, June 11–15, 2018
Paper No: GT2018-76735
DOI: https://doi.org/10.1115/GT2018-76735
View Paper titled, Effects of Downstream Vane Bowing and Asymmetry on Unsteadiness in a Transonic Turbine
Click here to open pdf in another window PDF for Effects of Downstream Vane Bowing and Asymmetry on Unsteadiness in a Transonic Turbine
Topics: Turbines, Blades, Design, Shock (Mechanics), Turbine blades, Airfoils, Annulus, Cycles, Engineering simulation, Gas turbines
Journal Articles

The Effect of Manufacturing Variations on Unsteady Interaction in a Transonic Turbine

John P. Clark, Joseph A. Beck, Alex A. Kaszynski, Angela Still, Ron-Ho Ni
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. May 2018, 140(6): 061007.
Paper No: TURBO-17-1197
DOI: https://doi.org/10.1115/1.4039361
Published Online: April 30, 2018
View Article titled, The Effect of Manufacturing Variations on Unsteady Interaction in a Transonic Turbine
Click here to open pdf in another window PDF for The Effect of Manufacturing Variations on Unsteady Interaction in a Transonic Turbine
Topics: Airfoils, Blades, Computational fluid dynamics, Geometry, Manufacturing, Pressure, Turbines, Shock (Mechanics), Wheels, Design
Proceedings Papers

The Effect of Manufacturing Variations on Unsteady Interaction in a Transonic Turbine

John P. Clark, Joseph A. Beck, Alex A. Kaszynski, Angela Still, Ron-Ho Ni
Proc. ASME. GT2017, Volume 2B: Turbomachinery, V02BT41A029, June 26–30, 2017
Paper No: GT2017-64075
DOI: https://doi.org/10.1115/GT2017-64075
View Paper titled, The Effect of Manufacturing Variations on Unsteady Interaction in a Transonic Turbine
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Topics: Manufacturing, Turbines, Computational fluid dynamics, Blades, Geometry, Turbine blades, Airfoils, Algorithms, Artificial neural networks, Casting
Journal Articles

Unsteady Aerodynamic Interaction in a Closely Coupled Turbine Consistent With Contrarotation

Michael K. Ooten, Richard J. Anthony, Andrew T. Lethander, John P. Clark
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. June 2016, 138(6): 061004.
Paper No: TURBO-15-1259
DOI: https://doi.org/10.1115/1.4032284
Published Online: February 9, 2016
View Article titled, Unsteady Aerodynamic Interaction in a Closely Coupled Turbine Consistent With Contrarotation
Click here to open pdf in another window PDF for Unsteady Aerodynamic Interaction in a Closely Coupled Turbine Consistent With Contrarotation
Topics: Blades, Pressure, Shock (Mechanics), Turbines, Computational fluid dynamics, Suction, Flow (Dynamics)
Proceedings Papers

Unsteady Aerodynamic Interaction in a Closely-Coupled Turbine Consistent With Contra-Rotation

Michael K. Ooten, Richard J. Anthony, Andrew T. Lethander, John P. Clark
Proc. ASME. GT2015, Volume 2C: Turbomachinery, V02CT44A007, June 15–19, 2015
Paper No: GT2015-42416
DOI: https://doi.org/10.1115/GT2015-42416
View Paper titled, Unsteady Aerodynamic Interaction in a Closely-Coupled Turbine Consistent With Contra-Rotation
Click here to open pdf in another window PDF for Unsteady Aerodynamic Interaction in a Closely-Coupled Turbine Consistent With Contra-Rotation
Topics: Rotation, Turbines, Numerical analysis, Blades, Pressure, Annulus, Cascades (Fluid dynamics), Flow (Dynamics), Computational fluid dynamics, Fourier transforms
Journal Articles

Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring—Part I: Airfoil Design

M. Eric Lyall, Paul I. King, John P. Clark, Rolf Sondergaard
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. August 2014, 136(8): 081005.
Paper No: TURBO-13-1195
DOI: https://doi.org/10.1115/1.4025951
Published Online: January 31, 2014
View Article titled, Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring—Part I: Airfoil Design
Click here to open pdf in another window PDF for Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring—Part I: Airfoil Design
Topics: Airfoils, Design, Pressure
Proceedings Papers

Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring: Part I — Airfoil Design

M. Eric Lyall, Paul I. King, John P. Clark, Rolf Sondergaard
Proc. ASME. GT2013, Volume 6A: Turbomachinery, V06AT36A023, June 3–7, 2013
Paper No: GT2013-95000
DOI: https://doi.org/10.1115/GT2013-95000
View Paper titled, Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring: Part I — Airfoil Design
Click here to open pdf in another window PDF for Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring: Part I — Airfoil Design
Topics: Airfoils, Design, Pressure, Turbines, Cascades (Fluid dynamics)
Proceedings Papers

Comparison of Predictions From Conjugate Heat Transfer Analysis of a Film-Cooled Turbine Vane to Experimental Data

Ron-Ho Ni, William Humber, George Fan, John P. Clark, Richard J. Anthony, Jamie J. Johnson
Proc. ASME. GT2013, Volume 3B: Heat Transfer, V03BT11A013, June 3–7, 2013
Paper No: GT2013-94716
DOI: https://doi.org/10.1115/GT2013-94716
View Paper titled, Comparison of Predictions From Conjugate Heat Transfer Analysis of a Film-Cooled Turbine Vane to Experimental Data
Click here to open pdf in another window PDF for Comparison of Predictions From Conjugate Heat Transfer Analysis of a Film-Cooled Turbine Vane to Experimental Data
Topics: Heat transfer, Turbines, Heat flux, Metals, Temperature, Air Force, Boundary-value problems, Fluids, Gages, Root cause analysis
Proceedings Papers

A Review of the AFRL Turbine Research Facility

Richard J. Anthony, John P. Clark
Proc. ASME. GT2013, Volume 3C: Heat Transfer, V03CT14A010, June 3–7, 2013
Paper No: GT2013-94741
DOI: https://doi.org/10.1115/GT2013-94741
View Paper titled, A Review of the AFRL Turbine Research Facility
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Topics: Turbines, Testing, Engines, Heat transfer, Aerodynamics, Air Force, Airfoils, Computational fluid dynamics, Construction, Design
Proceedings Papers

Modifications and Upgrades to the AFRL Turbine Research Facility

Richard J. Anthony, John P. Clark, John M. Finnegan, Dean Johnson
Proc. ASME. GT2012, Volume 4: Heat Transfer, Parts A and B, 793-804, June 11–15, 2012
Paper No: GT2012-70084
DOI: https://doi.org/10.1115/GT2012-70084
View Paper titled, Modifications and Upgrades to the AFRL Turbine Research Facility
Click here to open pdf in another window PDF for Modifications and Upgrades to the AFRL Turbine Research Facility
Topics: Turbines, Hardware, Computer software, Design, Airfoils, Cooling, Data acquisition, Modeling, Aerodynamics, Air Force
Journal Articles

An Investigation of Reynolds Lapse Rate for Highly Loaded Low Pressure Turbine Airfoils With Forward and Aft Loading

M. Eric Lyall, Paul I. King, Rolf Sondergaard, John P. Clark, Mark W. McQuilling
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. September 2012, 134(5): 051035.
DOI: https://doi.org/10.1115/1.4004826
Published Online: May 24, 2012
View Article titled, An Investigation of Reynolds Lapse Rate for Highly Loaded Low Pressure Turbine Airfoils With Forward and Aft Loading
Click here to open pdf in another window PDF for An Investigation of Reynolds Lapse Rate for Highly Loaded Low Pressure Turbine Airfoils With Forward and Aft Loading
Topics: Airfoils, Pressure, Reynolds number, Suction, Turbulence, Flow (Dynamics), Cascades (Fluid dynamics), Boundary layers, Turbines, Reynolds-averaged Navier–Stokes equations