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James L. Rutledge
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Journal Articles

Superposition of Overall Cooling Effectiveness on a Turbine Blade Leading Edge

Bailey W. Hopkins, James L. Rutledge
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2025, 147(10): 101001.
Paper No: TURBO-24-1173
https://doi.org/10.1115/1.4067886
Published Online: February 28, 2025
View Article titled, Superposition of Overall Cooling Effectiveness on a Turbine Blade Leading Edge
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Topics: Coolants, Cooling, Temperature, Film cooling
Journal Articles

Biot Number Error in Low-Temperature Inconel Overall Effectiveness Experiments

Bailey W. Hopkins, Jacob A. Hughes, Carol E. Bryant, James L. Rutledge
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2025, 147(9): 091006.
Paper No: TURBO-24-1339
https://doi.org/10.1115/1.4067460
Published Online: February 6, 2025
View Article titled, Biot Number Error in Low-Temperature Inconel Overall Effectiveness Experiments
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Topics: Coolants, Engines, Errors, Low temperature, Temperature, Thermal conductivity, Turbine components, Film cooling, Cooling, Turbochargers
Journal Articles

Computational Investigation of the Operating Mechanism of the Ranque–Hilsch Vortex Tube

Matthew N. Fuqua, James L. Rutledge
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. January 2025, 17(1): 011011.
Paper No: TSEA-24-1164
https://doi.org/10.1115/1.4066984
Published Online: November 14, 2024
View Article titled, Computational Investigation of the Operating Mechanism of the Ranque–Hilsch Vortex Tube
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Topics: Flow (Dynamics), Separation (Technology), Temperature, Vortices, Heat transfer, Energy transformation, Computational fluid dynamics
Proceedings Papers

Superposition of Overall Cooling Effectiveness on a Turbine Blade Leading Edge

Bailey W. Hopkins, James L. Rutledge
Proc. ASME. GT2024, Volume 7: Heat Transfer: Combustors; Heat Transfer: Film Cooling, V007T12A001, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-121339
https://doi.org/10.1115/GT2024-121339
View Paper titled, Superposition of Overall Cooling Effectiveness on a Turbine Blade Leading Edge
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Topics: Cooling, Turbine blades, Film cooling, Design, Turbines, Airfoils, Engines, Pressure gradient
Proceedings Papers

Biot Number Error in Low Temperature Inconel Overall Effectiveness Experiments

Bailey W. Hopkins, Jacob A. Hughes, Carol E. Bryant, James L. Rutledge
Proc. ASME. GT2024, Volume 7: Heat Transfer: Combustors; Heat Transfer: Film Cooling, V007T12A018, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-124338
https://doi.org/10.1115/GT2024-124338
View Paper titled, Biot Number Error in Low Temperature Inconel Overall Effectiveness Experiments
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Topics: Errors, Low temperature, Engines, Temperature, Thermal conductivity, Nickel alloys, Turbine components, Nickel, Superalloys, Testing
Journal Articles

A Superposition Technique for Predicting Overall Effectiveness With Multiple Sources of Individually Characterized Internal and External Coolant Flows

Matthew N. Fuqua, James L. Rutledge
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2024, 146(12): 121008.
Paper No: TURBO-23-1115
https://doi.org/10.1115/1.4065746
Published Online: July 23, 2024
View Article titled, A Superposition Technique for Predicting Overall Effectiveness With Multiple Sources of Individually Characterized Internal and External Coolant Flows
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Topics: Coolants, Temperature, Cooling, Film cooling, Flow (Dynamics)
Journal Articles

Analytical Solution for Transient Thermal Behavior of Two Semisolids With Contact Resistance and Interfacial Heat Generation

William P. Baker, James L. Rutledge
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Technical Briefs
J. Heat Mass Transfer. November 2024, 146(11): 114501.
Paper No: HT-24-1097
https://doi.org/10.1115/1.4065692
Published Online: July 16, 2024
View Article titled, Analytical Solution for Transient Thermal Behavior of Two Semisolids With Contact Resistance and Interfacial Heat Generation
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Topics: Contact resistance, Heat, Temperature
Journal Articles

An Experimental and Computational Investigation of Ranque–Hilsch Vortex Tube Heat Transfer Characteristics

Matthew N. Fuqua, James L. Rutledge
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. February 2024, 16(2): 021001.
Paper No: TSEA-23-1081
https://doi.org/10.1115/1.4063826
Published Online: November 16, 2023
View Article titled, An Experimental and Computational Investigation of Ranque–Hilsch Vortex Tube Heat Transfer Characteristics
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Topics: Flow (Dynamics), Heat, Heat transfer, Temperature, Vortices, Nozzles, Separation (Technology)
Journal Articles

Mass-Heat Coupling in Film Cooling Experiments—The Influence of Temperature and Turbulence on the Dufour Effect

Connor J. Wiese, James L. Rutledge
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2023, 145(12): 121003.
Paper No: TURBO-23-1142
https://doi.org/10.1115/1.4063411
Published Online: October 19, 2023
View Article titled, Mass-Heat Coupling in Film Cooling Experiments—The Influence of Temperature and Turbulence on the Dufour Effect
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Topics: Coolants, Film cooling, Free stream turbulence, Helium, Separation (Technology), Temperature, Cooling, Gases, Turbulence, Momentum
Journal Articles

Scaling Overall Effectiveness in Low-Temperature Experiments

Carol E. Bryant, James L. Rutledge
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2023, 145(12): 121004.
Paper No: TURBO-23-1146
https://doi.org/10.1115/1.4063412
Published Online: October 19, 2023
View Article titled, Scaling Overall Effectiveness in Low-Temperature Experiments
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Topics: Carbon dioxide, Coolants, Engines, Temperature, Low temperature, Film cooling, Cooling, Fluids
Proceedings Papers

A Superposition Technique for Predicting Overall Effectiveness With Multiple Sources of Individually Characterized Internal and External Coolant Flows

Matthew N. Fuqua, James L. Rutledge
Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT13A009, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102233
https://doi.org/10.1115/GT2023-102233
View Paper titled, A Superposition Technique for Predicting Overall Effectiveness With Multiple Sources of Individually Characterized Internal and External Coolant Flows
Open the PDF for A Superposition Technique for Predicting Overall Effectiveness With Multiple Sources of Individually Characterized Internal and External Coolant Flows in another window
Topics: Coolants, Flow (Dynamics), Cooling, Film cooling, Temperature, Turbine components, Wall temperature, Design, Gas turbines, High temperature
Proceedings Papers

Scaling Overall Effectiveness in Low Temperature Experiments

Carol E. Bryant, James L. Rutledge
Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT13A008, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102228
https://doi.org/10.1115/GT2023-102228
View Paper titled, Scaling Overall Effectiveness in Low Temperature Experiments
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Topics: Low temperature, Coolants, Engines, Computational fluid dynamics, Carbon dioxide, Cooling, Design, Fluids, Gases, Heat transfer coefficients
Proceedings Papers

Mass-Heat Coupling in Film Cooling Experiments — The Influence of Temperature and Turbulence on the Dufour Effect

Connor J. Wiese, James L. Rutledge
Proc. ASME. GT2023, Volume 7A: Heat Transfer — Combustors; Film Cooling, V07AT12A006, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101638
https://doi.org/10.1115/GT2023-101638
View Paper titled, Mass-Heat Coupling in Film Cooling Experiments — The Influence of Temperature and Turbulence on the Dufour Effect
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Topics: Film cooling, Heat, Temperature, Turbulence, Coolants, Helium, Carbon dioxide, Cooling, Free stream turbulence, Gases
Journal Articles

Design Impacts on Ram Air Vane Cooling in an Ultra-Compact Combustor

Kevin J. DeMarco, Marc D. Polanka, Brian T. Bohan, James L. Rutledge
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. October 2023, 15(10): 101005.
Paper No: TSEA-22-1539
https://doi.org/10.1115/1.4062703
Published Online: June 26, 2023
View Article titled, Design Impacts on Ram Air Vane Cooling in an Ultra-Compact Combustor
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Topics: Combustion chambers, Cooling, Design, Flow (Dynamics), Pressure, Temperature, Film cooling, Coolants, Chords (Trusses)
Journal Articles

Temperature Dependent Property Considerations for Biot Number Matching With Composite Materials

Carol E. Bryant, James L. Rutledge
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2023, 145(4): 041010.
Paper No: TURBO-21-1261
https://doi.org/10.1115/1.4055927
Published Online: November 7, 2022
View Article titled, Temperature Dependent Property Considerations for Biot Number Matching With Composite Materials
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Topics: Ceramic matrix composites, Composite materials, Engines, Errors, Low temperature, Temperature, Thermal conductivity, Cooling, Anisotropy, Turbine components
Proceedings Papers

Flow Scaling Considerations for Internal Coolant Warming

Connor J. Wiese, Carol E. Bryant, James L. Rutledge
Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT15A010, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81510
https://doi.org/10.1115/GT2022-81510
View Paper titled, Flow Scaling Considerations for Internal Coolant Warming
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Topics: Coolants, Flow (Dynamics), Engines, Fluids, Gases, Temperature distribution, Turbine components
Proceedings Papers

A Resistive Model to Characterize Overall Effectiveness Influenced by Multiple Coolant Temperatures

James L. Rutledge, Matthew N. Fuqua, Marc D. Polanka, William P. Baker
Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A017, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81816
https://doi.org/10.1115/GT2022-81816
View Paper titled, A Resistive Model to Characterize Overall Effectiveness Influenced by Multiple Coolant Temperatures
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Topics: Coolants, Temperature, Computational fluid dynamics, Engineering simulation, Flow (Dynamics), Simulation, Turbines
Proceedings Papers

Scaling Flat Plate Overall Effectiveness Measurements

Luke J. McNamara, Jacob P. Fischer, Marta Kernan, James L. Rutledge
Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A018, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81826
https://doi.org/10.1115/GT2022-81826
View Paper titled, Scaling Flat Plate Overall Effectiveness Measurements
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Topics: Flat plates, Coolants, Engines, Flow (Dynamics), Thermal conductivity, Turbine components, Cooling, Design, Gases, Low temperature
Proceedings Papers

Theoretical Considerations for Scaling Convection in Overall Effectiveness Experiments

Carol E. Bryant, James L. Rutledge
Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A015, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81508
https://doi.org/10.1115/GT2022-81508
View Paper titled, Theoretical Considerations for Scaling Convection in Overall Effectiveness Experiments
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Topics: Computational fluid dynamics, Convection, Coolants, Density, Engineering simulation, Engines, Flow (Dynamics), Fluids, Gases, Heat transfer coefficients
Journal Articles

Scaling Flat Plate Overall Effectiveness Measurements

Luke J. McNamara, Jacob P. Fischer, Marta E. Kernan, James L. Rutledge
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2023, 145(3): 031003.
Paper No: TURBO-22-1212
https://doi.org/10.1115/1.4055614
Published Online: October 17, 2022
View Article titled, Scaling Flat Plate Overall Effectiveness Measurements
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Topics: Coolants, Flat plates, Gases, Thermal conductivity, Cooling, Temperature, Carbon dioxide, Reynolds number, Engines, Specific heat