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Ronald S. Bunker
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Proceedings Papers

Effect of Squealer Geometry Arrangement on Gas Turbine Blade Tip Heat Transfer

Gm Salam Azad, Je-Chin Han, Ronald S. Bunker, C. Pang Lee
Proc. ASME. IMECE2001, Heat Transfer: Volume 5 — Computational, Aerospace and Environmental Heat Transfer, 297-305, November 11–16, 2001
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2001/HTD-24314
https://doi.org/10.1115/IMECE2001/HTD-24314
View Paper titled, Effect of Squealer Geometry Arrangement on Gas Turbine Blade Tip Heat Transfer
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Topics: Blades, Gas turbines, Geometry, Heat transfer, Pressure, Suction, Heat transfer coefficients, Cascades (Fluid dynamics), Chords (Trusses), Flow (Dynamics)
Proceedings Papers

Evolution of Turbine Cooling

Ronald S. Bunker
Proc. ASME. GT2017, Volume 1: Aircraft Engine; Fans and Blowers; Marine; Honors and Awards, V001T51A001, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63205
https://doi.org/10.1115/GT2017-63205
View Paper titled, Evolution of Turbine Cooling
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Topics: Cooling, Turbines, Design, Manufacturing, Coolants, Engines, Innovation, Additive manufacturing, Failure mechanisms, Film cooling
Journal Articles

Publishing in the Journal of Turbomachinery: Keeping Quality High

Ronald S. Bunker
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Editorial
J. Turbomach. March 2015, 137(3): 030201.
Paper No: TURBO-14-1313
https://doi.org/10.1115/1.4029364
Published Online: March 1, 2015
View Article titled, Publishing in the Journal of Turbomachinery: Keeping Quality High
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Topics: Turbomachinery
Proceedings Papers

Separate and Combined Effects of Surface Roughness and Turbulence Intensity on Vane Heat Transfer

Ronald S. Bunker
Proc. ASME. GT1997, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T09A022, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-135
https://doi.org/10.1115/97-GT-135
View Paper titled, Separate and Combined Effects of Surface Roughness and Turbulence Intensity on Vane Heat Transfer
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Topics: Heat transfer, Surface roughness, Turbulence, Airfoils, Reynolds number, Pressure, Cascades (Fluid dynamics), Chords (Trusses), Heat flux, Industrial research
Proceedings Papers

Jet Mixing in a Slot

Ting Wang, Sekhar Chintalapati, Ronald S. Bunker, Ching Pang Lee
Proc. ASME. GT1998, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A007, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-056
https://doi.org/10.1115/98-GT-056
View Paper titled, Jet Mixing in a Slot
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Topics: Cooling, Flow (Dynamics), Gas turbines, High pressure (Physics), Jets, Pressure, Shear (Mechanics)
Proceedings Papers

Heat Transfer and Flow on the First Stage Blade Tip of a Power Generation Gas Turbine: Part 1 — Experimental Results

Ronald S. Bunker, Jeremy C. Bailey, Ali A. Ameri
Proc. ASME. GT1999, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A049, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-169
https://doi.org/10.1115/99-GT-169
View Paper titled, Heat Transfer and Flow on the First Stage Blade Tip of a Power Generation Gas Turbine: Part 1 — Experimental Results
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Topics: Blades, Energy generation, Flow (Dynamics), Gas turbines, Heat transfer, Airfoils, Cascades (Fluid dynamics), Pressure, Heat transfer coefficients, Mach number
Journal Articles

The Optimal Distribution of Pin Fins for Blade Tip Cap Underside Cooling

Gustavo A. Ledezma, Ronald S. Bunker
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. January 2015, 137(1): 011002.
Paper No: TURBO-14-1078
https://doi.org/10.1115/1.4028290
Published Online: September 4, 2014
View Article titled, The Optimal Distribution of Pin Fins for Blade Tip Cap Underside Cooling
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Topics: Blades, Cooling, Fins, Flow (Dynamics), Heat transfer, Optimization, Turbulence, Computational fluid dynamics, Pressure drop, Computer simulation
Proceedings Papers

Flow and Heat Transfer of Confined Impingement Jets Cooling

Ting Wang, Mingjie Lin, Ronald S. Bunker
Proc. ASME. GT2000, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A031, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0223
https://doi.org/10.1115/2000-GT-0223
View Paper titled, Flow and Heat Transfer of Confined Impingement Jets Cooling
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Topics: Cooling, Flow (Dynamics), Heat transfer, Jets, Heat transfer coefficients, Reynolds number, Cavities, Convection, Cross-flow, Liquid crystals
Proceedings Papers

Heat Transfer Measurements and Predictions on a Power Generation Gas Turbine Blade

Paul W. Giel, Ronald S. Bunker, G. James Van Fossen, Robert J. Boyle
Proc. ASME. GT2000, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A017, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0209
https://doi.org/10.1115/2000-GT-0209
View Paper titled, Heat Transfer Measurements and Predictions on a Power Generation Gas Turbine Blade
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Topics: Blades, Energy generation, Gas turbines, Heat transfer, Design, Reynolds number, Turbulence, Airfoils, Boundary layers, Cascades (Fluid dynamics)
Proceedings Papers

Effect of Partial Coating Blockage on Film Cooling Effectiveness

Ronald S. Bunker
Proc. ASME. GT2000, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A051, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0244
https://doi.org/10.1115/2000-GT-0244
View Paper titled, Effect of Partial Coating Blockage on Film Cooling Effectiveness
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Topics: Coatings, Film cooling, Turbines, Airfoils, Coolants, Cross section (Physics), Databases, Diffusers, Flat plates, Flow (Dynamics)
Proceedings Papers

Augmentation of Stagnation Region Heat Transfer due to Turbulence From a DLN Can Combustor

G. James Van Fossen, Ronald S. Bunker
Proc. ASME. GT2000, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A023, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0215
https://doi.org/10.1115/2000-GT-0215
View Paper titled, Augmentation of Stagnation Region Heat Transfer due to Turbulence From a DLN Can Combustor
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Topics: Combustion chambers, Heat transfer, Turbulence, Flow (Dynamics), Fuels, Wire, Air flow, Aluminum, Flat plates, Heat transfer coefficients
Proceedings Papers

Film Cooling Discharge Coefficient Measurments in a Turbulated Passage With Internal Cross Flow

Ronald S. Bunker, Jeremy C. Bailey
Proc. ASME. GT2001, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A021, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0135
https://doi.org/10.1115/2001-GT-0135
View Paper titled, Film Cooling Discharge Coefficient Measurments in a Turbulated Passage With Internal Cross Flow
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Topics: Cross-flow, Discharge coefficient, Film cooling, Flow (Dynamics), Cooling, Blades, Gas turbines, Geometry, Pressure
Proceedings Papers

Effect of Squealer Cavity Depth and Oxidation on Turbine Blade Tip Heat Transfer

Ronald S. Bunker, Jeremy C. Bailey
Proc. ASME. GT2001, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A038, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0155
https://doi.org/10.1115/2001-GT-0155
View Paper titled, Effect of Squealer Cavity Depth and Oxidation on Turbine Blade Tip Heat Transfer
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Topics: Cavities, Heat transfer, Oxidation, Turbine blades, Airfoils, Clearances (Engineering), Blades, Cascades (Fluid dynamics), Heat transfer coefficients, Mach number
Proceedings Papers

Gas Turbine Cooling: Moving From Macro to Micro Cooling

Ronald S. Bunker
Proc. ASME. GT2013, Volume 3C: Heat Transfer, V03CT14A002, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94277
https://doi.org/10.1115/GT2013-94277
View Paper titled, Gas Turbine Cooling: Moving From Macro to Micro Cooling
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Topics: Cooling, Gas turbines, Turbines, Airfoils, Flow (Dynamics), Durability, Dust, Film cooling, Fluids, High pressure (Physics)
Proceedings Papers

The Optimal Distribution of Pin Fins for Blade Tip Cap Underside Cooling

Gustavo A. Ledezma, Ronald S. Bunker
Proc. ASME. GT2013, Volume 3A: Heat Transfer, V03AT12A005, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94172
https://doi.org/10.1115/GT2013-94172
View Paper titled, The Optimal Distribution of Pin Fins for Blade Tip Cap Underside Cooling
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Topics: Blades, Cooling, Fins, Boundary-value problems, Computer simulation, Flow (Dynamics), Fluid dynamics, Heat, Heat transfer, High pressure (Physics)
Journal Articles

The Optimal Distribution of Chordwise Rib Fin Arrays for Blade Tip Cap Underside Cooling

Gustavo A. Ledezma, Ronald S. Bunker
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. January 2014, 136(1): 011007.
Paper No: TURBO-12-1100
https://doi.org/10.1115/1.4024072
Published Online: September 20, 2013
View Article titled, The Optimal Distribution of Chordwise Rib Fin Arrays for Blade Tip Cap Underside Cooling
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Topics: Blades, Cooling, Fins, Flow (Dynamics), Heat transfer, Optimization, Pressure drop, Turbulence, Temperature, Thermal conductivity
Proceedings Papers

The Optimal Distribution of Chordwise Rib Fin Arrays for Blade Tip Cap Underside Cooling

Gustavo A. Ledezma, Ronald S. Bunker
Proc. ASME. GT2012, Volume 4: Heat Transfer, Parts A and B, 163-171, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68432
https://doi.org/10.1115/GT2012-68432
View Paper titled, The Optimal Distribution of Chordwise Rib Fin Arrays for Blade Tip Cap Underside Cooling
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Topics: Blades, Cooling, Heat transfer, Fins, Design, Fluids, Optimization, Pins (Engineering), Thermal conductivity, Turbine blades
Proceedings Papers

Investigation of Augmented Angel Wing Sealing Through the Use of Surface Concavity Arrays

Ronald S. Bunker, Nuo Sheng
Proc. ASME. GT2010, Volume 4: Heat Transfer, Parts A and B, 1091-1101, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22775
https://doi.org/10.1115/GT2010-22775
View Paper titled, Investigation of Augmented Angel Wing Sealing Through the Use of Surface Concavity Arrays
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Topics: Sealing (Process), Wings, Stators, Rotors, Flow (Dynamics), Disks, Surface finishing, Cavities, Clearances (Engineering), Drag (Fluid dynamics)
Journal Articles

Heat Transfer Augmentation Downstream of Rows of Various Dimple Geometries on the Suction Side of a Gas Turbine Airfoil

Jason E. Dees, David G. Bogard, Ronald S. Bunker
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2010, 132(3): 031010.
https://doi.org/10.1115/1.3149284
Published Online: March 25, 2010
View Article titled, Heat Transfer Augmentation Downstream of Rows of Various Dimple Geometries on the Suction Side of a Gas Turbine Airfoil
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Topics: Boundary layer turbulence, Boundary layers, Film cooling, Flow (Dynamics), Gas turbines, Heat transfer, Heat transfer coefficients, Shapes, Suction, Turbulence
Proceedings Papers

Trench Film Cooling: Effect of Trench Downstream Edge and Hole Spacing

Yiping Lu, Srinath V. Ekkad, Ronald S. Bunker
Proc. ASME. GT2008, Volume 4: Heat Transfer, Parts A and B, 563-569, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50606
https://doi.org/10.1115/GT2008-50606
View Paper titled, Trench Film Cooling: Effect of Trench Downstream Edge and Hole Spacing
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Topics: Film cooling, Coolants, Heat transfer coefficients, Cooling, Flow (Dynamics), Reynolds number, Thermography, Transients (Dynamics)