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Proceedings Papers

Sweeping Jet Film Cooling Over the Suction Surface of HP Turbine NGV With Forward and Reversed Hole Configurations

Hitesh Sharma, Chetankumar S. Mistry, Arnab Roy
Proc. ASME. GT2024, Volume 7: Heat Transfer: Combustors; Heat Transfer: Film Cooling, V007T12A047, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-129582
https://doi.org/10.1115/GT2024-129582
View Paper titled, Sweeping Jet Film Cooling Over the Suction Surface of HP Turbine NGV With Forward and Reversed Hole Configurations
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Topics: Film cooling, Nozzle guide vanes, Suction, Turbines
Proceedings Papers

Non-Axisymmetric Stator Hub Endwall Contouring for Tandem Bladed Axial Compressor Stage

Priyanka S., Chetan S. Mistry, Arnab Roy
Proc. ASME. GTINDIA2023, ASME 2023 Gas Turbine India Conference, V001T02A007, December 7–8, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GTINDIA2023-118437
https://doi.org/10.1115/GTINDIA2023-118437
View Paper titled, Non-Axisymmetric Stator Hub Endwall Contouring for Tandem Bladed Axial Compressor Stage
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Topics: Cascades (Fluid dynamics), Compressors, Optimization, Stators, Flow (Dynamics), Pressure, Blades, Design, Pressure gradient, Axial flow
Journal Articles

Effects of Downstream Vortex Generators on Film Cooling a Flat Plate Fed by Crossflow

Douglas Straub, Justin Weber, Arnab Roy, Chien-Shing Lee, Tom I-P. Shih
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. May 2024, 146(5): 051011.
Paper No: TURBO-23-1244
https://doi.org/10.1115/1.4064316
Published Online: January 16, 2024
View Article titled, Effects of Downstream Vortex Generators on Film Cooling a Flat Plate Fed by Crossflow
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Topics: Computational fluid dynamics, Coolants, Cooling, Film cooling, Vortices, Generators, Heat transfer coefficients, Temperature
Proceedings Papers

Novel Additively-Manufactured and Internally-Cooled Airfoils for Increasing Small Industrial Gas Turbine Efficiency

Matthew Searle, Arnab Roy, Sridharan Ramesh, Timothy Floyd, Forrest E. Ames, Douglas Straub
Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT15A001, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101006
https://doi.org/10.1115/GT2023-101006
View Paper titled, Novel Additively-Manufactured and Internally-Cooled Airfoils for Increasing Small Industrial Gas Turbine Efficiency
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Topics: Additive manufacturing, Airfoils, Combined heat and power, Cooling, Industrial gases, Turbines
Proceedings Papers

Effects of Downstream Vortex Generators on Film Cooling a Flat Plate Fed by Crossflow

Douglas Straub, Justin Weber, Arnab Roy, Chien-Shing Lee, Tom I-P. Shih
Proc. ASME. GT2023, Volume 7A: Heat Transfer — Combustors; Film Cooling, V07AT12A011, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102498
https://doi.org/10.1115/GT2023-102498
View Paper titled, Effects of Downstream Vortex Generators on Film Cooling a Flat Plate Fed by Crossflow
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Topics: Film cooling, Flat plates, Generators, Heat transfer coefficients, Vortices
Proceedings Papers

Performance of Additively Manufactured Internally Cooled Airfoils for Small Industrial Gas Turbines

Doug Straub, Sridharan Ramesh, Matthew Searle, Edward Robey, Tim Floyd, Arnab Roy, Forrest E. Ames
Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT15A028, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83333
https://doi.org/10.1115/GT2022-83333
View Paper titled, Performance of Additively Manufactured Internally Cooled Airfoils for Small Industrial Gas Turbines
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Topics: Additive manufacturing, Airfoils, Cooling, Industrial gases, Turbines
Proceedings Papers

Investigation of Gas Turbine Internal Cooling Using Supercritical CO2 – Effect of Surface Roughness and Channel Aspect Ratio

Arnab Roy, Matthew Searle, Sridharan Ramesh, Douglas Straub
Proc. ASME. GT2022, Volume 9: Supercritical CO2, V009T28A026, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83319
https://doi.org/10.1115/GT2022-83319
View Paper titled, Investigation of Gas Turbine Internal Cooling Using Supercritical CO2 – Effect of Surface Roughness and Channel Aspect Ratio
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Topics: Cooling, Gas turbines, Supercritical carbon dioxide, Surface roughness, Reynolds number, Additive manufacturing, Computational fluid dynamics, Heat transfer, Flow (Dynamics), Fluids
Journal Articles

Investigation of Gas Turbine Internal Cooling Using Supercritical CO 2 —Effect of Surface Roughness and Channel Aspect Ratio

Arnab Roy, Matthew Searle, Sridharan Ramesh, Douglas Straub
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2022, 144(11): 111019.
Paper No: GTP-22-1358
https://doi.org/10.1115/1.4055497
Published Online: September 23, 2022
View Article titled, Investigation of Gas Turbine Internal Cooling Using Supercritical CO 2 —Effect of Surface Roughness and Channel Aspect Ratio
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Topics: Computational fluid dynamics, Cooling, Flow (Dynamics), Heat transfer, Reynolds number, Surface roughness, Friction, Simulation, Gas turbines, Sands
Proceedings Papers

Baseline Airfoil Cooling Designs for a 5-10 MW Combined Heat and Power Turbine Application

Doug Straub, Sridharan Ramesh, Matthew Searle, Arnab Roy, James Black
Proc. ASME. GT2021, Volume 5B: Heat Transfer — General Interest; Internal Air Systems; Internal Cooling, V05BT15A009, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59114
https://doi.org/10.1115/GT2021-59114
View Paper titled, Baseline Airfoil Cooling Designs for a 5-10 MW Combined Heat and Power Turbine Application
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Topics: Airfoils, Combined heat and power, Cooling, Gas turbines, Turbines
Proceedings Papers

Investigating Gas Turbine Internal Cooling Using Supercritical CO 2 at High Reynolds Numbers for Direct Fired Cycle Applications

Matthew Searle, Arnab Roy, James Black, Doug Straub, Sridharan Ramesh
Proc. ASME. GT2021, Volume 10: Supercritical CO2, V010T30A020, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59630
https://doi.org/10.1115/GT2021-59630
View Paper titled, Investigating Gas Turbine Internal Cooling Using Supercritical CO 2 at High Reynolds Numbers for Direct Fired Cycle Applications
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Topics: Cooling, Cycles, Gas turbines, Reynolds number, Supercritical carbon dioxide, Additive manufacturing, Computational fluid dynamics, Heat transfer, Channel flow, Coolants
Journal Articles

Investigating Gas Turbine Internal Cooling Using Supercritical CO 2 at Higher Reynolds Numbers for Direct Fired Cycle Applications

Matthew Searle, Arnab Roy, James Black, Douglas Straub, Sridharan Ramesh
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2022, 144(1): 011007.
Paper No: TURBO-21-1148
https://doi.org/10.1115/1.4052138
Published Online: September 7, 2021
View Article titled, Investigating Gas Turbine Internal Cooling Using Supercritical CO 2 at Higher Reynolds Numbers for Direct Fired Cycle Applications
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Topics: Cooling, Flow (Dynamics), Friction, Gas turbines, Heat transfer, Reynolds number, Surface roughness, Computational fluid dynamics, Supercritical carbon dioxide, Uncertainty
Journal Articles

Measurement of Convective Heat Transfer Coefficients With Supercritical CO 2 Using the Wilson-Plot Technique

Jim Black, Doug Straub, Ed Robey, Joe Yip, Sridharan Ramesh, Arnab Roy, Matthew Searle
Journal: Journal of Energy Resources Technology
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. July 2020, 142(7): 070901.
Paper No: JERT-19-1412
https://doi.org/10.1115/1.4046700
Published Online: April 8, 2020
View Article titled, Measurement of Convective Heat Transfer Coefficients With Supercritical CO 2 Using the Wilson-Plot Technique
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Topics: Convection, Flow (Dynamics), Heat, Heat exchangers, Heat transfer, Heat transfer coefficients, Supercritical carbon dioxide, Temperature, Testing, Thermodynamic power cycles
Journal Articles

Computational Fluid Dynamics Studies on Unstable Oscillatory Direct Contact Condensation of Subsonic Steam Jets in Water Cross-Flow

Jayachandran K. Narayanan, Arnab Roy, Parthasarathi Ghosh
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. May 2020, 142(5): 051601.
Paper No: HT-19-1333
https://doi.org/10.1115/1.4046347
Published Online: March 16, 2020
View Article titled, Computational Fluid Dynamics Studies on Unstable Oscillatory Direct Contact Condensation of Subsonic Steam Jets in Water Cross-Flow
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Topics: Condensation, Cross-flow, Heat transfer coefficients, Jets, Pressure, Steam, Temperature, Vapors, Water, Plumes (Fluid dynamics)
Proceedings Papers

Numerical Analysis of Detonability Assessment in a Natural Gas-Air Fueled Rotating Detonation Engine

Pankaj Saha, Peter Strakey, Donald Ferguson, Arnab Roy
Proc. ASME. IMECE2019, Volume 8: Heat Transfer and Thermal Engineering, V008T09A024, November 11–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2019-11728
https://doi.org/10.1115/IMECE2019-11728
View Paper titled, Numerical Analysis of Detonability Assessment in a Natural Gas-Air Fueled Rotating Detonation Engine
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Topics: Engines, Explosions, Numerical analysis, Waves, Combustion chambers, Pressure, Hydrogen, Natural gas, Combustion, Flow (Dynamics)
Proceedings Papers

Investigating Instabilities in a Rotating Detonation Combustor Operating With Natural Gas-Hydrogen Fuel Blend: Effect of Air Preheat and Annulus Width

Arnab Roy, Clinton Bedick, Donald Ferguson, Todd Sidwell, Peter Strakey
Proc. ASME. GT2019, Volume 4B: Combustion, Fuels, and Emissions, V04BT04A001, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-90938
https://doi.org/10.1115/GT2019-90938
View Paper titled, Investigating Instabilities in a Rotating Detonation Combustor Operating With Natural Gas-Hydrogen Fuel Blend: Effect of Air Preheat and Annulus Width
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Topics: Annulus, Combustion chambers, Explosions, Fuels, Hydrogen, Waves, Temperature, Natural gas, Combustion, Pressure
Journal Articles

Investigating Instabilities in a Rotating Detonation Combustor Operating With Natural Gas–Hydrogen Fuel Blend—Effect of Air Preheat and Annulus Width

Arnab Roy, Clinton R. Bedick, Donald H. Ferguson, Todd Sidwell, Peter A. Strakey
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2019, 141(11): 111017.
Paper No: GTP-19-1325
https://doi.org/10.1115/1.4044980
Published Online: October 18, 2019
View Article titled, Investigating Instabilities in a Rotating Detonation Combustor Operating With Natural Gas–Hydrogen Fuel Blend—Effect of Air Preheat and Annulus Width
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Topics: Annulus, Combustion, Explosions, Natural gas, Pressure, Temperature, Waves, Hydrogen, Combustion chambers, Fuels
Proceedings Papers

Characteristics of a Non-Premixed Rotating Detonation Combustor Using Natural Gas-Hydrogen Blend at Elevated Air-Preheat Temperature and Backpressure

Arnab Roy, Donald Ferguson, Todd Sidwell, Peter Strakey
Proc. ASME. IMECE2018, Volume 8A: Heat Transfer and Thermal Engineering, V08AT10A020, November 9–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2018-88569
https://doi.org/10.1115/IMECE2018-88569
View Paper titled, Characteristics of a Non-Premixed Rotating Detonation Combustor Using Natural Gas-Hydrogen Blend at Elevated Air-Preheat Temperature and Backpressure
Open the PDF for Characteristics of a Non-Premixed Rotating Detonation Combustor Using Natural Gas-Hydrogen Blend at Elevated Air-Preheat Temperature and Backpressure in another window
Topics: Combustion chambers, Explosions, Hydrogen, Temperature, Natural gas, Pressure, Waves, Fuels, Stability, Combustion
Proceedings Papers

CFD Analysis of Direct Contact Condensation (DCC) of Subsonic Steam Jets in a Cross-Flow of Water Using a Two-Fluid Model

Jayachandran K. Narayanan, Arnab Roy, Parthasarathi Ghosh
Proc. ASME. IMECE2018, Volume 8A: Heat Transfer and Thermal Engineering, V08AT10A058, November 9–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2018-87382
https://doi.org/10.1115/IMECE2018-87382
View Paper titled, CFD Analysis of Direct Contact Condensation (DCC) of Subsonic Steam Jets in a Cross-Flow of Water Using a Two-Fluid Model
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Topics: Computational fluid dynamics, Condensation, Cross-flow, Fluids, Jets, Steam, Water, Heat transfer, Oxygen, Vapors
Proceedings Papers

Design Aspects for Large Diameter, Low Speed Axial Flow Fan for Wind Tunnel Application

Shubham Kesharwani, Chetan S. Mistry, Subhransu Roy, Arnab Roy, Kalyan P. Sinhamahapatra
Proc. ASME. GTINDIA2017, Volume 1: Compressors, Fans and Pumps; Turbines; Heat Transfer; Combustion, Fuels and Emissions, V001T01A020, December 7–8, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GTINDIA2017-4880
https://doi.org/10.1115/GTINDIA2017-4880
View Paper titled, Design Aspects for Large Diameter, Low Speed Axial Flow Fan for Wind Tunnel Application
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Topics: Axial flow, Design, Wind tunnels, Blades, Rotors, Noise (Sound), Pressure, Chords (Trusses), Design methodology, Stators
Journal Articles

Heat Transfer Performance of a Transonic Turbine Blade Passage in the Presence of Leakage Flow Through Upstream Slot and Mateface Gap With Endwall Contouring

Arnab Roy, Sakshi Jain, Srinath V. Ekkad, Wing Ng, Andrew S. Lohaus, Michael E. Crawford, Santosh Abraham
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. December 2017, 139(12): 121006.
Paper No: TURBO-17-1101
https://doi.org/10.1115/1.4037909
Published Online: October 3, 2017
View Article titled, Heat Transfer Performance of a Transonic Turbine Blade Passage in the Presence of Leakage Flow Through Upstream Slot and Mateface Gap With Endwall Contouring
Open the PDF for Heat Transfer Performance of a Transonic Turbine Blade Passage in the Presence of Leakage Flow Through Upstream Slot and Mateface Gap With Endwall Contouring in another window
Topics: Heat transfer, Leakage flows, Coolants, Flow (Dynamics)