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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
Paper No: GT2022-83319
DOI: https://doi.org/10.1115/GT2022-83319
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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
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
Paper No: GT2022-83333
DOI: https://doi.org/10.1115/GT2022-83333
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Topics: Additive manufacturing, Airfoils, Cooling, Industrial gases, Turbines
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
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2022, 144(11): 111019.
Paper No: GTP-22-1358
DOI: https://doi.org/10.1115/1.4055497
Published Online: September 23, 2022
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Topics: Computational fluid dynamics, Cooling, Flow (Dynamics), Heat transfer, Reynolds number, Surface roughness, Friction, Simulation, Gas turbines, Sands
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
Paper No: GT2021-59630
DOI: https://doi.org/10.1115/GT2021-59630
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Topics: Cooling, Cycles, Gas turbines, Reynolds number, Supercritical carbon dioxide, Additive manufacturing, Computational fluid dynamics, Heat transfer, Channel flow, Coolants
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
Paper No: GT2021-59114
DOI: https://doi.org/10.1115/GT2021-59114
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Topics: Airfoils, Combined heat and power, Cooling, Gas turbines, Turbines
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
Article Type: Research Papers
J. Turbomach. January 2022, 144(1): 011007.
Paper No: TURBO-21-1148
DOI: https://doi.org/10.1115/1.4052138
Published Online: September 7, 2021
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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
Article Type: Research Papers
J. Energy Resour. Technol. July 2020, 142(7): 070901.
Paper No: JERT-19-1412
DOI: https://doi.org/10.1115/1.4046700
Published Online: April 8, 2020
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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: Journal of Heat Transfer
Article Type: Research-Article
J. Heat Transfer. May 2020, 142(5): 051601.
Paper No: HT-19-1333
DOI: https://doi.org/10.1115/1.4046347
Published Online: March 16, 2020
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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
Paper No: IMECE2019-11728
DOI: https://doi.org/10.1115/IMECE2019-11728
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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
Paper No: GT2019-90938
DOI: https://doi.org/10.1115/GT2019-90938
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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
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2019, 141(11): 111017.
Paper No: GTP-19-1325
DOI: https://doi.org/10.1115/1.4044980
Published Online: October 18, 2019
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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
Paper No: IMECE2018-88569
DOI: https://doi.org/10.1115/IMECE2018-88569
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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
Paper No: IMECE2018-87382
DOI: https://doi.org/10.1115/IMECE2018-87382
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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
Paper No: GTINDIA2017-4880
DOI: https://doi.org/10.1115/GTINDIA2017-4880
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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
Article Type: Research-Article
J. Turbomach. December 2017, 139(12): 121006.
Paper No: TURBO-17-1101
DOI: https://doi.org/10.1115/1.4037909
Published Online: October 3, 2017
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Topics: Heat transfer, Leakage flows, Coolants, Flow (Dynamics)
Journal Articles

Effect of Endwall Contouring on a Transonic Turbine Blade Passage: Heat Transfer Performance

Kapil V. Panchal, Santosh Abraham, Arnab Roy, Srinath V. Ekkad, Wing Ng, Andrew S. Lohaus, Michael E. Crawford
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. January 2017, 139(1): 011009.
Paper No: TURBO-16-1061
DOI: https://doi.org/10.1115/1.4034411
Published Online: September 20, 2016
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Topics: Computational fluid dynamics, Geometry, Heat transfer, Temperature, Mach number, Design, Turbines, Simulation, Turbine blades, Pressure
Journal Articles

Low Reynolds Number Flow Characteristics for Two Side by Side Rotating Cylinders

K. Supradeepan, Arnab Roy
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. October 2015, 137(10): 101204.
Paper No: FE-14-1323
DOI: https://doi.org/10.1115/1.4030486
Published Online: October 1, 2015
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Topics: Circular cylinders, Cylinders, Drag (Fluid dynamics), Flow (Dynamics), Oscillations, Rotation, Vorticity, Reynolds number, Wakes, Boundary-value problems
Proceedings Papers

A Physics Based Reactor Network Model of a Rotating Detonation Engine Combustor

Arnab Roy, Don Ferguson
Proc. ASME. GT2015, Volume 4B: Combustion, Fuels and Emissions, V04BT04A065, June 15–19, 2015
Paper No: GT2015-44055
DOI: https://doi.org/10.1115/GT2015-44055
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Topics: Combustion chambers, Engines, Explosions, Network models, Physics, Computational fluid dynamics, Design, Emissions, Exhaust systems, Thermodynamic processes
Journal Articles

A Novel Transient Technique to Determine Recovery Temperature, Heat Transfer Coefficient, and Film Cooling Effectiveness Simultaneously in a Transonic Turbine Cascade

Song Xue, Arnab Roy, Wing F. Ng, Srinath V. Ekkad
Journal: Journal of Thermal Science and Engineering Applications
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. March 2015, 7(1): 011016.
Paper No: TSEA-14-1112
DOI: https://doi.org/10.1115/1.4029098
Published Online: March 1, 2015
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Topics: Film cooling, Heat transfer, Temperature, Transients (Dynamics), Flow (Dynamics)
Proceedings Papers

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

Arnab Roy, Sakshi Jain, Srinath V. Ekkad, Wing F. Ng, Andrew S. Lohaus, Michael E. Crawford
Proc. ASME. GT2014, Volume 5B: Heat Transfer, V05BT13A048, June 16–20, 2014
Paper No: GT2014-26476
DOI: https://doi.org/10.1115/GT2014-26476
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Topics: Heat transfer, Leakage flows, Turbine blades, Coolants, Flow (Dynamics), Geometry, Temperature, Adiabatic cooling, Airfoils, Cascades (Fluid dynamics)