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Journal Articles

Effect of Temperature on Microparticle Rebound Characteristics at Constant Impact Velocity—Part I

J. M. Delimont, M. K. Murdock, W. F. Ng, S. V. Ekkad
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2015, 137(11): 112603.
Paper No: GTP-15-1021
https://doi.org/10.1115/1.4030312
Published Online: November 1, 2015
View Article titled, Effect of Temperature on Microparticle Rebound Characteristics at Constant Impact Velocity—Part I
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Topics: Particulate matter, Temperature, Sands
Journal Articles

Effect of Temperature on Microparticle Rebound Characteristics at Constant Impact Velocity—Part II

J. M. Delimont, M. K. Murdock, W. F. Ng, S. V. Ekkad
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2015, 137(11): 112604.
Paper No: GTP-15-1022
https://doi.org/10.1115/1.4030313
Published Online: November 1, 2015
View Article titled, Effect of Temperature on Microparticle Rebound Characteristics at Constant Impact Velocity—Part II
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Topics: Particulate matter, Temperature, Sands
Proceedings Papers

Experimental and Computational Analysis of Film Cooling Hole Performance on a High Temperature Test Rig

S. Ramesh, S. V. Ekkad, D. L. Straub, S. A. Lawson, M. A. Alvin
Proc. ASME. IMECE2014, Volume 8B: Heat Transfer and Thermal Engineering, V08BT10A007, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-38735
https://doi.org/10.1115/IMECE2014-38735
View Paper titled, Experimental and Computational Analysis of Film Cooling Hole Performance on a High Temperature Test Rig
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Topics: Film cooling, High temperature, Temperature, Coolants, Cooling, Engines, Metals, Alloys, Computational fluid dynamics, Computer simulation
Proceedings Papers

Direct-Coupling Simulation of Thermal-Hydraulic and Stress Analysis in a Cross-Wave Primary Surface Heat Exchanger

J. Zhang, T. Ma, M. Zeng, S. V. Ekkad, Q. W. Wang
Proc. ASME. IMECE2014, Volume 8A: Heat Transfer and Thermal Engineering, V08AT10A050, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-37325
https://doi.org/10.1115/IMECE2014-37325
View Paper titled, Direct-Coupling Simulation of Thermal-Hydraulic and Stress Analysis in a Cross-Wave Primary Surface Heat Exchanger
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Topics: Heat exchangers, Simulation, Stress analysis (Engineering), Waves, Stress, Computational fluid dynamics, Computer-aided engineering, Fluid dynamics, Temperature, Displacement
Proceedings Papers

Effect of Near Melting Temperatures on Microparticle Sand Rebound Characteristics at Constant Impact Velocity

J. M. Delimont, M. K. Murdock, W. F. Ng, S. V. Ekkad
Proc. ASME. GT2014, Volume 1A: Aircraft Engine; Fans and Blowers, V01AT01A012, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25686
https://doi.org/10.1115/GT2014-25686
View Paper titled, Effect of Near Melting Temperatures on Microparticle Sand Rebound Characteristics at Constant Impact Velocity
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Topics: Melting, Microparticles, Sands, Temperature, Particulate matter, Dust, Engines, Gas turbines, Glass transition, Microscopes
Proceedings Papers

Effect of Temperature on Microparticle Rebound Characteristics at Constant Impact Velocity

J. M. Delimont, M. K. Murdock, W. F. Ng, S. V. Ekkad
Proc. ASME. GT2014, Volume 1A: Aircraft Engine; Fans and Blowers, V01AT01A013, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25687
https://doi.org/10.1115/GT2014-25687
View Paper titled, Effect of Temperature on Microparticle Rebound Characteristics at Constant Impact Velocity
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Topics: Microparticles, Temperature, Particulate matter, Engines, Flow (Dynamics), Gas turbines, Stainless steel, Dust, Erosion, Particle collisions
Proceedings Papers

Comparison of Data Processing Techniques for Convective Heat Transfer Measurements in a Transient Transonic Hot Wind Tunnel

S. Xue, A. Roy, W. F. Ng, S. V. Ekkad
Proc. ASME. GTINDIA2013, ASME 2013 Gas Turbine India Conference, V001T04A011, December 5–6, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GTINDIA2013-3733
https://doi.org/10.1115/GTINDIA2013-3733
View Paper titled, Comparison of Data Processing Techniques for Convective Heat Transfer Measurements in a Transient Transonic Hot Wind Tunnel
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Topics: Convection, Transients (Dynamics), Wind tunnels, Curve fitting, Errors
Proceedings Papers

Study of Microparticle Rebound Characteristics Under High Temperature Conditions

C. J. Reagle, J. M. Delimont, W. F. Ng, S. V. Ekkad
Proc. ASME. GT2013, Volume 2: Aircraft Engine; Coal, Biomass and Alternative Fuels; Cycle Innovations, V002T03A011, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95083
https://doi.org/10.1115/GT2013-95083
View Paper titled, Study of Microparticle Rebound Characteristics Under High Temperature Conditions
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Topics: High temperature, Microparticles, Temperature, Flow (Dynamics), Gas turbines, Particulate matter, Dust, Energy transformation, Heating, Operating temperature
Journal Articles

Study of Microparticle Rebound Characteristics Under High Temperature Conditions

C. J. Reagle, J. M. Delimont, W. F. Ng, S. V. Ekkad
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2014, 136(1): 011501.
Paper No: GTP-13-1195
https://doi.org/10.1115/1.4025346
Published Online: October 21, 2013
View Article titled, Study of Microparticle Rebound Characteristics Under High Temperature Conditions
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Topics: Microparticles, Particulate matter, Temperature, Flow (Dynamics), High temperature, Sands, Instrumentation
Proceedings Papers

A Novel Optical Technique for Measuring the Coefficient of Restitution of Microparticle Impacts in a Forced Flowfield

C. J. Reagle, J. M. Delimont, W. F. Ng, S. V. Ekkad, V. P. Rajendran
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 1-9, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68252
https://doi.org/10.1115/GT2012-68252
View Paper titled, A Novel Optical Technique for Measuring the Coefficient of Restitution of Microparticle Impacts in a Forced Flowfield
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Topics: Microparticles, Particulate matter, Sands, Temperature, Dust, Engines, Erosion, Gas turbines, Glass beads, Numerical analysis
Journal Articles

Novel Jet Impingement Cooling Geometry for Combustor Liner Backside Cooling

E. I. Esposito, S. V. Ekkad, Yong Kim, Partha Dutta
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. June 2009, 1(2): 021001.
https://doi.org/10.1115/1.3202799
Published Online: August 20, 2009
View Article titled, Novel Jet Impingement Cooling Geometry for Combustor Liner Backside Cooling
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Topics: Combustion chambers, Cooling, Design, Geometry, Heat transfer, Impingement cooling, Jets, Liquid crystals, Reynolds number, Flow (Dynamics)
Proceedings Papers

Comparing Extended Port and Corrugated Wall Jet Impingement Geometry for Combustor Liner Backside Cooling

E. I. Esposito, S. V. Ekkad, Yong Kim, Partha Dutta
Proc. ASME. GT2007, Volume 4: Turbo Expo 2007, Parts A and B, 1347-1354, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27390
https://doi.org/10.1115/GT2007-27390
View Paper titled, Comparing Extended Port and Corrugated Wall Jet Impingement Geometry for Combustor Liner Backside Cooling
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Topics: Combustion chambers, Cooling, Geometry, Reynolds number, Jets, Heat transfer, Coolants, Design, Gas turbines, Gates (Closures)
Proceedings Papers

The Effects of Feeding Configurations to Water Flooding and General Performance of a Proton Exchange Membrane Fuel Cell

A. B. Mahmud Hasan, S. M. Guo, S. V. Ekkad
Proc. ASME. IMECE2005, Advanced Energy Systems, 429-435, November 5–11, 2005
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2005-81268
https://doi.org/10.1115/IMECE2005-81268
View Paper titled, The Effects of Feeding Configurations to Water Flooding and General Performance of a Proton Exchange Membrane Fuel Cell
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Topics: Floods, Proton exchange membrane fuel cells, Water, Anodes, Current density, Power density, Density, Flow (Dynamics), Fuels, Plates (structures)
Journal Articles

Influence of Crossflow-Induced Swirl and Impingement on Heat Transfer in an Internal Coolant Passage of a Turbine Airfoil

S. V. Ekkad, Assistant Professor, Assoc. Mem. ASME, G. Pamula, Graduate Student, Mem. ASME, S. Acharya, L. R. Daniel Professor, Fellow ASME
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Technical Papers
J. Heat Mass Transfer. August 2000, 122(3): 587–597.
https://doi.org/10.1115/1.1289020
Published Online: April 12, 2000
View Article titled, Influence of Crossflow-Induced Swirl and Impingement on Heat Transfer in an Internal Coolant Passage of a Turbine Airfoil
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Topics: Flow (Dynamics), Heat transfer, Reynolds number, Coolants, Pressure drop, Turbines
Journal Articles

Effect of Unsteady Wake With Trailing Edge Coolant Ejection on Film Cooling Performance for a Gas Turbine Blade

H. Du, S. V. Ekkad, J.-C. Han
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 1999, 121(3): 448–455.
https://doi.org/10.1115/1.2841337
Published Online: July 1, 1999
View Article titled, Effect of Unsteady Wake With Trailing Edge Coolant Ejection on Film Cooling Performance for a Gas Turbine Blade
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Topics: Blades, Coolants, Film cooling, Gas turbines, Wakes, Heat transfer coefficients, Generators, Boundary layers, Cascades (Fluid dynamics), Heat transfer
Journal Articles

Detailed Film Cooling Measurements on a Cylindrical Leading Edge Model: Effect of Free-Stream Turbulence and Coolant Density

S. V. Ekkad, J. C. Han, H. Du
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 1998, 120(4): 799–807.
https://doi.org/10.1115/1.2841792
Published Online: October 1, 1998
View Article titled, Detailed Film Cooling Measurements on a Cylindrical Leading Edge Model: Effect of Free-Stream Turbulence and Coolant Density
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Topics: Coolants, Density, Film cooling, Turbulence, Carbon dioxide, Cylinders, Heat transfer coefficients, Liquid crystals, Transients (Dynamics), Reynolds number
Journal Articles

Effect of Unsteady Wake on Detailed Heat Transfer Coefficient and Film Effectiveness Distributions for a Gas Turbine Blade

H. Du, J. C. Han, S. V. Ekkad
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 1998, 120(4): 808–817.
https://doi.org/10.1115/1.2841793
Published Online: October 1, 1998
View Article titled, Effect of Unsteady Wake on Detailed Heat Transfer Coefficient and Film Effectiveness Distributions for a Gas Turbine Blade
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Topics: Blades, Gas turbines, Heat transfer coefficients, Wakes, Coolants, Film cooling, Carbon dioxide, Density, Cascades (Fluid dynamics), Suction
Journal Articles

Film Effectiveness Over a Flat Surface With Air and CO 2 Injection Through Compound Angle Holes Using a Transient Liquid Crystal Image Method

S. V. Ekkad, D. Zapata, J. C. Han
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 1997, 119(3): 587–593.
https://doi.org/10.1115/1.2841162
Published Online: July 1, 1997
View Article titled, Film Effectiveness Over a Flat Surface With Air and CO 2 Injection Through Compound Angle Holes Using a Transient Liquid Crystal Image Method
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Topics: Liquid crystals, Tertiary petroleum recovery, Transients (Dynamics), Coolants, Density, Carbon dioxide, Film cooling, Gas turbines, Heat transfer coefficients, Turbulence
Journal Articles

Combined Effect of Grid Turbulence and Unsteady Wake on Film Effectiveness and Heat Transfer Coefficient of a Gas Turbine Blade With Air and CO 2 Film Injection

S. V. Ekkad, A. B. Mehendale, J. C. Han, C. P. Lee
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 1997, 119(3): 594–600.
https://doi.org/10.1115/1.2841163
Published Online: July 1, 1997
View Article titled, Combined Effect of Grid Turbulence and Unsteady Wake on Film Effectiveness and Heat Transfer Coefficient of a Gas Turbine Blade With Air and CO 2 Film Injection
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Topics: Blades, Carbon dioxide, Gas turbines, Heat transfer coefficients, Turbulence, Wakes, Cascades (Fluid dynamics), Chords (Trusses), Density, Pressure
Journal Articles

Heat Transfer Coefficients Over a Flat Surface With Air and CO 2 Injection Through Compound Angle Holes Using a Transient Liquid Crystal Image Method

S. V. Ekkad, D. Zapata, J. C. Han
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 1997, 119(3): 580–586.
https://doi.org/10.1115/1.2841161
Published Online: July 1, 1997
View Article titled, Heat Transfer Coefficients Over a Flat Surface With Air and CO 2 Injection Through Compound Angle Holes Using a Transient Liquid Crystal Image Method
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Topics: Heat transfer coefficients, Liquid crystals, Tertiary petroleum recovery, Transients (Dynamics), Coolants, Density, Carbon dioxide, Coating processes, Coatings, Film cooling