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Journal Articles

Modulation and Radial Migration of Turbine Hub Cavity Modes by the Rim Seal Purge Flow

R. Schädler, A. I. Kalfas, R. S. Abhari, G. Schmid, S. Voelker
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. January 2017, 139(1): 011011.
Paper No: TURBO-16-1161
https://doi.org/10.1115/1.4034416
Published Online: September 20, 2016
View Article titled, Modulation and Radial Migration of Turbine Hub Cavity Modes by the Rim Seal Purge Flow
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Topics: Cavities, Flow (Dynamics), Pressure, Turbines, Rotors, Blades, Stators, Annulus
Proceedings Papers

Modulation and Radial Migration of Turbine Hub Cavity Modes by the Rim Seal Purge Flow

R. Schädler, A. I. Kalfas, R. S. Abhari, G. Schmid, S. Voelker
Proc. ASME. GT2016, Volume 2B: Turbomachinery, V02BT38A025, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56661
https://doi.org/10.1115/GT2016-56661
View Paper titled, Modulation and Radial Migration of Turbine Hub Cavity Modes by the Rim Seal Purge Flow
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Topics: Cavities, Flow (Dynamics), Turbines, Blades, Annulus, Probes, Computational fluid dynamics, Design, Engineering simulation, Gas turbines
Journal Articles

Volumetric Three-Dimensional Wind Measurement Using a Single Mobile-Based LiDAR

M. Zendehbad, N. Chokani, R. S. Abhari
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research-Article
J. Sol. Energy Eng. February 2016, 138(1): 011003.
Paper No: SOL-14-1354
https://doi.org/10.1115/1.4031946
Published Online: November 25, 2015
View Article titled, Volumetric Three-Dimensional Wind Measurement Using a Single Mobile-Based LiDAR
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Topics: Wakes, Wind, Wind velocity, Wind farms, Turbines
Proceedings Papers

Multi-Scale Measurements in Wind Farms in Complex and Flat Terrain

M. Zendehbad, N. Chokani, R. S. Abhari
Proc. ASME. GT2015, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T46A010, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42583
https://doi.org/10.1115/GT2015-42583
View Paper titled, Multi-Scale Measurements in Wind Farms in Complex and Flat Terrain
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Topics: Wind farms, Wakes, Wind, Rotors, Turbines, Wind turbines, Energy generation, Flow (Dynamics), Flow measurement, Reynolds number
Journal Articles

Drone-Based Experimental Investigation of Three-Dimensional Flow Structure of a Multi-Megawatt Wind Turbine in Complex Terrain

B. Subramanian, N. Chokani, R. S. Abhari
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research-Article
J. Sol. Energy Eng. October 2015, 137(5): 051007.
Paper No: SOL-14-1189
https://doi.org/10.1115/1.4031038
Published Online: July 23, 2015
View Article titled, Drone-Based Experimental Investigation of Three-Dimensional Flow Structure of a Multi-Megawatt Wind Turbine in Complex Terrain
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Topics: Flow (Dynamics), Rotors, Turbines, Unmanned aerial vehicles, Wakes, Wind, Wind turbines, Wind velocity, Pressure, Trajectories (Physics)
Proceedings Papers

Comparison of Time-Resolved Turbine Rotor Blade Heat Transfer Measurements and Numerical Calculations

R. S. Abhari, G. R. Guenette, A. H. Epstein, M. B. Giles
Proc. ASME. GT1991, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A018, June 3–6, 1991
Publisher: American Society of Mechanical Engineers
Paper No: 91-GT-268
https://doi.org/10.1115/91-GT-268
View Paper titled, Comparison of Time-Resolved Turbine Rotor Blade Heat Transfer Measurements and Numerical Calculations
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Topics: Blades, Heat transfer, Rotors, Turbines, Pressure, Algebra, Algorithms, Suction, Turbulence, Boundary layers
Journal Articles

Experimental Investigation of Purge Flow Effects on a High Pressure Turbine Stage

K. Regina, A. I. Kalfas, R. S. Abhari
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. April 2015, 137(4): 041006.
Paper No: TURBO-14-1197
https://doi.org/10.1115/1.4028432
Published Online: October 28, 2014
View Article titled, Experimental Investigation of Purge Flow Effects on a High Pressure Turbine Stage
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Topics: Flow (Dynamics), Rotors, Turbines
Proceedings Papers

Aerodynamic Robustness of End Wall Contouring Against Rim Seal Purge Flow

K. Regina, A. I. Kalfas, R. S. Abhari, A. Lohaus, S. Voelker, T. auf dem Kampe
Proc. ASME. GT2014, Volume 2C: Turbomachinery, V02CT38A027, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26007
https://doi.org/10.1115/GT2014-26007
View Paper titled, Aerodynamic Robustness of End Wall Contouring Against Rim Seal Purge Flow
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Topics: Flow (Dynamics), Robustness, Design, Turbines, Probes, Annulus, Gas turbines, High pressure (Physics), Rotors
Proceedings Papers

Experimental Study of Aero-Mechanical Damping of Full-Scale Wind Turbines

M. Zendehbad, N. Chokani, R. S. Abhari
Proc. ASME. GT2014, Volume 3B: Oil and Gas Applications; Organic Rankine Cycle Power Systems; Supercritical CO2 Power Cycles; Wind Energy, V03BT46A007, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25436
https://doi.org/10.1115/GT2014-25436
View Paper titled, Experimental Study of Aero-Mechanical Damping of Full-Scale Wind Turbines
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Topics: Damping, Wind turbines, Wind, Wind farms, Databases, Deflection, Design, Dynamic models, Dynamic response, Fatigue life
Proceedings Papers

Increasing On-Shore Wind Generated Electricity in Germany’s Transmission Grid

A. Singh, D. Willi, N. Chokani, R. S. Abhari
Proc. ASME. GT2014, Volume 3B: Oil and Gas Applications; Organic Rankine Cycle Power Systems; Supercritical CO2 Power Cycles; Wind Energy, V03BT46A020, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26093
https://doi.org/10.1115/GT2014-26093
View Paper titled, Increasing On-Shore Wind Generated Electricity in Germany’s Transmission Grid
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Topics: Wind, Renewable energy sources, Solar energy, Energy generation, Engineering simulation, Renewable energy, Risk, Security, Simulation, Transmission lines
Proceedings Papers

Full-Annular Numerical Investigation of the Rim Seal Cavity Flows Using GPU’s

A. M. Basol, A. Raheem, M. Huber, R. S. Abhari
Proc. ASME. GT2014, Volume 2D: Turbomachinery, V02DT44A034, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26755
https://doi.org/10.1115/GT2014-26755
View Paper titled, Full-Annular Numerical Investigation of the Rim Seal Cavity Flows Using GPU’s
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Topics: Blades, Bubbles, Cavities, Cavity flows, Disks, Engineering simulation, Flow (Dynamics), Fluctuations (Physics), Graphics processing units, High pressure (Physics)
Journal Articles

Increasing On-Shore Wind Generated Electricity in Germany's Transmission Grid

A. Singh, D. Willi, N. Chokani, R. S. Abhari
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2015, 137(2): 021801.
Paper No: GTP-14-1341
https://doi.org/10.1115/1.4028380
Published Online: September 16, 2014
View Article titled, Increasing On-Shore Wind Generated Electricity in Germany's Transmission Grid
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Topics: Energy generation, Generators, Power systems (Machinery), Simulation, Solar energy, Transmission lines, Wind, Renewable energy, Wind power
Proceedings Papers

Influence of Vane/Blade Spacing on the Heat Flux for a Transonic Turbine

M. G. Dunn, C. W. Haldeman, R. S. Abhari, M. L. McMillan
Proc. ASME. GT2000, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A014, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0206
https://doi.org/10.1115/2000-GT-0206
View Paper titled, Influence of Vane/Blade Spacing on the Heat Flux for a Transonic Turbine
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Topics: Blades, Heat flux, Turbines, Pressure, Chords (Trusses), Heat, Reynolds number, Stress
Proceedings Papers

A Novel Technique for the Measurement of Blade Damping Using Piezoelectric Actuators

T. R. Jeffers, J. J. Kielb, R. S. Abhari
Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A005, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0359
https://doi.org/10.1115/2000-GT-0359
View Paper titled, A Novel Technique for the Measurement of Blade Damping Using Piezoelectric Actuators
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Topics: Blades, Damping, Piezoelectric actuators, Resonance, Disks, Strain gages, Turbine blades, Turbomachinery, Cantilevers, Contamination
Proceedings Papers

Experimental and Computational Investigation of the Time-Averaged and Time-Resolved Pressure Loading on a Vaneless Counter-Rotating Turbine

C. W. Haldeman, M. G. Dunn, R. S. Abhari, P. D. Johnson, X. A. Montesdeoca
Proc. ASME. GT2000, Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, V001T03A019, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0445
https://doi.org/10.1115/2000-GT-0445
View Paper titled, Experimental and Computational Investigation of the Time-Averaged and Time-Resolved Pressure Loading on a Vaneless Counter-Rotating Turbine
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Topics: Pressure, Turbines, Design, Blades, Computational fluid dynamics, High pressure (Physics), Calibration, Engines, Hardware, Physics
Proceedings Papers

The 2-Stage Axial Turbine Test Facility “ LISA ”

M. Sell, J. Schlienger, A. Pfau, M. Treiber, R. S. Abhari
Proc. ASME. GT2001, Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, V001T03A076, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0492
https://doi.org/10.1115/2001-GT-0492
View Paper titled, The 2-Stage Axial Turbine Test Facility “ LISA ”
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Topics: Test facilities, Turbines, Pressure, Design, Flow (Dynamics), Stators, Unsteady flow, Blades, Brakes, Chords (Trusses)
Journal Articles

Simulation of Wake Interactions in Wind Farms Using an Immersed Wind Turbine Model

S. Jafari, N. Chokani, R. S. Abhari
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. June 2014, 136(6): 061018.
Paper No: TURBO-13-1193
https://doi.org/10.1115/1.4025762
Published Online: November 28, 2013
View Article titled, Simulation of Wake Interactions in Wind Farms Using an Immersed Wind Turbine Model
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Topics: Simulation, Turbines, Turbulence, Wakes, Wind farms, Wind turbines, Wind
Proceedings Papers

RANS Computations of Wind Turbine Near-Wake Aerodynamics in Uniform and Yawed Inflow

C. Tsalicoglou, S. Jafari, N. Chokani, R. S. Abhari
Proc. ASME. GT2013, Volume 8: Supercritical CO2 Power Cycles; Wind Energy; Honors and Awards, V008T44A025, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-96034
https://doi.org/10.1115/GT2013-96034
View Paper titled, RANS Computations of Wind Turbine Near-Wake Aerodynamics in Uniform and Yawed Inflow
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Topics: Aerodynamics, Computation, Inflow, Reynolds-averaged Navier–Stokes equations, Wakes, Wind turbines, Flow (Dynamics), Engineering simulation, Simulation, Horizontal axis wind turbines
Proceedings Papers

Optimizing Synergy of Utility-Scale Wind and Pumped-Hydro Storage

A. Singh, F. Wolff, N. Chokani, R. S. Abhari
Proc. ASME. GT2013, Volume 8: Supercritical CO2 Power Cycles; Wind Energy; Honors and Awards, V008T44A014, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94552
https://doi.org/10.1115/GT2013-94552
View Paper titled, Optimizing Synergy of Utility-Scale Wind and Pumped-Hydro Storage
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Topics: Storage, Wind, Wind energy
Proceedings Papers

Simulation of Wake Interactions in Wind Farms Using an Immersed Wind Turbine Model

S. Jafari, N. Chokani, R. S. Abhari
Proc. ASME. GT2013, Volume 8: Supercritical CO2 Power Cycles; Wind Energy; Honors and Awards, V008T44A026, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-96035
https://doi.org/10.1115/GT2013-96035
View Paper titled, Simulation of Wake Interactions in Wind Farms Using an Immersed Wind Turbine Model
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Topics: Simulation, Wakes, Wind farms, Wind turbines, Computational fluid dynamics, Microscale devices, Modeling, Turbines, Turbulence, Wind