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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

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
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

A Preliminary Turbine Design for an Organic Rankine Cycle

T. Efstathiadis, M. Rivarolo, A. I. Kalfas, A. Traverso, P. Seferlis
Proc. ASME. GT2013, Volume 2: Aircraft Engine; Coal, Biomass and Alternative Fuels; Cycle Innovations, V002T07A008, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94481
https://doi.org/10.1115/GT2013-94481
View Paper titled, A Preliminary Turbine Design for an Organic Rankine Cycle
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Topics: Design, Energy resources, Enthalpy, Organic Rankine cycle, Turbines
Proceedings Papers

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

K. Regina, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2012, Volume 8: Turbomachinery, Parts A, B, and C, 1509-1519, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-69466
https://doi.org/10.1115/GT2012-69466
View Paper titled, Experimental Investigation of Purge Flow Effects on a High Pressure Turbine Stage
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Topics: Flow (Dynamics), High pressure (Physics), Turbines, Rotors, Displacement, Design, Probes, Vortices, Aerodynamic flow, Cavities
Proceedings Papers

Integrated Combustor–Turbine Design for Improved Aerothermal Performance: Effect of Dilution Air Control

A. M. Basol, K. Regina, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2011, Volume 5: Heat Transfer, Parts A and B, 1967-1977, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-46354
https://doi.org/10.1115/GT2011-46354
View Paper titled, Integrated Combustor–Turbine Design for Improved Aerothermal Performance: Effect of Dilution Air Control
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Topics: Combustion chambers, Design, Turbines, Heat, Stress, Blades, Rotors, Shapes, Stators, Boundary-value problems
Journal Articles

Impact of Time-Resolved Entropy Measurement on a One-and-One-Half-Stage Axial Turbine Performance

M. Mansour, N. Chokani, A. I. Kalfas, R. S. Abhari
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021008.
https://doi.org/10.1115/1.4003247
Published Online: June 23, 2011
View Article titled, Impact of Time-Resolved Entropy Measurement on a One-and-One-Half-Stage Axial Turbine Performance
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Topics: Entropy, Flow (Dynamics), Pressure, Rotors, Stators, Turbines, Wakes, Blades, Vortices, Probes
Proceedings Papers

Effects of Design Variations of Rotor Entry Cavity Geometry on Shrouded Steam Turbine Performance

K. G. Barmpalias, A. I. Kalfas, R. S. Abhari, Toshio Hirano, Naoki Shibukawa
Proc. ASME. GT2010, Volume 7: Turbomachinery, Parts A, B, and C, 2127-2137, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22279
https://doi.org/10.1115/GT2010-22279
View Paper titled, Effects of Design Variations of Rotor Entry Cavity Geometry on Shrouded Steam Turbine Performance
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Topics: Cavities, Design, Geometry, Rotors, Steam turbines, Flow (Dynamics), Blades, Clearances (Engineering), Probes, Safety
Proceedings Papers

Impact of Time-Resolved Entropy Measurement on a One-and-1/2-Stage Axial Turbine Performance

M. Mansour, N. Chokani, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2008, Volume 6: Turbomachinery, Parts A, B, and C, 1289-1300, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50807
https://doi.org/10.1115/GT2008-50807
View Paper titled, Impact of Time-Resolved Entropy Measurement on a One-and-1/2-Stage Axial Turbine Performance
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Topics: Entropy, Turbines, Probes, Rotors, Design, Pressure, Stators, Aircraft engines, Blades, Flow (Dynamics)
Proceedings Papers

The Dynamics of the Vorticity Field in a Low Solidity Axial Turbine

K. G. Barmpalias, A. I. Kalfas, N. Chokani, R. S. Abhari
Proc. ASME. GT2008, Volume 6: Turbomachinery, Parts A, B, and C, 1359-1368, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-51142
https://doi.org/10.1115/GT2008-51142
View Paper titled, The Dynamics of the Vorticity Field in a Low Solidity Axial Turbine
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Topics: Dynamics (Mechanics), Turbines, Vorticity, Flow (Dynamics), Blades, Vortices, Design, High pressure (Physics), Pressure, Probes
Proceedings Papers

Unsteady Entropy Measurements in a High-Speed Radial Compressor

M. Mansour, N. Chokani, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2007, Volume 1: Turbo Expo 2007, 625-637, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27450
https://doi.org/10.1115/GT2007-27450
View Paper titled, Unsteady Entropy Measurements in a High-Speed Radial Compressor
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Topics: Compressors, Entropy, Probes, Impellers, Design, Gages, Sensors, Thin films, Flow (Dynamics), Jets
Proceedings Papers

Optimized Shroud Design for Axial Turbine Aerodynamic Performance

L. Porreca, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2007, Volume 6: Turbo Expo 2007, Parts A and B, 803-815, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27915
https://doi.org/10.1115/GT2007-27915
View Paper titled, Optimized Shroud Design for Axial Turbine Aerodynamic Performance
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Topics: Design, Turbines, Geometry, Blades, Flow (Dynamics), Stress, Vortices, Aerodynamics, Computer simulation, Leakage
Proceedings Papers

Unsteady, 3-Dimensional Flow Measurement Using a Miniature Virtual 4 Sensor Fast Response Aerodynamic Probe (FRAP)

A. Pfau, J. Schlienger, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2003, Volume 1: Turbo Expo 2003, 307-315, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38128
https://doi.org/10.1115/GT2003-38128
View Paper titled, Unsteady, 3-Dimensional Flow Measurement Using a Miniature Virtual 4 Sensor Fast Response Aerodynamic Probe (FRAP)
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Topics: Flow measurement, Probes, Sensors, Flow (Dynamics), Yaw, Cavities, Data acquisition, Design, Error analysis, Geometry
Proceedings Papers

Unsteady Flow Interactions Within the Inlet Cavity of a Turbine Rotor Tip Labyrinth Seal

A. Pfau, J. Schlienger, D. Rusch, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2003, Volume 6: Turbo Expo 2003, Parts A and B, 187-199, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38271
https://doi.org/10.1115/GT2003-38271
View Paper titled, Unsteady Flow Interactions Within the Inlet Cavity of a Turbine Rotor Tip Labyrinth Seal
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Topics: Cavities, Rotors, Turbines, Unsteady flow, Flow (Dynamics), Vortices, Pressure, Probes, Cavity flows, Fluids
Proceedings Papers

Effects of Labyrinth Seal Variation on Multistage Axial Turbine Flow

J. Schlienger, A. Pfau, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2003, Volume 6: Turbo Expo 2003, Parts A and B, 173-185, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38270
https://doi.org/10.1115/GT2003-38270
View Paper titled, Effects of Labyrinth Seal Variation on Multistage Axial Turbine Flow
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Topics: Flow (Dynamics), Turbines, Cavities, Stators, Blades, Leakage, Vortices, Leakage flows, Pressure, Rotors
Proceedings Papers

Vortex Transport and Blade Interactions in High Pressure Turbines

V. S. P. Chaluvadi, A. I. Kalfas, H. P. Hodson
Proc. ASME. GT2003, Volume 6: Turbo Expo 2003, Parts A and B, 223-234, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38389
https://doi.org/10.1115/GT2003-38389
View Paper titled, Vortex Transport and Blade Interactions in High Pressure Turbines
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Topics: Blades, High pressure (Physics), Turbines, Vortices, Flow (Dynamics), Rotors, Stators, Wings, Computer simulation, Axial flow
Proceedings Papers

Blade Row Interaction in a High Pressure Steam Turbine

V. S. P. Chaluvadi, A. I. Kalfas, H. P. Hodson, H. Ohyama, E. Watanabe
Proc. ASME. GT2002, Volume 5: Turbo Expo 2002, Parts A and B, 957-968, June 3–6, 2002
Publisher: American Society of Mechanical Engineers
Paper No: GT2002-30574
https://doi.org/10.1115/GT2002-30574
View Paper titled, Blade Row Interaction in a High Pressure Steam Turbine
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Topics: Blades, High pressure (Physics), Steam turbines, Flow (Dynamics), Computer simulation, Engineering simulation, Rotors, Simulation, Stators, Axial flow
Proceedings Papers

Multistage Aspects and Unsteady Effects of Stator and Rotor Clocking in an Axial Turbine With Low Aspect Ratio Blading

T. Behr, L. Porreca, T. Mokulys, A. I. Kalfas, R. S. Abhari
Proc. ASME. GT2004, Volume 5: Turbo Expo 2004, Parts A and B, 1211-1222, June 14–17, 2004
Publisher: American Society of Mechanical Engineers
Paper No: GT2004-53612
https://doi.org/10.1115/GT2004-53612
View Paper titled, Multistage Aspects and Unsteady Effects of Stator and Rotor Clocking in an Axial Turbine With Low Aspect Ratio Blading
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Topics: Rotors, Stators, Turbines, Flow (Dynamics), Blades, Probes, Fluids, Geometry, High pressure (Physics), Numerical analysis
Proceedings Papers

Fluid Dynamics and Performance of Partially and Fully Shrouded Axial Turbines

L. Porreca, T. Behr, J. Schlienger, A. I. Kalfas, R. S. Abhari, J. Ehrhard, E. Janke
Proc. ASME. GT2004, Volume 5: Turbo Expo 2004, Parts A and B, 925-937, June 14–17, 2004
Publisher: American Society of Mechanical Engineers
Paper No: GT2004-53869
https://doi.org/10.1115/GT2004-53869
View Paper titled, Fluid Dynamics and Performance of Partially and Fully Shrouded Axial Turbines
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Topics: Fluid dynamics, Turbines, Blades, Flow (Dynamics), Geometry, Rotors, Vortices, Cavities, Cavity flows, Clearances (Engineering)