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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

J. Turbomach. January 2017, 139(1): 011011.

Paper No: TURBO-16-1161

DOI: https://doi.org/10.1115/1.4034416

Published Online: September 20, 2016

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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

Paper No: GT2016-56661

DOI: https://doi.org/10.1115/GT2016-56661

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Topics: Cavities, Flow (Dynamics), Turbines, Blades, Annulus, Probes, Computational fluid dynamics, Design, Engineering simulation, Gas turbines

Journal Articles

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

K. Regina, A. I. Kalfas, R. S. Abhari

J. Turbomach. April 2015, 137(4): 041006.

Paper No: TURBO-14-1197

DOI: https://doi.org/10.1115/1.4028432

Published Online: October 28, 2014

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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

Paper No: GT2014-26007

DOI: https://doi.org/10.1115/GT2014-26007

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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

Paper No: GT2013-94481

DOI: https://doi.org/10.1115/GT2013-94481

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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

Paper No: GT2012-69466

DOI: https://doi.org/10.1115/GT2012-69466

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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

Paper No: GT2011-46354

DOI: https://doi.org/10.1115/GT2011-46354

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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

J. Turbomach. March 2012, 134(2): 021008.

DOI: https://doi.org/10.1115/1.4003247

Published Online: June 23, 2011

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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

Paper No: GT2010-22279

DOI: https://doi.org/10.1115/GT2010-22279

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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

Paper No: GT2008-50807

DOI: https://doi.org/10.1115/GT2008-50807

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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

Paper No: GT2008-51142

DOI: https://doi.org/10.1115/GT2008-51142

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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

Paper No: GT2007-27450

DOI: https://doi.org/10.1115/GT2007-27450

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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

Paper No: GT2007-27915

DOI: https://doi.org/10.1115/GT2007-27915

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Topics: Design, Turbines, Geometry, Blades, Flow (Dynamics), Stress, Vortices, Aerodynamics, Computer simulation, Leakage

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

Paper No: GT2002-30574

DOI: https://doi.org/10.1115/GT2002-30574

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Topics: Blades, High pressure (Physics), Steam turbines, Flow (Dynamics), Computer simulation, Engineering simulation, Rotors, Simulation, Stators, Axial flow

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

Paper No: GT2003-38271

DOI: https://doi.org/10.1115/GT2003-38271

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Topics: Cavities, Rotors, Turbines, Unsteady flow, Flow (Dynamics), Vortices, Pressure, Probes, Cavity flows, Fluids

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

Paper No: GT2003-38128

DOI: https://doi.org/10.1115/GT2003-38128

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Topics: Flow measurement, Probes, Sensors, Flow (Dynamics), Yaw, Cavities, Data acquisition, Design, Error analysis, Geometry

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

Paper No: GT2003-38389

DOI: https://doi.org/10.1115/GT2003-38389

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Topics: Blades, High pressure (Physics), Turbines, Vortices, Flow (Dynamics), Rotors, Stators, Wings, Computer simulation, Axial flow

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

Paper No: GT2003-38270

DOI: https://doi.org/10.1115/GT2003-38270

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Topics: Flow (Dynamics), Turbines, Cavities, Stators, Blades, Leakage, Vortices, Leakage flows, Pressure, Rotors

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

Paper No: GT2004-53869

DOI: https://doi.org/10.1115/GT2004-53869

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Topics: Fluid dynamics, Turbines, Blades, Flow (Dynamics), Geometry, Rotors, Vortices, Cavities, Cavity flows, Clearances (Engineering)

Proceedings Papers

Making Use of Labyrinth Interaction Flow

A. Pfau, A. I. Kalfas, R. S. Abhari

Proc. ASME. GT2004, Volume 5: Turbo Expo 2004, Parts A and B, 1313-1324, June 14–17, 2004

Paper No: GT2004-53797

DOI: https://doi.org/10.1115/GT2004-53797

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Topics: Flow (Dynamics), Design, Blades, Cavities, Leakage, Turbines, Equilibrium (Physics), Flow control, Fluids, High pressure (Physics)

Journal citation

NARROW

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

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

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

Aerodynamic Robustness of End Wall Contouring Against Rim Seal Purge Flow

A Preliminary Turbine Design for an Organic Rankine Cycle

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

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

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

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

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

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

Unsteady Entropy Measurements in a High-Speed Radial Compressor

Optimized Shroud Design for Axial Turbine Aerodynamic Performance

Blade Row Interaction in a High Pressure Steam Turbine

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

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

Vortex Transport and Blade Interactions in High Pressure Turbines

Effects of Labyrinth Seal Variation on Multistage Axial Turbine Flow

Fluid Dynamics and Performance of Partially and Fully Shrouded Axial Turbines

Making Use of Labyrinth Interaction Flow

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