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John P. Longley
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Proceedings Papers

A New Multi-Stage Turbine Stator Design for Improved Performance Retention

Heather K. Jameson, John P. Longley
Proc. ASME. GT2020, Volume 2B: Turbomachinery, V02BT33A006, September 21–25, 2020
Paper No: GT2020-14407
DOI: https://doi.org/10.1115/GT2020-14407
View Paper titled, A New Multi-Stage Turbine Stator Design for Improved Performance Retention
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Topics: Design, Stators, Turbines, Vortices, Rotors, Cavities, Flow (Dynamics), Leakage, Leakage flows, Separation (Technology)
Journal Articles

Modelling the Unsteady Dynamics of a Turbine Research Facility

Accepted Manuscript
John P. Longley
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach.
Paper No: TURBO-20-1034
DOI: https://doi.org/10.1115/1.4048021
Published Online: August 7, 2020
View Article titled, Modelling the Unsteady Dynamics of a Turbine Research Facility
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Topics: Dynamics (Mechanics), Modeling, Turbines, Turbochargers, Control systems, Simulation, Computational fluid dynamics, Flow (Dynamics), Noise (Sound), Brakes
Proceedings Papers

Modelling the Unsteady Dynamics of a Turbine Research Facility

John P. Longley
Proc. ASME. GT2019, Volume 2C: Turbomachinery, V02CT41A015, June 17–21, 2019
Paper No: GT2019-90352
DOI: https://doi.org/10.1115/GT2019-90352
View Paper titled, Modelling the Unsteady Dynamics of a Turbine Research Facility
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Topics: Dynamics (Mechanics), Modeling, Turbines, Control systems, Simulation, Flow (Dynamics), Noise (Sound), Brakes, Honeycomb structures, Reliability
Journal Articles

Clocking in Low-Pressure Turbines

Kathryn R. Evans, John P. Longley
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. October 2017, 139(10): 101003.
Paper No: TURBO-16-1220
DOI: https://doi.org/10.1115/1.4036341
Published Online: May 9, 2017
View Article titled, Clocking in Low-Pressure Turbines
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Topics: Flow (Dynamics), Stators, Turbines, Wakes, Pressure, Rotors, Blades
Journal Articles

Accounting for Uncontrolled Variations in Low-Speed Turbine Experiments

Kathryn R. Evans, John P. Longley
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. October 2017, 139(10): 101005.
Paper No: TURBO-16-1222
DOI: https://doi.org/10.1115/1.4036342
Published Online: May 9, 2017
View Article titled, Accounting for Uncontrolled Variations in Low-Speed Turbine Experiments
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Topics: Accounting, Blades, Flow (Dynamics), Turbines, Reynolds number
Journal Articles

Accounting for Eccentricity in Compressor Performance Predictions

Anna M. Young, Teng Cao, Ivor J. Day, John P. Longley
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. September 2017, 139(9): 091008.
Paper No: TURBO-17-1014
DOI: https://doi.org/10.1115/1.4036201
Published Online: April 19, 2017
View Article titled, Accounting for Eccentricity in Compressor Performance Predictions
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Topics: Clearances (Engineering), Compressors, Flow (Dynamics), Annulus, Rotors
Proceedings Papers

Accounting for Eccentricity in Compressor Performance Predictions

Anna M. Young, Teng Cao, Ivor J. Day, John P. Longley
Proc. ASME. GT2016, Volume 2A: Turbomachinery, V02AT37A017, June 13–17, 2016
Paper No: GT2016-56681
DOI: https://doi.org/10.1115/GT2016-56681
View Paper titled, Accounting for Eccentricity in Compressor Performance Predictions
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Topics: Accounting, Compressors, Clearances (Engineering), Machinery, Aircraft engines, Design, Engines, Modeling, Pressure, Stability
Proceedings Papers

A Review of Non-Steady Flow Models for Compressor Stability

John P. Longley
Proc. ASME. GT1993, Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, V001T03A006, May 24–27, 1993
Paper No: 93-GT-017
DOI: https://doi.org/10.1115/93-GT-017
View Paper titled, A Review of Non-Steady Flow Models for Compressor Stability
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Topics: Compressors, Stability, Unsteady flow, Modeling, Fluid dynamics
Proceedings Papers

Calculating the Flowfield Behaviour of High-Speed Multi-Stage Compressors

John P. Longley
Proc. ASME. GT1997, Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, V001T03A084, June 2–5, 1997
Paper No: 97-GT-468
DOI: https://doi.org/10.1115/97-GT-468
View Paper titled, Calculating the Flowfield Behaviour of High-Speed Multi-Stage Compressors
Click here to open pdf in another window PDF for Calculating the Flowfield Behaviour of High-Speed Multi-Stage Compressors
Topics: Compressors, Blades, Flow (Dynamics), Simulation, Dynamics (Mechanics), Fluid dynamics, Nonlinear equations, Steady state, Unsteady flow
Proceedings Papers

Controlling Tip Leakage Flow Over a Shrouded Turbine Rotor Using an Air-Curtain

Eric M. Curtis, John D. Denton, John P. Longley, Budimir Rosic
Proc. ASME. GT2009, Volume 7: Turbomachinery, Parts A and B, 885-894, June 8–12, 2009
Paper No: GT2009-59411
DOI: https://doi.org/10.1115/GT2009-59411
View Paper titled, Controlling Tip Leakage Flow Over a Shrouded Turbine Rotor Using an Air-Curtain
Click here to open pdf in another window PDF for Controlling Tip Leakage Flow Over a Shrouded Turbine Rotor Using an Air-Curtain
Topics: Leakage flows, Rotors, Turbines, Flow (Dynamics), Leakage, Blades, Cavities, Clearances (Engineering), Instrumentation, Jets
Proceedings Papers

Calculating Stall and Surge Transients

John P. Longley
Proc. ASME. GT2007, Volume 6: Turbo Expo 2007, Parts A and B, 125-136, May 14–17, 2007
Paper No: GT2007-27378
DOI: https://doi.org/10.1115/GT2007-27378
View Paper titled, Calculating Stall and Surge Transients
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Topics: Surges, Transients (Dynamics), Blades, Compression, Flow (Dynamics), Simulation, Design, Stress
Proceedings Papers

An Experimental Study of the Inception of Rotating Stall in a Single-Stage Low-Speed Axial Compressor

Alexander K. Simpson, John P. Longley
Proc. ASME. GT2007, Volume 6: Turbo Expo 2007, Parts A and B, 87-97, May 14–17, 2007
Paper No: GT2007-27181
DOI: https://doi.org/10.1115/GT2007-27181
View Paper titled, An Experimental Study of the Inception of Rotating Stall in a Single-Stage Low-Speed Axial Compressor
Click here to open pdf in another window PDF for An Experimental Study of the Inception of Rotating Stall in a Single-Stage Low-Speed Axial Compressor
Topics: Compressors, Rotors, Stall inception, Axial flow, Blades, Geometry, Stability, Stators