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Pavlos K. Zachos
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Journal Articles

Evaluation of Extreme Value Predictions for Unsteady Flow Distortion of Aero-Engine Intakes

Matteo Migliorini, Pavlos K. Zachos, David G. MacManus
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. September 2024, 146(9): 094501.
Paper No: GTP-23-1520
https://doi.org/10.1115/1.4064728
Published Online: March 11, 2024
View Article titled, Evaluation of Extreme Value Predictions for Unsteady Flow Distortion of Aero-Engine Intakes
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Topics: Aircraft engines, Ducts, Flow (Dynamics), Fluctuations (Physics), Unsteady flow, Engineering standards, Testing, Propulsion systems, Gas turbines, Engineers
Proceedings Papers

Investigations of the Unsteady Aerodynamic Characteristics for Intakes at Crosswind

Tommaso Piovesan, Zhang Wenqiang, Mehdi Vahdati, Pavlos K. Zachos
Proc. ASME. GT2022, Volume 10C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V10CT33A009, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82149
https://doi.org/10.1115/GT2022-82149
View Paper titled, Investigations of the Unsteady Aerodynamic Characteristics for Intakes at Crosswind
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Topics: Computational fluid dynamics, Ducts, Engineering simulation, Flow (Dynamics), Separation (Technology), Simulation, Stability, Steady state, Unsteady flow, Vibration
Proceedings Papers

Assessing the Potential of Gas-Recuperation in Reheated Gas Turbines Within Combined Gas-Steam Power Plants

Adam Doligalski, Luis Sanchez de Leon, Pavlos K. Zachos, Vassilios Pachidis
Proc. ASME. GT2014, Volume 3A: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration, V03AT07A031, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-27048
https://doi.org/10.1115/GT2014-27048
View Paper titled, Assessing the Potential of Gas-Recuperation in Reheated Gas Turbines Within Combined Gas-Steam Power Plants
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Topics: Gas turbines, Power stations, Steam, Combined cycle power stations, Combined cycles, Cycles, Design, Thermal efficiency, Energy / power systems, Engines
Proceedings Papers

Probabilistic and Numerical Modelling of a Lobed Mixer at Windmilling Conditions

Maxime Lecoq, Nicholas Grech, Pavlos K. Zachos, Vassilios Pachidis
Proc. ASME. GT2013, Volume 2: Aircraft Engine; Coal, Biomass and Alternative Fuels; Cycle Innovations, V002T07A006, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94366
https://doi.org/10.1115/GT2013-94366
View Paper titled, Probabilistic and Numerical Modelling of a Lobed Mixer at Windmilling Conditions
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Topics: Computer simulation, Cycles, Design, Ducts, Engines, Exhaust systems, Flow (Dynamics), Gas turbines, Military systems, Modeling
Proceedings Papers

Considerations on the Compression System Preliminary Design of a Short Haul Aircraft Propulsion System

Giovanni Piscopo, Pavlos K. Zachos, Pericles Pilidis
Proc. ASME. GT2013, Volume 4: Ceramics; Concentrating Solar Power Plants; Controls, Diagnostics and Instrumentation; Education; Electric Power; Fans and Blowers, V004T08A010, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95749
https://doi.org/10.1115/GT2013-95749
View Paper titled, Considerations on the Compression System Preliminary Design of a Short Haul Aircraft Propulsion System
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Topics: Aircraft propulsion, Compression, Design, Compressors, Aircraft, Computer software, Engines, NASA, Propulsion systems, Temperature
Proceedings Papers

A Comparative Assessment of Dry Gas Turbine Cycles for Marine Applications

Luis Sanchez de Leon, Pavlos K. Zachos, Vassilios Pachidis
Proc. ASME. GT2013, Volume 5A: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V05AT22A005, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95321
https://doi.org/10.1115/GT2013-95321
View Paper titled, A Comparative Assessment of Dry Gas Turbine Cycles for Marine Applications
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Topics: Cycles, Gas turbines, Design, Power stations, Optimization, Ships, Stress, Thermal efficiency
Proceedings Papers

Axial Compressor Aerodynamics Under Sub-Idle Conditions

Enric Illana, Nicholas Grech, Pavlos K. Zachos, Vassilios Pachidis
Proc. ASME. GT2013, Volume 6A: Turbomachinery, V06AT35A006, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94368
https://doi.org/10.1115/GT2013-94368
View Paper titled, Axial Compressor Aerodynamics Under Sub-Idle Conditions
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Topics: Aerodynamics, Compressors, Flow (Dynamics), Mach number, Rotors, Computer simulation, Design, Engines, Blades, Compression
Proceedings Papers

Considerations on the Numerical Modelling and Performance of Axial Swirlers Under Relight Conditions

Charlie Koupper, Nicholas Grech, Pavlos K. Zachos, Vassilios Pachidis, Riti Singh
Proc. ASME. GT2012, Volume 3: Cycle Innovations; Education; Electric Power; Fans and Blowers; Industrial and Cogeneration, 65-77, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68416
https://doi.org/10.1115/GT2012-68416
View Paper titled, Considerations on the Numerical Modelling and Performance of Axial Swirlers Under Relight Conditions
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Topics: Modeling, Flight, Boundary-value problems, Engines, Mach number, Aircraft engines, Certainty, Combustion chambers, Flames, Regulations
Journal Articles

Considerations on the Numerical Modeling and Performance of Axial Swirlers Under Relight Conditions

Nicholas Grech, Charlie Koupper, Pavlos K. Zachos, Vassilios Pachidis, Riti Singh
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Gas Turbines: Combustion, Fuels, And Emissions
J. Eng. Gas Turbines Power. November 2012, 134(11): 111505.
https://doi.org/10.1115/1.4007132
Published Online: September 28, 2012
View Article titled, Considerations on the Numerical Modeling and Performance of Axial Swirlers Under Relight Conditions
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Topics: Computer simulation, Flow (Dynamics), Turbulence, Flames, Swirling flow, Boundary-value problems, Flight, Engineering simulation, Simulation, Pressure drop
Proceedings Papers

Compressor Blade Modelling Under Highly Negative Incedence

Pavlos K. Zachos, Cornelia Ruelke, Vassilios Pachidis, Riti Singh
Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 431-441, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-46621
https://doi.org/10.1115/GT2011-46621
View Paper titled, Compressor Blade Modelling Under Highly Negative Incedence
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Topics: Blades, Compressors, Modeling, Design, Engines, Aircraft engines, Combustion chambers, Computational fluid dynamics, Cross section (Physics), Databases
Journal Articles

A Sub-idle Compressor Characteristic Generation Method With Enhanced Physical Background

Pavlos K. Zachos, Ioanna Aslanidou, Vassilios Pachidis, Riti Singh
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2011, 133(8): 081702.
https://doi.org/10.1115/1.4002820
Published Online: April 7, 2011
View Article titled, A Sub-idle Compressor Characteristic Generation Method With Enhanced Physical Background
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Topics: Compressors, Flow (Dynamics), Blades, Pressure, Rotors, Torque
Proceedings Papers

Effects of the Swirl Velocity of a Jet in Crossflow From Fan Assemblies Mounted on Lifting Surfaces

Alexandros Terzis, Charilaos Kazakos, Nikolaos Papadopoulos, Anestis I. Kalfas, Pavlos K. Zachos, Pericles Pilidis
Proc. ASME. GT2010, Volume 3: Controls, Diagnostics and Instrumentation; Cycle Innovations; Marine, 831-842, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-23357
https://doi.org/10.1115/GT2010-23357
View Paper titled, Effects of the Swirl Velocity of a Jet in Crossflow From Fan Assemblies Mounted on Lifting Surfaces
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Topics: Aircraft, Angular momentum, Cooling, Cross-flow, Electromagnetic induction, Engineering systems and industry applications, Fans, Film cooling, Flight, Fluids
Proceedings Papers

A Physically Enhanced Method for Sub-Idle Compressor Map Generation and Representation

Ioanna Aslanidou, Pavlos K. Zachos, Vassilios Pachidis, Riti Singh
Proc. ASME. GT2010, Volume 3: Controls, Diagnostics and Instrumentation; Cycle Innovations; Marine, 899-908, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-23562
https://doi.org/10.1115/GT2010-23562
View Paper titled, A Physically Enhanced Method for Sub-Idle Compressor Map Generation and Representation
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Topics: Compressors, Engines, Design, Interpolation, Blades, Gas turbines, Geometry, Numerical analysis, Regulations, Rotors
Journal Articles

Effects of Swirl Velocities From Fan Assemblies Mounted on Lifting Surfaces

Alexandros Terzis, Charilaos Kazakos, Nikolaos Papadopoulos, Anestis Kalfas, Pavlos K. Zachos, Pericles Pilidis
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2011, 133(3): 031702.
https://doi.org/10.1115/1.4002099
Published Online: November 11, 2010
View Article titled, Effects of Swirl Velocities From Fan Assemblies Mounted on Lifting Surfaces
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Topics: Aircraft, Blades, Cooling, Fans, Film cooling, Flow (Dynamics), Fluids, Jets, Kidney, Rotation
Proceedings Papers

Flowfield Investigation of a Compressor Cascade at High Incidence—Part 1: Pneumatic Probe Measurements

Pavlos K. Zachos, Vassilios Pachidis, Bernard Charnley, Pericles Pilidis
Proc. ASME. GT2009, Volume 4: Cycle Innovations; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine, 345-354, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59906
https://doi.org/10.1115/GT2009-59906
View Paper titled, Flowfield Investigation of a Compressor Cascade at High Incidence—Part 1: Pneumatic Probe Measurements
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Topics: Cascades (Fluid dynamics), Compressors, Probes, Blades, Flow (Dynamics), Pressure, Design, Testing, Axial flow, Data acquisition
Proceedings Papers

Flowfield Investigation of a Compressor Cascade at High Incidence—Part 2: Numerical Analysis

Pavlos K. Zachos, Fabio Pengue, Vassilios Pachidis, Pericles Pilidis
Proc. ASME. GT2009, Volume 4: Cycle Innovations; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine, 355-362, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59908
https://doi.org/10.1115/GT2009-59908
View Paper titled, Flowfield Investigation of a Compressor Cascade at High Incidence—Part 2: Numerical Analysis
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Topics: Cascades (Fluid dynamics), Compressors, Numerical analysis, Blades, Computational fluid dynamics, Design, Testing, Axial flow, Boundary-value problems, Flow (Dynamics)