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Journal Articles

Flow Distortion Into the Core Engine for an Installed Variable Pitch Fan in Reverse Thrust Mode

David John Rajendran, Vassilios Pachidis
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2021, 143(7): 071001.
Paper No: TURBO-20-1252
https://doi.org/10.1115/1.4050331
Published Online: April 8, 2021
View Article titled, Flow Distortion Into the Core Engine for an Installed Variable Pitch Fan in Reverse Thrust Mode
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Topics: Engines, Flow (Dynamics), Pressure, Thrust, Separation (Technology)
Journal Articles

A Loss and Deflection Model for Compressor Blading at High Negative Incidence

Luis E. Ferrer-Vidal, Marc Schneider, Alessandro Allegretti, Vassilios Pachidis
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2019, 141(12): 121001.
Paper No: TURBO-19-1050
https://doi.org/10.1115/1.4044967
Published Online: October 23, 2019
View Article titled, A Loss and Deflection Model for Compressor Blading at High Negative Incidence
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Topics: Blades, Compressors, Deflection, Flow (Dynamics), Design, Mach number, Computational fluid dynamics
Proceedings Papers

Aerodynamic Performance of an Unlocated High Pressure Turbine Rotor With Worn Tip Seal Fins

Lucas Pawsey, David John Rajendran, Vassilios Pachidis
Proc. ASME. GT2017, Volume 2A: Turbomachinery, V02AT40A023, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64312
https://doi.org/10.1115/GT2017-64312
View Paper titled, Aerodynamic Performance of an Unlocated High Pressure Turbine Rotor With Worn Tip Seal Fins
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Topics: Fins, High pressure (Physics), Rotors, Turbines, Displacement, Manufacturing, Blades, Failure, Geometry, Stators
Proceedings Papers

Assessment of the Effect of Environmental Conditions on Rotorcraft Pollutant Emissions at Mission Level

Jesus Ortiz-Carretero, Alejandro Castillo Pardo, Vassilios Pachidis, Ioannis Goulos
Proc. ASME. GT2017, Volume 1: Aircraft Engine; Fans and Blowers; Marine; Honors and Awards, V001T01A010, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63440
https://doi.org/10.1115/GT2017-63440
View Paper titled, Assessment of the Effect of Environmental Conditions on Rotorcraft Pollutant Emissions at Mission Level
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Topics: Emissions, Pollution, Engines, Fuels, Nitrogen oxides, Aerodynamics, Biomedicine, Commercial air transport, Compressors, Computer software
Proceedings Papers

Direct Coupling of a Two-Dimensional Fan Model in a Turbofan Engine Performance Simulation

Ioannis Templalexis, Alexios Alexiou, Vassilios Pachidis, Ioannis Roumeliotis, Nikolaos Aretakis
Proc. ASME. GT2016, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, V003T06A008, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56617
https://doi.org/10.1115/GT2016-56617
View Paper titled, Direct Coupling of a Two-Dimensional Fan Model in a Turbofan Engine Performance Simulation
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Topics: Engines, Simulation, Turbofans, Design, Flow (Dynamics), Aircraft, Computational fluid dynamics, Geometry, Jets, Optimization
Proceedings Papers

Multi-Objective Optimization of a Regenerative Rotorcraft Powerplant: Quantification of Fuel Economy and Environmental Impact

Fakhre Ali, Konstantinos Tzanidakis, Ioannis Goulos, Vassilios Pachidis, Roberto d’Ippolito
Proc. ASME. GT2015, Volume 1: Aircraft Engine; Fans and Blowers; Marine, V001T01A035, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-44001
https://doi.org/10.1115/GT2015-44001
View Paper titled, Multi-Objective Optimization of a Regenerative Rotorcraft Powerplant: Quantification of Fuel Economy and Environmental Impact
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Topics: Corporate average fuel economy, Fuel efficiency, Pareto optimization, Power stations, Engines, Design, Pressure, Compressors, Emissions, Engine design
Proceedings Papers

Design Space Exploration and Optimization of Conceptual Rotorcraft Powerplants

Fakhre Ali, Konstantinos Tzanidakis, Ioannis Goulos, Vassilios Pachidis, Roberto d’Ippolito
Proc. ASME. GT2015, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration, V003T06A025, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-44003
https://doi.org/10.1115/GT2015-44003
View Paper titled, Design Space Exploration and Optimization of Conceptual Rotorcraft Powerplants
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Topics: Design, Optimization, Power stations, Engines, Emissions, Engine design, Gas turbines, Weight (Mass), Aerodynamics, Corporate average fuel economy
Proceedings Papers

Numerical Study of the Effect of Multiple Tightly-Wound Vortices on a Transonic Fan Stage Performance

Alejandro Castillo Pardo, Ahad Mehdi, Vassilios Pachidis, David G. MacManus
Proc. ASME. GT2014, Volume 1A: Aircraft Engine; Fans and Blowers, V01AT01A033, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26481
https://doi.org/10.1115/GT2014-26481
View Paper titled, Numerical Study of the Effect of Multiple Tightly-Wound Vortices on a Transonic Fan Stage Performance
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Topics: Vortices, Flow (Dynamics), Pressure, Rotors, Computational fluid dynamics, Engine design, Engines, Numerical analysis, Risk, Steady state
Proceedings Papers

A Multidisciplinary Approach for the Comprehensive Assessment of Integrated Rotorcraft–Powerplant Systems at Mission Level

Fakhre Ali, Ioannis Goulos, Konstantinos Tzanidakis, Vassilios Pachidis, Roberto d’Ippolito
Proc. ASME. GT2014, Volume 4A: Combustion, Fuels and Emissions, V04AT04A004, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25037
https://doi.org/10.1115/GT2014-25037
View Paper titled, A Multidisciplinary Approach for the Comprehensive Assessment of Integrated Rotorcraft–Powerplant Systems at Mission Level
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Topics: Power stations, Emissions, Nitrogen oxides, Flight, Aircraft, Fuel consumption, Physics, Pollution, Aerodynamics, Combustion chambers
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

Unsteady Compressor Performance Assessment Using Euler Solvers

Serena Zoppellari, Vassilios Pachidis
Proc. ASME. GT2014, Volume 2D: Turbomachinery, V02DT44A027, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26491
https://doi.org/10.1115/GT2014-26491
View Paper titled, Unsteady Compressor Performance Assessment Using Euler Solvers
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Topics: Compressors, Flow (Dynamics), Computational fluid dynamics, Pressure, Engineering simulation, Simulation, Cross-flow, Design, FORTRAN, Modeling
Proceedings Papers

Real-Time Simulation of Rotor Blade Aeroelasticity for the Multidisciplinary Design of Rotorcraft

Ioannis Goulos, Vassilios Pachidis
Proc. ASME. GT2014, Volume 1A: Aircraft Engine; Fans and Blowers, V01AT01A038, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26882
https://doi.org/10.1115/GT2014-26882
View Paper titled, Real-Time Simulation of Rotor Blade Aeroelasticity for the Multidisciplinary Design of Rotorcraft
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Topics: Aeroelasticity, Blades, Design, Rotors, Simulation, Flight, Stress, Transients (Dynamics), Aerodynamics, Centrifugal force
Proceedings Papers

On the Numerical Simulation of Turbine Blade Tangling After a Shaft Failure

Aleixo Gonzalez, Vassilios Pachidis
Proc. ASME. GT2014, Volume 7B: Structures and Dynamics, V07BT33A026, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-27061
https://doi.org/10.1115/GT2014-27061
View Paper titled, On the Numerical Simulation of Turbine Blade Tangling After a Shaft Failure
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Topics: Computer simulation, Failure, Turbine blades, Blades, Engines, Rotors, Turbines, Braking, Damage, Dislocations
Proceedings Papers

Mission Performance Simulation of Integrated Helicopter–Engine Systems Using an Aeroelastic Rotor Model

Ioannis Goulos, Panos Giannakakis, Vassilios Pachidis, Pericles Pilidis
Proc. ASME. GT2013, Volume 2: Aircraft Engine; Coal, Biomass and Alternative Fuels; Cycle Innovations, V002T07A012, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94798
https://doi.org/10.1115/GT2013-94798
View Paper titled, Mission Performance Simulation of Integrated Helicopter–Engine Systems Using an Aeroelastic Rotor Model
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Topics: Engines, Rotors, Simulation, Flight, Aerodynamics, Blades, Design, Fuel consumption, Modeling, Aeroelasticity
Proceedings Papers

Rotorcraft Engine Cycle Optimization at Mission Level

Ioannis Goulos, Fabian Hempert, Vishal Sethi, Vassilios Pachidis, Roberto d’Ippolito, Massimo d’Auria
Proc. ASME. GT2013, Volume 2: Aircraft Engine; Coal, Biomass and Alternative Fuels; Cycle Innovations, V002T07A028, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95678
https://doi.org/10.1115/GT2013-95678
View Paper titled, Rotorcraft Engine Cycle Optimization at Mission Level
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Topics: Cycles, Engines, Optimization, Fuel consumption, Engine design, Corporate average fuel economy, Design, Fuel efficiency, Aerodynamics, Aeroelasticity
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

Helicopter Mission Analysis for a Regenerated Turboshaft

Ali Fakhre, Vassilios Pachidis, Ioannis Goulos, Mahmood Tashfeen, Pericles Pilidis
Proc. ASME. GT2013, Volume 2: Aircraft Engine; Coal, Biomass and Alternative Fuels; Cycle Innovations, V002T01A015, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94971
https://doi.org/10.1115/GT2013-94971
View Paper titled, Helicopter Mission Analysis for a Regenerated Turboshaft
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Topics: Combustion chambers, Compressors, Cycles, Design, Engines, Exhaust systems, Fuel consumption, Fuels, Heat exchangers, Heat transfer
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

A Parametric Numerical Study of the Effects of Inlet Swirl Distortion on a Transonic Compressor Stage

Taieb Ben Sghaier, Ahad Mehdi, Vassilios Pachidis, David MacManus
Proc. ASME. GT2013, Volume 6A: Turbomachinery, V06AT35A007, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94374
https://doi.org/10.1115/GT2013-94374
View Paper titled, A Parametric Numerical Study of the Effects of Inlet Swirl Distortion on a Transonic Compressor Stage
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Topics: Compressors, Flow (Dynamics), Vortices, Vortex flow, Aircraft engines, Computational fluid dynamics, Computer simulation, Engine design, Modeling, Pressure