Contact Dr Pavlos Zachos
- Tel: +44 (0) 1234 754633
- Email: p.zachos@cranfield.ac.uk
- ORCID
Areas of expertise
- Computational Fluid Dynamics
- Computing, Simulation & Modelling
- Gas Turbines & Propulsion
- Instrumentation, Sensors and Measurement Science
- Power Systems & Turbines
Background
Dr Pavlos Zachos is a Senior Lecturer in Propulsion System Aerodynamics within the Propulsion Engineering Centre. He is a Fellow of the Higher Education Academy, a Chartered Mechanical Engineer and member of the Institution of Mechanical Engineers. Dr Zachos holds a diploma in Mechanical Engineering from the Aristotle University of Thessaloniki, Greece. Before joining Cranfield, he worked within the Aerothermal Methods group at Rolls-Royce plc in Derby as a designer of turbine internal cooling passages and heat transfer optimisation for the Trent engine family.In 2007, he returned to academia to complete his PhD research at Cranfield University. He was awarded a doctorate in Gas Turbine Sub-idle Performance, Altitude Relight and Windmilling in 2010. Among many other prizes, he was awarded the Cranfield Kings Norton Medal for the university’s outstanding doctoral research in 2010.
Since 2010 Dr Zachos has led a number of research programmes in the areas of applied propulsion aerodynamics. His research interests cover a range of areas including experimental methods in aerodynamics, design and optimisation, advanced data analytics, machine learning in flow systems, computational fluid dynamics and instrumentation technology for flow measurements.
As part of his teaching activities, Dr Zachos is leading the Turbomachinery and Blade Cooling module which is part of the Thermal Power MSc programme delivered through the Propulsion Engineering Centre. He is also the course director of the Axial Compressor Design and Performance continuous professional development programme.
Dr Zachos is a member of the American Society of Mechanical Engineers (ASME), the American Institute of Aeronautics and Astronautics (AIAA) and the Royal Aeronautical Society (RAeS).
Dr Zachos is a member of the American Society of Mechanical Engineers (ASME), the American Institute of Aeronautics and Astronautics (AIAA) and the Royal Aeronautical Society (RAeS).
Current activities
- Experimental aerodynamics
- Measurement science and instrumentation
- Propulsion system integration
- Computational fluid dynamics
- Gas turbine aerothermal performance
- Novel propulsion concepts and design optimisation
- Thermal Power MSc - Turbomachinery and Blade Cooling (Module leader)
Clients
Rolls-Royce, AIRBUS, Samsung, DSTL
Publications
Articles In Journals
- Migliorini M, Zachos PK, MacManus DG & Haladuda P (2022) S-duct flow distortion with non-uniform inlet conditions, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, Available online 24 May 2022.
- Doll U, Migliorini M, Baikie J, Zachos PK, Röhle I, Melnikov S, Steinbock J, Dues M, Kapulla R, MacManus DG & Lawson NJ (2022) Non-intrusive flow diagnostics for unsteady inlet flow distortion measurements in novel aircraft architectures, Progress in Aerospace Sciences, 130 (April) Article No. 100810.
- Migliorini M, Zachos PK & MacManus DG (2022) Novel method for evaluating intake unsteady flow distortion, Journal of Propulsion and Power, 38 (1) 135-147.
- McLelland G, MacManus DG, Zachos PK, Gil-Prieto D & Migliorini M (2020) Influence of upstream total pressure profiles on S-duct intake flow distortion, Journal of Propulsion and Power, 36 (3) 346-356.
- Orts-Gonzalez PL, Zachos PK & Brighenti GD (2019) The impact of heat exchanger degradation on the performance of a humid air turbine system for power generation, Applied Thermal Engineering, 149 (February) 1492-1502. Dataset/s: 10.17862/cranfield.rd.7527542
- Orts-Gonzalez PL, Zachos PK & Brighenti GD (2018) Techno-economic analysis of a reheated humid air turbine, Applied Thermal Engineering, 137 (June) 545-554.
- Brighenti GD, Zachos PK & Orts-Gonzalez PL (2018) Part-load performance modelling of a reheated humid air turbine power cycle, Applied Thermal Engineering, 138 (June) 365-373.
- Gil-Prieto D, MacManus DG, Zachos PK & Bautista A (2018) Assessment methods for unsteady flow distortion in aero-engine intakes, Aerospace Science and Technology, 72 (January) 292-304.
- Brighenti GD, Vaishnavi-Seetherama V & Zachos P (2018) Advanced gas turbine cycle performance modelling using response surface methods, The Aeronautical Journal, 122 (1258) 1871-1883.
- D'Ambros A, Kipouros T, Zachos P, Savill M & Benini E (2018) Computational design optimization for S-ducts, Designs, 2 (4) Article No. 36.
- MacManus DG, Chiereghin N, Gil Prieto D & Zachos P (2017) Complex aeroengine intake ducts and dynamic distortion, AIAA Journal, 55 (7) 2395-2409.
- Zachos P, Frascella M, MacManus DG & Gil-Prieto D (2017) Pressure flowfield and inlet flow distortion metrics reconstruction from velocity data, AIAA Journal, 55 (9) 2929-2941.
- Tanguy G, Zachos P, MacManus DG, Gil-Prieto D & Garnier E (2017) Passive flow control study in an S-duct intake using stereo particle image velocimetry, AIAA Journal, 55 (6) 1862-1877.
- Gil-Prieto D, MacManus DG, Zachos PK, Tanguy G & Menzies KR (2017) Convoluted intake distortion measurements using stereo particle image velocimetry, AIAA Journal, 55 (6) 1878-1892.
- Gil-Prieto D, MacManus DG, Zachos PK, Tanguy G, Wilson F & Chiereghin N (2017) Delayed detached-eddy simulation and particle image velocimetry investigation of S-duct flow distortion, AIAA Journal, 55 (6) 1893-1908.
- Brighenti G, Orts-Gonzalez PL, Sanchez de Leon L & Zachos PK (2017) Design point performance and optimization of humid air turbine power plants, Applied Sciences, 7 (4) Article No. 413.
- Zachos P, MacManus D, Gil Prieto D & Chiereghin N (2016) Flow distortion measurements in convoluted aero engine intakes, AIAA Journal, 54 (9) 2819-2832.
- Zachos P (2013) Modelling and Analysis of Turbofan Engines Under Windmilling Conditions, Journal of Propulsion and Power, 29 (4) 882-890.
- Grech N, Koupper C, Zachos PK, Pachidis V & Singh R (2012) Considerations on the numerical modeling and performance of axial swirlers under relight conditions, Journal of Engineering for Gas Turbines and Power, 134 (11) Article No. 111505.
- Grech N, Mehdi A, Zachos PK, Pachidis V & Singh R (2012)
Effect of Combustor Geometry on Performance of Airblast Atomizer under Sub-Atmospheric Conditions
, Engineering Applications of Computational Fluid Mechanics, 6 (2) 203-213. - Zachos PK, Aslanidou I, Pachidis V & Singh R (2011) A Sub-idle Compressor Characteristic Generation Method With Enhanced Physical Background, Journal of Engineering for Gas Turbines and Power, 133 (8) 081702-1-081702-8.
- Terzis A, Zachos PK, Charnley B, Pachidis V & Kalfas AI (2011) On the applicability of oil and dye flow visualization technique during the design phase and operation of experimental rigs, Journal of Flow Visualization and Image Processing, 18 (3) 199-214.
- Zachos PK, Grech N, Charnley B, Pachidis V & Singh R (2011) Experimental and numerical investigation of a compressor cascade at highly negative incidence, Engineering Applications of Computational Fluid Mechanics, 5 (1) 26-36.
- Zachos PK, Pilidis P & Kalfas AI (2010) Analysis of turbine performance degradation effects due to geometry variations between actual components and design Intent, The Aeronautical Journal, 114 (1159) 569-578.
- Terzis A, Kazakos C, Papadopoulos N, Kalfas A, Zachos PK & Pilidis P (2010) Effects of swirl velocities from fan assemblies mounted on lifting surfaces, Journal of Engineering for Gas Turbines and Power, 133 (3) Article No. 031702.
- Zachos PK, Pappa M, Kalfas AI, Mansour G, Tsiafis I, Pilidis P, Hiroharu O & Watanabe E (2008) Turbine Blading Performance Evaluation Using Geometry Scanning and Flowfield Prediction Tools, Journal of Power and Energy Systems, 2 (6) 1345-1358.
Conference Papers
- Migliorini M, Zachos PK & MacManus (2019) The impact of inlet boundary layer thickness on the unsteady aerodynamics of S-duct intakes. In: AIAA Propulsion and Energy 2019 Forum, Indianapolis, 19-22 August 2019.
- Guerrero-Hurtado M, Zachos PK, MacManus DG, Migliorini M & Trapani G (2019) Unsteady swirl distortion characteristics for S-ducts using Lattice Boltzmann and time-resolved, stereo PIV methods. In: AIAA Propulsion and Energy 2019 Forum, Indianapolis, 19-22 August 2019.
- Migliorini M, Zachos PK & MacManus DG (2019) An assessment on the unsteady flow distortion generated by an S-duct intake. In: AIAA Propulsion and Energy 2019 Forum, Indianapolis, 19-22 August 2019.
- Zubizarreta J, Anselmi E, Zachos P & Pachidis V (2018) The impact of measurement uncertainty on heat exchanger performance measurements in a sCO2 test facility for power cycle applications. In: XXIV Biennial Symposium on Measuring Techniques in Turbomachinery, Prague, 29 August 2018 - 31 August 2019.
- Brighenti G, Anselmi E & Zachos P (2016) Parametric evaluation of S-CO2 Brayton cycles for bottoming applications. In: 1st European Seminar on Supercritical CO2 (sCO2) Power Systems, Vienna, 29-30 September 2016.
- Anselmi E, Zachos P, Collins R & Hassan M (2016) Development of an experimental S-CO2 loop for bottoming cycle applications. In: 1st European Seminar on Supercritical CO2 (sCO2) Power Systems, Vienna, 29-30 September 2016.
- Tanguy G, MacManus DG, Zachos P, Gilprieto D & Garnier E (2016) Passive flow control study in a convoluted intake using stereo particle image velocimetry. In: 34th AIAA Applied Aerodynamics Conference, 2016, Washington, 13-17 June 2016.
- Gil-Prieto D, MacManus DG, Zachos PK, Tanguy G, Wilson F & Chiereghin N (2016) Dynamic flow distortion investigation in an S-duct using DDES and SPIV data. In: 34th AIAA Applied Aerodynamics Conference, 2016, Washington, 13-17 June 2016.
- Zachos P, MacManus DG, Gilprieto D & Frascella M (2016) Pressure flow field and inlet flow distortion metrics reconstruction from velocity data. In: 34th AIAA Applied Aerodynamics Conference, 2016, Washington, 13-17 June 2016.
- Gil-Prieto D, Macmanus DG, Zachos PK, Tanguy G & Menzies KR (2016) Convoluted intake distortion measurements using stereo particle image velocimetry. In: 34th AIAA Applied Aerodynamics Conference, 2016, Washington, 13-17 June 2016.
- MacManus DG, Chiereghin N, Gil Prieto D & Zachos P (2015) Complex aero-engine intake ducts and dynamic distortion. In: 33rd AIAA Applied Aerodynamics Conference, Dallas, 22-26 June 2015.
- Zachos PK, MacManus DG & Chiereghin N (2015) Flow distortion measurements in convoluted aero engine intakes. In: 33rd AIAA Applied Aerodynamics Conference, Dallas, 22-26 June 2015.
- Doligalski A, Sanchez De Leon L, Zachos P & Pachidis V (2014) Assessing the potential of gas-recuperation in reheated gas turbines within combined gas-steam power plants. In: ASME Turbo Expo 2014: Turbine Technical Conference and Exposition (GT2014), Dusseldorf, 16-20 June 2014.
- De Leon LS, Zachos PK & Pachidis V (2013) A comparative assessment of dry gas turbine cycles for marine applications. In: ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, (GT2013), San Antonio, TX, 3-7 June 2013.
- Illana E, Grech N, Zachos PK & Pachidis V (2013) Axial compressor aerodynamics under sub-idle conditions. In: ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, (GT2013), San Antonio, TX, 3-7 June 2013.
- Lecoq M, Grech N, Zachos PK & Pachidis V (2013) Probabilistic and numerical modelling of a lobed mixer at windmilling conditions. In: ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, (GT2013), San Antonio, TX, 3-7 June 2013.
- Koupper C, Grech N, Zachos PK, Pachidis V & Singh R (2012) Considerations on the numerical modelling and performance of axial swirlers under relight conditions. In: ASME Turbo Expo 2012: Turbine Technical Conference and Exposition (GT2012), Copenhagen, 11-15 June 2012.
- Zachos PK, Ruelke C, Pachidis V & Singh R (2011) Compressor blade modelling under highly negative incidence. In: ASME Turbo Expo 2011: Turbine Technical Conference and Exposition (GT2011), Vancouver, BC, 6-10 June 2011.
- Ruelke C, Terzis A, Zachos PK, Pachidis V & Singh R (2010) Experimental evaluation and analytical modelling of the pressure loss through a compressor cascade operating at highly negative incidence. In: XX Biannual Symposium on Measuring Techniques in Turbomachinery, Transonic and Supersonic Flows in Cascades and Turbomachines, Milan, Italy, 29 September 2010.
- Aslanidou I, Zachos PK, Pachidis V & Singh R (2010) A physically enhanced method for sub-idle compressor map generation and representation. In: ASME Turbo Expo 2010: Power for Land, Sea, and Air (GT2010), Glasgow, Scotland, 14-18 June 2010.
- Terzis A, Kazakos Ch, Papadopoulos N, Zachos PK, Pilidis P & Kalfas AI (2010) The effect of the swirl velocity of a jet in cross flow typically used for turbine cooling applications. In: ASME Turbo Expo 2010:** power for land, sea, and air (GT2010), Glasgow, 14-18 June 2010.
- Laskaridis P & Zachos P (2009) Effects of engine parameters on secondary power extraction and evaluation of engine performance penalties. In: ISABE 2009: International Symposium for Air Breathing Engines, Montreal, Canada, 7-11 September 2009.
- Zachos PK, Pengue F, Pachidis V & Pilidis P (2009) Flowfield investigation of a compressor cascade at high incidence-part II: Numerical analysis.
- Zachos PK, Pachidis V, Charnley B & Pilidis P (2009) Flowfield investigation of a compressor cascade at high incidence-part I: Pneumatic probe measurements.
- Gallar L, Pachidis V, Zachos PK & Singh R (2009) Compressor IGV Off Design Performance and Loss Modelling. In: International Symposium for Air Breathing Engines (ISABE), 2009, Montreal, 7 September 2009.
- Kozaily J, Zachos PK, Pachidis V & Singh R (2009) Gas Turbine Fuel Atomisation Dynamics Under Sub-atmospheric Conditions. In: International Symposium for Air Breathing Engines (ISABE), 2009, Montreal, 7 September 2009.