Journal Articles

Taylor, M, Butcher, D, Crickmore, C, Walker, D (2024) Practical computational fluid dynamic predictions of a cyclist in a time trial position, Sports Engineering, ISSN: 1369-7072.

Spanelis, A, Denman, P, Mariah, I, Walker, D (2023) Experimental investigation of the effect of bleed on the aerodynamics of a low-pressure compressor stage in a turbofan engine, Journal of Turbomachinery, 146(3), 031013, ISSN: 0889-504X. DOI: 10.1115/1.4064084.

Barnes, J, Tuplin, S, Walker, D (2022) Flight dynamics of ski jumping: Wind tunnel testing and numerical modelling to optimise flight position, Proceedings of the Institution of Mechanical Engineers Part P: Journal of Sports Engineering and Technology, ISSN: 1754-3371. DOI: 10.1177/17543371221111625.

Spanelis, A and Walker, D (2022) A multi-objective factorial design methodology for aerodynamic off-takes and ducts, Aerospace, 9(3), 130, DOI: 10.3390/aerospace9030130.

Tsakmakidou, D, Mariah, I, Walker, D, Hall, C, Simpson, H (2021) Experimental investigation of secondary flows and length reduction for a low-pressure compressor transition duct, Journal of Engineering for Gas Turbines and Power, 144(1), 011017, ISSN: 0742-4795. DOI: 10.1115/1.4052086.

Spanelis, A and Walker, D (2021) Aerodynamic influence of a bleed on the last stage of a low-pressure compressor and S-duct, Journal of Turbomachinery, 144(2), 021007, ISSN: 0889-504X. DOI: 10.1115/1.4052134.

Walker, D, Mariah, I, Hall, C (2021) An experimental, aerodynamic evaluation of design choices for a low-pressure compressor transition duct, Journal of Turbomachinery, 143(9), 091004, ISSN: 0889-504X. DOI: 10.1115/1.4050598.

Walker, D, Mariah, I, Tsakmakidou, D, Vadhvana, H, Hall, C (2019) The influence of fan root flow on the aerodynamic of a low-pressure compressor transition duct, Journal of Turbomachinery, 142(1), 011002, ISSN: 0889-504X. DOI: 10.1115/1.4045272.

Walker, A and Rajaratnam, LE (Accepted for publication) Investigation of Wheelhouse Flow Interaction and the Influence of Lateral Wheel Displacement, Energies, ISSN: 1996-1073.

Walker, D, Koli, BR, Beecroft, P (2019) Influence of purge flow swirl at exit to the high-pressure compressor on OGV/pre-diffuser and combustion system aerodynamics, Journal of Turbomachinery, 141(9), ISSN: 0889-504X. DOI: 10.1115/1.4043781.

Li, Y, Walker, D, Irving, J (2018) Improved modelling capabilities of the airflow within turbine case cooling systems using smart porous media, Journal of Engineering for Gas Turbines and Power, 141(5), ISSN: 0742-4795. DOI: 10.1115/1.4041933.

Almond, M, Render, PM, Walker, AD, Howlett, A (2017) Investigation of the Flowfield Induced by Simulated Battle Damage, The Aeronautical Journal, 121(1243), pp.1296-1318, ISSN: 0001-9240. DOI: 10.1017/aer.2017.58.

Duncan Walker, A, Koli, B, Guo, L, Beecroft, P, Zedda, M (2017) Impact of a Cooled Cooling Air System on the External Aerodynamics of a Gas Turbine Combustion System, Journal of Engineering for Gas Turbines and Power, 139(5), pp.051504-051504, ISSN: 0742-4795. DOI: 10.1115/1.4035228.

Ford, CL, Carrotte, JF, Walker, AD (2013) The Application of Porous Media to Simulate the Upstream Effects of Gas Turbine Injector Swirl Vanes, Computers and Fluids, 77, pp.143-151.

Carrotte, JF, Ford, CL, Walker, AD (2012) The Impact of Compressor Exit conditions on Fuel injector Flows, Journal of Engineering for Gas Turbines and Power: Transactions of the ASME, 134(11), ISSN: 1528-8919. DOI: 10.1115/1.4007025.

Walker, AD, Regunath, GS, Carrotte, JF, Denman, PA (2012) Intercooled Aero-Gas-Turbine Duct Aerodynamics: Core Air Delivery Ducts, Journal of Propulsion and Power, 28(6), pp.1188-1200, ISSN: 0748-4658. DOI: 10.2514/1.60566.

Walker, AD, Barker, AG, Carrotte, JF, Bolger, JJ, Green, MJ (2012) Integrated Outlet Guide Vane Design for an Aggressive S-Shaped Compressor Transition Duct, Journal of Turbomachinery, 135(1), ISSN: 0889-504X. DOI: 10.1115/1.4006331.

Walker, AD, Regunath, GS, Carrotte, JF, Denman, PA (2012) Intercooled aero-gas-turbine duct aerodynamics: Core air delivery ducts, Journal of Propulsion and Power, 28(6), pp.1188-1200, ISSN: 0748-4658. DOI: 10.2514/1.B34450.

Ford, CL, Carrotte, JF, Walker, AD (2012) The impact of compressor exit conditions on fuel injector flows, Proceedings of the ASME Turbo Expo, 8(PARTS A, B, AND C), pp.1667-1677, DOI: 10.1115/1.4007025.

Walker, AD, Barker, AG, Carrotte, JF (2011) Numerical design and experimental evaluation of an aggressive S-shaped compressor transition duct with bleed, Proceedings of the ASME Turbo Expo, 7(PARTS A, B, AND C), pp.151-161, DOI: 10.1115/GT2011-45628.

A'Barrow, C, Carrotte, JF, Walker, AD, Rolt, AM (2011) Aerodynamic performance of a coolant flow off-take downstream of an OGV, Proceedings of the ASME Turbo Expo, 7(PARTS A, B, AND C), pp.187-199, DOI: 10.1115/GT2011-45888.

Walker, AD, Carrotte, JF, Denman, PA (2011) The Design of Annular Diffusers with Large Downstream Blockage Effects for Gas Turbine Applications, AIAA Journal of Propulsion and Power, 27(6), pp.1218-1230, ISSN: 0748-4658.

Walker, AD, Carrotte, JF, Denman, PA (2011) Annular Diffusers with Large Downstream Blockage Effects for Gas Turbine Combustion Applications, Journal of Propulsion and Power, 27(6), pp.1218-1231, ISSN: 0748-4658. DOI: 10.2514/1.56386.

Walker, AD, Carrotte, JF, McGuirk, JJ (2009) The Influence of Dump Gap on External Combustor Aerodynamics at High Fuel Injector Flow Rates, ASME Journal of Engineering for Gas Turbines and Power, 131(3), DOI: 10.1115/1.3028230.

Walker, AD, Carrotte, JF, McGuirk, JJ (2008) The influence of dump gap on external combustor aerodynamics at high fuel injector flow rates, Proceedings of the ASME Turbo Expo, 6(PART B), DOI: 10.1115/GT2008-50271.

Walker, AD, Carrotte, JF, McGuirk, JJ (2008) Compressor/Diffuser/Combustor Aerodynamic Interactions in Lean Module Combustors, ASME Journal of Engineering for Gas Turbines and Power, 130(1).

Walker, AD, Carrotte, JF, McGuirk, JJ (2007) Enhanced External Aerodynamic Performance of a Generic Combustor Using an Integrated OGV/Prediffuser Design Technique, ASME Journal of Engineering for Gas Turbines and Power, 129(1), pp.80-87, ISSN: 0742-4795. DOI: 10.1115/1.2364008.

Walker, AD and Denman, PA (2005) Hybrid Diffusers for Radially Staged Combustion Systems, AIAA Journal of Propulsion and Power, 21(2), pp.264-273, ISSN: 0748-4658.

Walker, AD, Denman, PA, McGuirk, JJ (2004) Experimental and Computational Study of Hybrid Diffusers for Gas Turbine Combustors, ASME Journal of Engineering for Gas Turbines and Power, 126(4), pp.717-725, ISSN: 0742-4795. DOI: 10.1115/1.1772403.

Conferences

Spanelis, A, Denman, P, Mariah, I, Walker, D (2023) Experimental investigation of the effect of bleed on the aerodynamics of a low-pressure compressor stage in a turbofan engine [GT2023-102260]. In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition (GT2023); Proceedings of the ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, Boston, Massachusetts, USA,ISBN: 9780791887103. DOI: 10.1115/GT2023-102260.

Veyrat, A, Carrotte, J, Walker, D, Simpson, H (2023) A toolbox for the preliminary aerodynamic design of highly loaded annular S-shaped transition ducts [GT2023-102234]. In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition (GT2023); Proceedings of the ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, Boston, Massachusetts, USA,ISBN: 9780791887103. DOI: 10.1115/GT2023-102234.

van Bruygom, A, Garmory, A, Walker, D (2023) Towards best practice for predicting a lifted hydrogen diffusion flame using a flamelet generated manifold approach [GT2023-102250]. In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition (GT2023); Proceedings of the ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, Boston, Massachusetts, USA,ISBN: 9780791886953. DOI: 10.1115/GT2023-102250.

Veyrat, A, Carrotte, J, Walker, D, Hall, C, Simpson, H (2021) A rapid viscous-inviscid interaction method for the preliminary design of s-shaped transition ducts. In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition; Proceedings of the ASME Turbo Expo, Virtual Conference,ISBN: 9780791884928. DOI: 10.1115/GT2021-59515.

Tsakmakidou, D, Mariah, I, Walker, D, Hall, C, Simpson, H (2021) Experimental investigation of secondary flows and length reduction for a low-pressure compressor transition duct. In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition; Proceedings of the ASME Turbo Expo, Virtual Conference.,ISBN: 9780791884928. DOI: 10.1115/GT2021-58879.

Butcher, D, Gillespie, J, Walker, D, Lowe, KT, Spencer, A (2020) Modification of the Internal Flows of Thermal Propulsion Systems Using Local Aerodynamic Inserts. In SAE Powertrains, Fuels & Lubricants Meeting; SAE Technical Papers,, DOI: 10.4271/2020-01-2039.

Walker, A, Mariah, I, Hall, C (Accepted for publication) An Experimental, Aerodynamic Evaluation of Design Choices for a Low-Pressure Compressor Transition Duct, GT2020-16067. In ASME International Gas Turbine Institute Turbo Expo 2020, London.

Walker, A, Tsakmakidou, D, Hall, C (Accepted for publication) A Numerical Investigation Into Secondary Flows at Inlet to a Low-Pressure Compressor Transition Duct, GT2020-16065. In ASME International Gas Turbine Institute Turbo Expo 2020, London.

Walker, D, Mariah, I, Tsakmakidou, D, Vadhvana, H, Hal, C (2019) The influence of fan root flow on the aerodynamics of a low-pressure compressor transition duct. In Proceedings of ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition (GT2019), Pheonix, Arizona, USA,ISBN: 9780791858561. DOI: 10.1115/GT2019-92048.

Li, Y-L, Denman, P, Walker, D (2019) The influence of geometric and aerodynamics boundary conditions on fuel injector feed and external aerodynamics for lean burn combustors. In Proceedings of ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition (GT2019), Phoenix, Arizona, USA,ISBN: 9780791858622. DOI: 10.1115/GT2019-92037.

Peyton-Bruhl, A, Belton, D, Walker, D, Snowsill, G, Young, C (2019) Development of a CFD based methodology for predicting oil auto-ignition in gas turbine bearing chambers. In ASME International Gas Turbine and Aeroengine Congress and Exposition; Proceedings of ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition (GT2019), Phoenix, Arizona, USA,ISBN: 9780791858653. DOI: 10.1115/GT2019-92050.

Walker, AD and Rajaratnam, E (2019) Experimental and computational study of the flow around a stationary and rotating isolated wheel and the influence of a moving ground plane. In SAE World Congress Experience, SAE International, Detroit, USA. DOI: 10.4271/2019-01-0647.

Williams, MA, Carrotte, JF, Moran, AJ, Walker, AD (2018) Impact of upstream boundary conditions on fuel injector performance in a low trl reacting flow experimental facility. In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, Proceedings of the ASME Turbo Expo, Oslo, Norway,ISBN: 9780791851050. DOI: 10.1115/GT201875621.

Walker, D, Koli, BR, Beecroft, P (2017) Preliminary investigation into the effects of a compressor rim purge flow on OGV/pre-diffuser and combustion system aerodynamics. In , Charlotte, NC, USA,ISBN: 9780791850794. DOI: 10.1115/GT2017-63962.

Spanelis, A, Walker, D, Beecroft, P (2017) The aerodynamic design of the low pressure air delivery ducts for a cooled cooling air system. In , Charlotte, North Carolina, USA,ISBN: 9780791850794. DOI: 10.1115/GT2017-63959.

Walker, D, Koli, BR, Spanelis, A, Beecroft, P (2017) Aerodynamic design of a cooled cooling air system for an aero gas turbine. In The 23rd International Symposium on Air Breathing Engines (ISABE), Manchester, UK.

Elango, P and Walker, D (2016) An investigation of flush off-takes for use in a cooled cooling air system. In Royal Aeronautical Society Applied Aerodynamics Conference, Bristol, UK.

Walker, D, Wallin, F, Bergstedt, R, Peacock, G (2015) Aerodesign and validation of turning struts for an intermediate compressor duct. In The 22nd International Symposium on Air Breathing Engines (ISABE), Pheonic, AZ, USA.

Walker, D and Guo, L (2015) Impact of a cooled cooling air installation on the external aerodynamics of a gas turbine combustion system. In Proceedings of ASME Turbo Expo, Montreal, Canada,ISBN: 9780791856697. DOI: 10.1115/GT2015-43186.

Almond, M, Render, P, Walker, D (2015) Analysis of single hole simulated battle damage on a wing using particle image velocimetry. In 33rd AIAA Applied Aerodynamics Conference, Dallas, TX, USA,ISBN: 9781624103636. DOI: 10.2514/6.2015-2573.

Walker, D, Barker, A, Mariah, I, Peacock, G, Carrotte, J, Northall, RM (2014) An aggressive S-shaped compressor transition duct with swirling flow and aerodynamic lifting struts. In Proceedings of the ASME Turbo Expo,, ISBN: 9780791845608. DOI: 10.1115/GT2014-25844.

Walker, AD, Carrotte, JF, Peacock, GL, Spencer, A, McGuirk, JJ (2013) Experimental study of the unsteady aerodynamics the compressor-combustor interface of a lean burn combustion system. In , 49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference.

Walker, AD, Ford, CL, Carrotte, JF (2012) The Impact of Compressor Exit Conditions on Fuel Injector Flows. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT-2012-68918, Copenhagen, Denmark.

Walker, AD, Regunath, GS, Carrotte, JF, Rolt, AM (2011) Aerodynamic Design of the Core Duct System for an Intercooled Aero Engine. In 20th International Society for Airbreathing Engines Conference, Paper No. 2011-1256, Gothenburg, Sweeden.

Walker, AD, A'Barrow, CR, Carrotte, JF, Rolt, AM (2011) Aerodynamic Design of the Cooling Flow Duct System for an Intercooled Aero Engine. In 20th International Society for Airbreathing Engines Conference, Paper No. 2011-1257, Gothenbug, Sweden.

A'Barrow, CR, Carrotte, JF, Walker, AD, Rolt, A (2011) Aerodynamic Performance of a Coolant Flow Off-Take Downstream of an OGV. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT2011-45888, Vancouver, Canada, pp.1-10.

Walker, AD, Barker, AG, Carrotte, JF (2011) Numerical Design and Experimental Evaluation of an Aggressive S-shaped Compressor Transition Duct with Bleed. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT2011-45628, Vancouver, Canada, pp.1-10.

Walker, AD, Barker, AG, Carrotte, JF, Bolger, JJ, Green, MJ (2011) Integrated OGV Design for an Aggressive S-shaped Compressor Transition Duct. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT2011-45627, Vancouver, Canada.

Walker, AD, Carrotte, JF, Rolt, AM (2009) Duct Aerodynamics for Intercooled Aero Gas Turbines: Constraints, Concepts and Design Methodology. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT2009-59612, Orlando, USA.

Walker, AD, Carrotte, JF, McGuirk, JJ (2008) The Influence of Dump Gap on External Combustor Aerodynamics at High Fuel Injector Flow Rates. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT-2008-50271, Berlin, Germany.

Walker, AD, Carrotte, JF, McGuirk, JJ (2007) Compressor/Diffuser/Combustor Aerodynamic Interactions in Lean Module Combustors. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT-2007-27872, Montreal, Canada.

Walker, AD, Carrotte, JF, McGuirk, JJ (2006) Enhanced External Aerodynamic Performance of a Generic Combustor Using an Integrated OGV/Pre-Diffuser Design Technique. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT-2006-90184, Barcelona, Spain.

Duncan Walker, A, Denman, PA, McGuirk, JJ (2003) Experimental and computational study of hybrid diffusers for gas turbine combustors. In , American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI, pp.311-320, DOI: 10.1115/GT2003-38406.

Walker, AD, Denman, PA, McGuirk, JJ (2003) Experimental and Computational Study of Hybrid Diffusers for Gas Turbine Combustors. In Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition, Paper No. GT-2003-38406, Atlanta, USA.

Patents

Walker, A, Beecroft, PA, Armstrong, M, Koil, BR (2019) Cooling System.

Walker, A, Mariah, I, Carrotte, J, Northall, R, Rae, A, Krautheim, M (2018) Gas Turbine Engine Vanes.

Walker, A, Mariah, I, Carrotte, J, Northall, R, Rae, A, Krautheim, M (2018) Gas Turbine Engine Vanes.

Walker, AD, Ford, CL, Barker, AG, carrotte, JF (2015) Airblast Fuel Injector.

Walker, AD, Ford, CL, Carrotte, JF, Moran, AJ (2014) FUEL INJECTOR AND A GAS TURBINE ENGINE COMBUSTION CHAMBER.

Walker, AD and Denman, PA (2009) Diffuser Arrangement, EU Patent, EP 1431516 B1.

Walker, AD and Denman, PA (2006) Diffuser Arrangement, UK Patent, GB 0229307.4.

Walker, AD and denman, PA (2006) Diffuser Arrangement, US Patent, US7062918B2.

Walker, AD and Denman, PA (2006) A Diffuser Arrangement.

Walker, AD and Denman, PA (2004) Improved Bled Diffuser for GTE Combustors.

Thesis/Dissertation

Walker, AD (2002) Experimental and Computational Study of Hybrid Diffusers for Gas Turbine Combustors.