Aeronautical and Automotive Engineering


Dr Alan Veyrat-Charvillon

Photo of Dr Alan Veyrat-Charvillon

KTP Associate in Transition Duct Aerodynamic Design

Current positions:

  • PhD candidate in Gas Turbine Aerodynamics (Final year, CDT sponsored by Rolls-Royce plc. and EPSRC)
  • KTP associate in transition duct aerodynamic design (since 09/2021)


  • Fundamental research for the computation of the aerodynamic flow field in S-shaped transition ducts in aero-engines

2016 - present

  • MRes (1st) + PhD in Gas Turbine Aerodynamics [1+3]
    • University of Cambridge (Cambridge, UK)
    • Loughborough University (Loughborough, UK)


Preliminary Aerodynamic Design of Highly Loaded S-shaped Ducts by Viscous Inviscid Interaction Method

2012 - 2014

  • MSc in High Speed Fluid Dynamics
    • Kyushu Institute of Technology (Kitakyushu, Japan)
    • Project: Two-dimensional CFD-LES simulation of the propagation of detonation waves in H2/air mixture

2010 - 2012

  • MEng in Mechanical Engineering
    • Ecole Nationale Supérieure des Mines de Nancy, GIP-InSIC (Saint Dié des Vosges, France)


Industrial design, CAD and rapid prototyping

Research Group:

  • Applied Aerodynamics

Research Interests:

  • Potential Flow Theory,
  • Boundary Layer Theory,
  • Turbulence Modelling and
  • Computational Geometry.

Development of an application for the preliminary design of annular S-shaped transition ducts in aero-engines.

Amongst other capabilities, the duct tool can rapidly generate aerodynamic and performance predictions by viscous-inviscid interactions (VII). The method involves the computation of an equivalent inviscid core flow coupled to the semi-empirical development of turbulent boundary layers subjected to pressure gradients and curvature effects. This last module is supplemented by a Gaussian regression technique (Kriging) to calibrate the turbulence effects against reference data.

Parametric splines are intensively used to feed the calculations with high-quality data, and to produce versatile yet robust geometries.

Thanks to its general formulation, the VII method of the duct tool is applicable to curved flows with thick boundary layers where turbulent effects are significant such as in compressors, turbines, and intakes of aero-engines.

An extension for dealing with the three-dimensional flow field of strutted S-shaped ducts has also been developed.

A. Veyrat, J. F. Carrotte, A. D. Walker, C. Hall, and H. Simpson, “A Rapid Viscous-Inviscid Interaction Method for the Preliminary Design of S-Shaped Transition Ducts”, Proc. ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition, GT2021-59515, Virtual, Online, Jun. 2021.