معرفی
Dr. Demetrios Lefas is a Royal Academy of Engineering (RAEng) Research Fellow at the Whittle Laboratory, University of Cambridge, and a Fellow of Gonville & Caius College. His research focuses on aeroelastic instabilities in jet engines, particularly at the intersection of aerodynamics and mechanical vibrations. Collaborating closely with Rolls-Royce and serving as a Visiting Research Fellow at Imperial College London, his work addresses critical design limitations in transonic compressors to enable ultra-efficient engines for net-zero carbon transitions.
His research interests include:
- Aerodynamic design of transonic compressors and fans
- Shock-boundary layer interaction dynamics
- Spanwise flow redistribution in blade passages
- Computational fluid dynamics (CFD) applications in turbomachinery
- Blade geometry optimization for efficiency and operability
- Three-dimensional flow field analysis in compressors
Key scientific contributions involve:
- Developing aerodynamically balanced transonic compressor rotors
- Identifying transonic relief mechanisms in blade design
- Establishing area ratio (At/A1) as a critical design parameter
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