MechE Colloquium: Numerical techniques for the analysis and control of flow instabilities in turbomachinery
Event details
| Date | 18.03.2025 |
| Hour | 12:00 › 13:00 |
| Speaker | Prof. Miguel Fosas de Pando, Department Ingeniería Mecánica y Diseño Industrial, University of Cádiz |
| Location | Online |
| Category | Conferences - Seminars |
| Event Language | English |
Abstract: The performance of turbomachinery is often constrained by the onset of flow instabilities such as surge or rotating stall. In this talk I outline a numerical framework designed for the analysis of these instabilities, their receptivity mechanisms, and their manipulation through optimization techniques. A linear stability analysis of flow through a representative linear cascade that incorporates the global interaction between blade passages is performed, and subsequently extended to rotor-stator configurations by introducing a novel time-accurate sliding plane that facilitates the computation of gradient information using the adjoint operator. This study reveals self-excited instability processes within a laminar separation bubble, at the trailing edge, and within the shear layers on both sides of the blade, in addition to cross-interaction between different blade passages of the rotor and stator cascades. Finally, a surrogate-based optimization technique incorporating gradient information, known as G-DYCORS, is presented and applied to the reduction of pressure-loss in linear cascades using wall actuation.
Biography: Miguel Fosas de Pando is an Associate Professor in Fluid Mechanics at the University of Cádiz. After graduating in Aerospace Engineering at the University of Seville (2009), he obtained PhD degree in Mechanical Engineering at Ecole Polytechnique (2012), where he also held a postdoctoral position. Following a David Crighton Fellowship at the University of Cambridge (2014), he joined the School of Engineering at the University of Cádiz. His research interests are computational fluid dynamics, numerical optimization and their applications in aeroacoustics and hydrodynamic stability.
Biography: Miguel Fosas de Pando is an Associate Professor in Fluid Mechanics at the University of Cádiz. After graduating in Aerospace Engineering at the University of Seville (2009), he obtained PhD degree in Mechanical Engineering at Ecole Polytechnique (2012), where he also held a postdoctoral position. Following a David Crighton Fellowship at the University of Cambridge (2014), he joined the School of Engineering at the University of Cádiz. His research interests are computational fluid dynamics, numerical optimization and their applications in aeroacoustics and hydrodynamic stability.
Practical information
- General public
- Free