128th CFD Seminar: Gradient-based shape Optimization in SU2: cost reduction techniques towards a more affordable adjoint-noise optimization
Speaker: Luca Abergo, Dipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano
Date: Tuesday, February 13, 2024
Time: 11:00am-12:00pm (EST)
Location: NIA, 1100 Exploration Way, Room 317 (3rd floor) or via Teams link
NIA CFD seminar website: https://niacfds.wordpress.com
POC: Hiro Nishikawa, hiro@nianet.org
Abstract
Adjoint-based optimization stands out as a pivotal feature of the SU2 open-source PDE-solver. However, its broader applicability has historically faced a significant challenge associated with a gradual degradation in grid quality during body deformation. This limitation prompts exploration into the introduction of an interpolation method for mesh deformation called RBF, which will be examined and compared to conventional techniques grounded in physical analogy. Additionally, we will delve into a stable framework based on a rotating reference frame for minimizing noise in UAM propellers, develop in synergy with the research group of Prof. Zhou (Bristol university), along with acknowledging its inherent limitations. In cases where a steady RRF is impractical, a hybrid harmonic balance-URANS approach can be employed to optimize quasi-periodic flows for a strong computational cost reduction for the framework. Furthermore, the discussion will extend to the potential application of harmonic balance (HB) for acoustic prediction, as well as its prospective role in blade optimization in the near future.
Bio
Luca Abergo, a Ph.D. student from Politecnico di Milano, is currently immersed in research focused on shape optimization, specifically targeting noise reduction in Urban Air Mobility (UAM) propellers. FSI impact in noise emission and mesh deformation methods are part of his actual research. His academic journey includes obtaining a master’s degree in Aeronautical Engineering, with a thesis conducted in collaboration with ‘Leonardo’. He boasts two years of hands-on experience in Formula SAE, showcasing his expertise in the world of automotive design. Erasmus experiences at IST Lisboa. He brings a unique dimension to his profile as a former professional sailor, having competed in five world championships.