In this article, we propose a shape optimization pipeline for propeller blades, applied to naval applications. The geometrical features of a blade are exploited to parametrize it, allowing to obtain deformed blades by perturbating their parameters. The optimization is performed using a genetic algorithm that exploits the computational speed-up of reduced order models to maximize the efficiency of a given propeller. A standard offline-online procedure is exploited to construct the reduced-order model. In an expensive offline phase, the full order model, which reproduces an openwater test, is set up in the open-source software Open-FOAM and the same full order setting is used to run the CFD simulations for all the deformed propellers. The collected high-fidelity snapshots and the deformed parameters are used in the online stage to build the nonintrusive reduced-order model. This article provides a proof of concept of the pipeline proposed, where the optimized propeller improves the efficiency of the original propeller.

A shape optimization pipeline for marine propellers by means of reduced order modeling techniques / Ivagnes, Anna; Demo, Nicola; Rozza, Gianluigi. - In: INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING. - ISSN 1097-0207. - 125:7(2024), pp. 1-22. [10.1002/nme.7426]

A shape optimization pipeline for marine propellers by means of reduced order modeling techniques

Anna Ivagnes;Nicola Demo;Gianluigi Rozza
2024-01-01

Abstract

In this article, we propose a shape optimization pipeline for propeller blades, applied to naval applications. The geometrical features of a blade are exploited to parametrize it, allowing to obtain deformed blades by perturbating their parameters. The optimization is performed using a genetic algorithm that exploits the computational speed-up of reduced order models to maximize the efficiency of a given propeller. A standard offline-online procedure is exploited to construct the reduced-order model. In an expensive offline phase, the full order model, which reproduces an openwater test, is set up in the open-source software Open-FOAM and the same full order setting is used to run the CFD simulations for all the deformed propellers. The collected high-fidelity snapshots and the deformed parameters are used in the online stage to build the nonintrusive reduced-order model. This article provides a proof of concept of the pipeline proposed, where the optimized propeller improves the efficiency of the original propeller.
2024
125
7
1
22
e7426
10.1002/nme.7426
https://arxiv.org/abs/2305.07515
Ivagnes, Anna; Demo, Nicola; Rozza, Gianluigi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/139911
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