Speaker: Mahmoud Gadalla

When: Thursday, 27 September 2018 
Time: 3:00 PM
Where: Room A-133, SISSA main campus, Via Bonomea

Title: Shape Optimization and Reduced Order Models for the 
Hydro-acoustic Design of Marine Propellers.

Abstract:

In the naval field it is of particular interest to find solutions for 
the reduction of hydro-acoustic noise due to the operation of marine 
propellers, in order to improve both on-board comfort and environmental 
impact during navigation. In this regard, the PRELICA project "Advanced 
Methodologies for Hydro-acoustic Design of Naval Propulsion" aims at 
reducing such emissions through an (i) accurate reconstruction of the 
fluid dynamic fields, (ii) efficient prediction of the radiated noise at 
all frequencies, (iii) optimal shape design of the marine propellers.

In this seminar, and after a brief introduction to the project, we 
present the tools developed for the parametric shape construction of 
marine propellers, as well as the conducted analysis using the Active 
Subspaces property to determine the influential geometrical parameters 
on the hydro-acoustic performance. After that we address the efforts 
done in the reduced order fashion, so as to reconstruct and predict the 
fluid dynamic and acoustic data through various  models, principally via 
the Dynamic Mode Decomposition and the Proper Orthogonal Decomposition 
with Interpolation and/or Galerkin projection. A final discussion 
towards the current findings and the future plans and perspectives are 
to be addressed.