In this paper, we propose a Simulation-Based Design Optimization (SBDO) approach for the design of a Pre-Duct type Energy Saving Device (ESD). Pre-Ducts reduce the wake losses, contribute to a better interactions between the propeller and the hull and generate, in the end, generate an additional thrust. An integrated design approach, based on a parametric description of the duct geometry and on RANSE calculations together managed by an optimization algorithm, is developed to this aim, i.e. to maximize the thrust delivered by a Wake Equalizing Duct (WED). The Japan Bulk Carrier test case, for which experimental data regarding the effectiveness of WED is available in the literature, is considered as a reference. Results from the design activity show sensible improvements of the overall propulsive efficiency when the Pre-Duct design is tailored to the actual hull wake shape thanks to the flexibility provided by the fully automated design approach proposed in this paper.
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|Titolo:||Duct-type ESD: a design application using RANSE-based SBDO|
|Data di pubblicazione:||2019|
|Appare nelle tipologie:||04.01 - Contributo in atti di convegno|