Cerca nel sito per parola chiave

pubblicazioni - Memoria

Optimization of the Wavesax device: numerical modelling and ocean wave basin tests

pubblicazioni - Memoria

Optimization of the Wavesax device: numerical modelling and ocean wave basin tests

Preliminarmente è stato studiato un modello numerico della componente fissa del dispositivo, utilizzando analisi di fluidodinamica computazionale (Computational Fluid Dynamics, RANS-CFD model) e considerando quattro tipi di onda regolare che sono condizioni tipiche del mar Mediterraneo. Inoltre è stata effettuata l’ottimizzazione del disegno del dispositivo. L’analisi del modello in scala è stata eseguita utilizzando una vasca oceanica di laboratorio e considerando differenti condizioni d’onda. Il modello numerico è stato calibrato e validato confrontando i risultati ottenuti con quelli delle prove sperimentali.

The Wavesax device has been conceived to be installed in ports and harbours, in the Mediterranean sea. Therefore, two aspects are quite important: flexibility of the device to fit in different structural configurations and replication in a large number of units.Preliminary numerical modelling of the fixed component of the device, has been performed using Computational Fluid Dynamics analysis (RANS-CFD model) and considering four regular wave conditions typical of the Mediterranean sea.

Main issues to be considered in the first stage scale modelling analysis are the effective functionality of the device conception (scale 1:20), the optimization of the design and position of the device in terms of generated velocity gradients in the working section where the turbine blades are installed. The main parameters to be investigated, both with numerical modelling and ocean wave basin tests, are the pressure field in different sections of the device, water levels for different wave conditions and device sinking.

Following the scale model test, the numerical model was calibrated and validated it comparing to the results of the experimental tests, in order to perform additional analysis, such as the behaviour of a Well runner, working with bi-directional flows, in periodic stationary regimes. The paper presents the results of the numerical simulations related to different configurations of the device, under typical Mediterranean wave climates.

Progetti

Commenti