Large eddy simulation of a marine turbine in a stable stratified flow condition

Abstract

power performance of a marine current turbine under a free surface through a nite volume solver coupled with immersed boundary method. Two free surface methods have been applied and validated. Then the power coecient at dierent tip speed ratios was calculated and the results compared with reference experimental data exhibiting a general good agreement. Noruzi et al. [3] carried out a numerical simulations by means of Reynolds-averaged Navier-Stokes (RANS) with and without gravity waves and the results were compared to experimental data. The results showed that when the ratio between the installation depth and the total depth of the domain is below a critical value, the installation depth of the rotor inuences the performance of the turbine. A few studies concern the investigation of power performance of turbines arrays. Mycek et al. [4] carried out an experimental and numerical study both for a single turbine and for two turbines. A three-dimensional software was employed based on a Lagrangian vortex particle method for numerical

Modelling a Moving Propeller System in a Stratified Fluid Using OpenFOAM

“…Furthermore, this numerical study only considers a single value of the Brunt-Väisälä frequency and Froude number, rather than a range of values. The model, once sufficiently validated, could potentially be applied at a larger scale to understand the collapse of mixed patches generated by underwater bluff bodies [7] or marine power turbines [27], for example.…”

Energy absorption characteristics in hybrid composite materials for marine applications under impact loading: Case of tidal current turbine

“…Several types of turbines have been conceived, but the most commonly used are horizontal‐axis turbines with two‐ or three‐blade rotors able to extract a great quantity of energy from marine currents 7 . Even though research on tidal turbines treats many different fields of interest, the most frequently studied subject is certainly power performance 8 …”

“…7 Even though research on tidal turbines treats many different fields of interest, the most frequently studied subject is certainly power performance. 8 The ducted tidal turbine is subject to particular constraints because of the aggressive conditions that reign in the marine environment and maintenance and installation phase. In this context, composite materials occupy a crucial place in developing systems to convert marine renewable energy under severe environmental conditions.…”