Since wind turbines placed in farms need to minimize their footprint on the ground, effects of wake must be considered. Placement optimization, turbine spacing, and direction rotation are known affect performance vertical-axis (VAWTs). However, rigorous numerical modeling methodologies that investigate influence these characteristics lacking, especially case large turbines. The goal this study ...

Wind turbine wake redirection drawn by a yaw control has been proposed as strategy to improve the performance of wind farms. However, characteristics and development curled structure deformed action rotor are not well understood. In present study, behind imparted with various angles subjected uniform inflow was investigated using large-eddy simulation. The NREL 5MW reference modeled an actuator...

The land use limitations, especially for onshore applications, have led modern Wind Turbines (WTs) to be aggregated in wind parks under the scope of minimizing necessary area required. Within this framework, trustworthy prediction speed deficiency downstream WTs' hub (known also as “ wake effect ”) and meticulous park micrositing are uppermost importance optimized WTs siting across available ar...

A brief review of the literature is provided on the characteristics of marine currents and the approaches used for simulating tidal turbines. The feasibility of using CFD models to simulate time-dependent turbulent flow around a tidal turbine is then explored. Two different approaches for specifying the structure of the turbulent inflow conditions in CFD models are compared: the von Kármán spec...

Annoyance, recognition and detection of noise from a single wind turbine were studied by means of a two-stage listening experiment with 50 participants with normal hearing abilities. In-situ recordings made at close distance from a 1.8-MW wind turbine operating at 22 rpm were mixed with road traffic noise, and processed to simulate indoor sound pressure levels at LAeq 40 dBA. In a first part, w...

in this study, the time-average velocity in the near wake of a two-dimensional notch-back car model that located in the wake of a trailer has been investigated. the present experiments were carried out in an open circuit low-speed wind tunnel made by fara sanjesh saba ltd, in iran and was used to simulate uniform air flow. results show: at the close spacing, time- average velocity profile at th...