Assessment of low‐frequency aeroacoustic emissions of a wind turbine under rapidly changing wind conditions based on an aero‐servo‐elastic CFD simulation

Wind Turbine Performance Under Icing Conditions

Department of Aeronautical and Astronautical Engineering, University of Illinois at Urbana-Champaign, 306 Talbot Laboratory, 104 S. Wright Street Urbana. IL 61801-2935 The effects of rime ice on horizontal axis wind turbine performance were estimated. For typzcal supercooled fog conditions found in cold northern regions, four rime ice accretwns on the 5809 wmd turbine airfoil were predicted usi...

Effects of gain-scheduling methods in a classical wind turbine controller on wind turbine aeroservoelastic modes and loads

CFD Simulation of High-speed Trains: Train-induced Wind Conditions on Trackside Installations

Speed is the created air flow as well as slipstream effects as the trains move. These effects can have some level of impact on fuel and energy efficiency  of  the  train,  but  their  other  important  outcome  is  the emergence of turbulent flows at higher speeds which can cause aerodynamic  drag  forces  followed  by  noise  and  vibration.  Thus, slipstream effects have significant importanc...

A New Method to Study Aggregation Effect of Harmonic Current Emissions in a Wind Farm Based on Type-III Wind Turbine Average Modeling

Assessment of complex harmonic current contribution of each wind turbines at connection point of a wind farm to the grid (primary emission) is presented in this paper. Moreover, contribution of grid background harmonic voltage distortion on harmonic current distortion (secondary emission) of each turbine is also evaluated. Both assessments are represented based on primary and secondary transfer...

An Investigation on Performance of Shrouding a Small Wind Turbine with a Simple Ring in a Wind Tunnel

Ducted wind turbines are a kind of small wind turbine having a diffuser or any other shape around the rotor which increases the air flow through the blades and absorbs more power. In the present study, a small wind turbine was ducted with a relatively simple ring and its performance was investigated in a wind tunnel. The duct is shaped using rolling steel sheets on a sloping surface and finally...