Experimental comparison of a wind-turbine and of an actuator-disc near wake

The actuator disc (AD) model is commonly used to simplify the simulation of horizontal-axis wind-turbine aerodynamics. The limitations of this approach in reproducing the wake losses in wind farm simulations have been proven by a previous research. The present study is aimed at providing an experimental analysis of the near-wake turbulent flow...

On the Turbulent Mixing in Horizontal Axis Wind Turbine Wakes

The wake flow of a horizontal axis wind turbine is characterised by lower wind speed and higher turbulence than the free-stream conditions. When clustered in large wind farms, wind turbines regularly operate inside the wake of one or more upstream machines. This is a major cause of energy production loss and a source of higher fatigue loads on...

Wind turbine and actuator disc wake: Two experimental campaigns

The present paper is the summary of 3 years of research on the wake aerodynamics of horizontal axis wind turbine at Delft University of Technology, the Netherlands. In particular, the main results and the conclusions of two experimental campaigns are collected. The underlying research question is: how do the near-wake turbulent flow structures...

Enhanced Kinetic Energy Entrainment in Wind FarmWakes: LES Study of a Wind Turbine Array with Tethered Kites

Shape morphing wind-responsive facade systems realized with smart materials

This paper presents the opportunity to exploit the kinetic adaptation of the façade skin-roughness for enhancing the air-flow related characteristic of high-rise buildings. A conceptual design solution, in which the roughness adaptation is achieved by means of innovative shape changing materials, will be presented. Roughness elements located on...