Abstract Vertical Axis Wind Turbines (VAWTs) have attracted considerable attention in
recent years due to their potential for harvesting wind energy in urban areas and low wind …

Omnidirectionality and simple design make VAWTs more attractive compared to HAWTs in
highly turbulent and harsh operational environments including low wind speed conditions …

Efficiency enhancement and noise reduction are the two critical factors in the wind turbine
design. In this paper, the effects of trailing-edge flap on the aerodynamic performance and …

Multiple rows of feathers, known as the covert feathers, contour the upper and lower
surfaces of bird wings. These feathers have been observed to deploy passively during high …

Adaptive flap as a new flow control technique with adaptability to the changing flow
separation has recently attracted much attention. This study uses the adaptive flap to …

An assessment of the role of fluid dynamic resistance and/or aerodynamic drag and the
relationship to energy use in the United States is presented. Existing data indicates that 16 …

The incorporation of nature-inspired techniques to control or reduce boundary layer
separation, to bring about performance enhancements on air/water vehicles, has been an …

Flow separation on blades is the main factor to reduce the power efficiency of vertical axis
wind turbine (VAWT). A bio-inspired flow control device called adaptive flap is considered to …

In light of the growing use of Vertical Axis Wind Turbines (VAWTs) in urban settings,
research is increasingly focusing on passive control methods to enhance VAWT efficiency …

It is known in the case of some birds that the coverts on the upper side of their wings pop-up
under critical flight conditions such as the landing approach, thus acting like a brake on the …