Abstract
The turbulent nature of the wind above the earth’s surface depends on both the topology of the terrain and the presence of natural obstacles along the way such as low grasses and shrubs, as well as medium-tall trees. When the wind passes through the indicated obstacles, detachment is observed i.e. formation of large eddies, which are carried away by the main flow, after which they dissipate. The size of the vortices, as well as the period of dissipation, depends on the wind speed, as well as the type of obstacle. The presence of windbreak trees significantly changes the wind shear over the surface, and hence the energy potential of the wind in the vicinity of trees. In present work, the influence of the tree belt on the wind shear at the adopted prevailing wind direction is investigated. The degree of deformation of the speed profile after the obstacle in weakly complex terrain is shown. Relevant prescriptions for the location of wind turbines in the vicinity of windbreak trees are presented in view of minimum shading and maximum energy output.
Highlights
Studying the wind behaviour over terrain is essential for determining the energy potential
The following two prevailing wind directions and how the wind shear is affected when passing through the tree missives are adopted
When the prevailing wind direction is from the north, before the wind reaches the mast, it passes through three windbreaker groups of trees, which are at a distance of about 500 m from each other
Summary
Studying the wind behaviour over terrain is essential for determining the energy potential Every terrain specific such as hills and elevations, as well as natural and artificial obstacles, affect the distribution of the speed profile in height, which changes the potential of the energy winds. Tall vegetation represents wind resistance, the main purpose of which is to significantly reduce the speed in the surface boundary layer in order to prevent the transfer of planting material from agricultural land. This vegetation significantly affects the speed profile in the vicinity of the. K- turbulent model is used to predict the impact of the surface roughness on the main wind flow by using z0 function [7, 8]
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