Numerical Study on Wind Resource Around the Turbine Site for Real Complex Terrain Based on CFD Method

Abstract

[Introduction] High slope terrain is easily formed around the turbine site in complex terrain for constructing wind turbine platform, which changes the distribution characteristics of the wind resources and affects the generating capacity and safety performanc.The paper aims to get influence factors of high slope and protect wind turbine. [Method] The numerical simulation method was applied for the high slope terrian for actual wind farm based on STAR-CCM+ software, the wind influence degree of the site selection, the slope grade and the excavation depth were studied in the paper. [Result] It’s shown that the high slope will changes the wind acceleration effect of origin terrain resulting in large-scale fluid separation; When the high side slope is located in the upwind direction of the turbine, the large wind shear is easily generated in the lower blade tip, and the turbulence intensity exceeds the standard value, but the wind resource parameters have good performance when the high side slope is located in the downwind direction of the terrain; The gradient of high slope has no great influence on the wind parameters for the terrain in front of high slope;When the height of the turbine tip is lower than the slope’s, the wind shear will excess standard value. [Conclusion] The results can provide reference for the turbine platform design and tower height of the high slope terrain.

Keywords

• complex terrain
• wind turbine
• high slope
• cfd method