CFD Simulation On The Complex Wind Farm Terrains

Accurate assessment of wind resources is to ensure large-scale wind farm product safe and return on investment. Vast areas of mountains are rich in wind resources in our country. For complex mountain terrain, the traditional method for wind resource assessment and site selection was no longer applicable. The CFD simulation methods and characteristics show broad prospects for development and play an important role in engineering. However, how to apply CFD methods on the mountains of rolling terrain, including the choice of computational domain and boundary treatment, has become the problems to be solved in the CFD method of engineering application.In this paper, CFD package FINETM/TURBO with a wall function using the k-e turbulence model was applied to simulate the mountain wind farm. First, a simplified two-dimensional mountain model was researched to explore the computational domain of height, length of the mountain, and give a preliminary proposal to scale before and after the extension of objectives mountain; two-dimensional mountain model using different forms of field of imports, including different levels of the transition height and connected position, give the terrain analysis and recommended method of boundary treatment; then the simplified staggered arrangement on three-dimensional mountain model is discussed to verify some of the conclusions of two-dimensional model.Based on the above simplified model findings, Ping Lu of Shanxi mountainous terrain was be calculated to study the actual domain selection and CFD numerical simulation. Wind resource analysis and results of the site show: import, export and border cross-section applying the direct transition to an average altitude of its handling of the flow of the mountain did not make a greater impact. This conclusion provides a theoretical basis of mountain model and handling method for the wind field CFD simulation.