STUDY ON TURBULENCE CHARACTERISTICS OF WIND ENERGY RESOURCES IN CHINA'S TYPICAL TERRAIN

He Yuanyuan; Fang Yanying; Cheng Xueling; Zhu Rong

doi:10.19912/j.0254-0096.tynxb.2023-0343

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (7) : 724-734. DOI: 10.19912/j.0254-0096.tynxb.2023-0343

STUDY ON TURBULENCE CHARACTERISTICS OF WIND ENERGY RESOURCES IN CHINA'S TYPICAL TERRAIN

He Yuanyuan^1,2, Fang Yanying³, Cheng Xueling^1,4, Zhu Rong⁵

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Abstract

In this paper, four typical terrains for wind energy utilization are selected to analyze the wind field characteristics in the atmospheric boundary layer, especially for turbulent fields. By analyzing the relationship between dimensionless variance and dimensionless stability parameter z/L for different underlying surfaces, it is shown that they are within the applicable range of the turbulence model in IEC. The turbulent kinetic energy increases exponentially with wind speed, and the exponential difference is obvious under different stability levels. In addition to the influence of stability, the vertical change in turbulent kinetic energy is also related to the underlying surface. Over the local flat surface of the Donghaitang coast and the flat grassland area of Xilinhot, the turbulent kinetic energy decreases less with height. Over the complex terrain of the lake-land interface of Poyang Lake, the kinetic energy of turbulence near the surface increases significantly, and it decreases rapidly with height. Over the undulating middle mountain hills, the terrain reduces the turbulent kinetic energy of the lower layer, and the upper layer increases with height. The friction velocity profile is basically consistent with the turbulent kinetic energy profile, but its maximum is not necessarily near the surface.

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atmospheric boundary layer / wind energy / atmospheric turbulence / wind energy resouces / turbulent kinetic energy / underlying surface

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He Yuanyuan, Fang Yanying, Cheng Xueling, Zhu Rong. STUDY ON TURBULENCE CHARACTERISTICS OF WIND ENERGY RESOURCES IN CHINA'S TYPICAL TERRAIN[J]. Acta Energiae Solaris Sinica. 2024, 45(7): 724-734 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0343

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