CFD MODEL OF WIND FIELD IN TYPICAL COMPLEX TERRAIN CONSIDERING ATMOSPHERIC STABILITY

Sun Zhuang; Li Shumin; Zhu Rong; Zheng Dan; Liu Weiyi; Gao Jianyong

doi:10.19912/j.0254-0096.tynxb.2022-1944

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (4) : 197-205. DOI: 10.19912/j.0254-0096.tynxb.2022-1944

CFD MODEL OF WIND FIELD IN TYPICAL COMPLEX TERRAIN CONSIDERING ATMOSPHERIC STABILITY

Sun Zhuang¹, Li Shumin¹, Zhu Rong², Zheng Dan¹, Liu Weiyi¹, Gao Jianyong¹

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Abstract

In order to evaluate and use efficiently the wind resources of the typical complex terrain, combined with the Reynolds average k-ε equation model, the y₀ type wall function and the thermal buoyancy, an atmospheric CFD model is proposed, which can simulate wind field characteristics with the unstable, neutral and stable atmospheric stability. The effect of the turbulence parameters and atmospheric roughness on the wind velocity profile is studied as well. Two ways are applied to drive the CFD model： one way is to drive the CFD model by using the tested wind speed profile upstream of the inflow stream, and another way is to drive the CFD model by using the output wind speed profile and temperature profile of the WRF （Weather Research and Forecasting Mode） model. The CFD model is verified by using the wind test data of the South Huashan hills in Shanxi Shenchi. The effect of thermal buoyancy on the wind field is studied by the WRF-CFD coupling simulation, and the simulation accuracy of the atmospheric CFD model under different thermal buoyancy is compared in detail. The results show that the atmospheric CFD model can accurately simulate the atmospheric wind environment in the mountain area under different stability conditions, but the simulation wind profile on the leeward side of the hills is a little poor when considering the unstable state.

Key words

wind power / wind farm / atmospheric boundary layer / complex terrain / atmospheric CFD model / wind profile / atmosphere stability

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Sun Zhuang, Li Shumin, Zhu Rong, Zheng Dan, Liu Weiyi, Gao Jianyong. CFD MODEL OF WIND FIELD IN TYPICAL COMPLEX TERRAIN CONSIDERING ATMOSPHERIC STABILITY[J]. Acta Energiae Solaris Sinica. 2024, 45(4): 197-205 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1944

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