RESEARCH ON ATTENUATION LAW OF TURBULENT KINETIC ENERGY IN UNIFORM FLOW BASED ON TWO-EQUATION TURBULENCE MODEL

Li Deshun; Ma Guolin; Guo Tao; Xu Quan

doi:10.19912/j.0254-0096.tynxb.2020-0829

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (4) : 418-427. DOI: 10.19912/j.0254-0096.tynxb.2020-0829

Topics on Key Technologies for Safety of Electrochemical Energy Storage Systems and Echelon Utilization of Decommissioned Power Batteries

RESEARCH ON ATTENUATION LAW OF TURBULENT KINETIC ENERGY IN UNIFORM FLOW BASED ON TWO-EQUATION TURBULENCE MODEL

Li Deshun, Ma Guolin¹, Guo Tao¹, Xu Quan¹

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Abstract

Through theoretical derivation and numerical simulation, the attenuation law of turbulence kinetic energy and the essential physical difference among the standard k-ω model, the standard k-ω model and the SST k-ω turbulence model are analyzed from the determination process of the closure coefficients of the turbulence model, the influencing factors of the diffusion term of the transport equation, the inlet boundary conditions, the grid size and so on, the attenuation law of turbulence kinetic energy under neutral atmospheric conditions is analyzed by numerical simulation. The results show that in uniform flow, when the standard k-ω turbulence model is used and the inlet turbulence intensity is relatively small or the eddy viscosity is relatively large, the attenuation of turbulence kinetic energy is higher than that of the standard k-ω model and the SST k-ω model, under neutral atmospheric conditions, when the SST k-ω turbulence model is used and the pressure outlet condition is used as the top boundary, the velocity, turbulent kinetic energy, and specific dissipation rate profiles are better maintained.

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wind turbines / uniform flow / turbulence kinetic energy attenuation / turbulence model / boundary condition / numerical simulation

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Li Deshun, Ma Guolin, Guo Tao, Xu Quan. RESEARCH ON ATTENUATION LAW OF TURBULENT KINETIC ENERGY IN UNIFORM FLOW BASED ON TWO-EQUATION TURBULENCE MODEL[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 418-427 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0829

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