Tailoring anisotropic synthetic inflow turbulence generator for wind turbine wake simulations

被引:0
|
作者
Ali, Naseem [1 ,2 ]
Gatti, Davide [2 ]
Kornev, Nikolai [3 ]
机构
[1] Helmholtz Zentrum Hereon, Inst Coastal Syst, Max Planck Str 1, D-21502 Geesthacht, Germany
[2] Karlsruhe Inst Technol, Inst Fluid Mech, Kaiserstr 10, D-76131 Karlsruhe, Germany
[3] Univ Rostock, Chair Modeling & Simulat, Albert Einstein Str 2, D-18059 Rostock, Germany
关键词
LARGE-EDDY SIMULATION; BOUNDARY-LAYER; FLOW; MODEL; STABILITY; ISOTROPY; SCALAR; RETURN;
D O I
10.1063/5.0217802
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In computational fluid dynamics, defining precise boundary conditions, especially at inlets, is of great importance. Inlet flows typically exhibit natural turbulence, which is managed in various ways in scale-resolving simulations. Methods to establish turbulent inlet conditions are commonly created using natural transition, uncorrelated oscillations, periodic boundary conditions from auxiliary simulations, or synthetic turbulent fields. In this study, we explore a technique aimed at generating a divergence-free synthetic inflow turbulence with arbitrary anisotropy. The methodology is based on the conventional portrayal of turbulence as consisting of several coherent structures. While our approach adeptly emulates predefined statistical characteristics across different scales, its primary focus is on generating input parameters that impact the airflow within the wake of individual wind turbines and the atmospheric boundary layer within a wind farm. The results are compared with high-resolution velocity experimental measurements, large eddy simulations, and the digital filter-based inlet boundary condition already available in OpenFOAM. The findings demonstrate that the applied inflow generator outperforms the default OpenFOAM filter, particularly in the context of a single wind turbine.
引用
收藏
页数:16
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