深圳大学学报理工版

构造合理且满足水平均匀性的大气边界层是计算风工程的一个重要难题.基于雷诺平均方法,采用标准k-ε湍流模型,结合Richards & Hoxey入口条件,对数值风洞的顶面边界条件施加剪切应力修正,进行二维空流场的平衡大气边界层模拟,给出了一类能够较好满足大气边界层自保持要求的流场边界条件.并将此类边界条件同时运用到标准k-ε湍流模型和SST(shear stress transport)k-ω湍流模型中,针对美国德克萨斯技术大学模型场地试验进行三维流场全尺寸数值模拟,验证了所提边界条件对上述两类双方程湍流模型在低矮建筑钝体绕流的适用性.

Constructing the equilibrium atmosphere boundary layer(ABL)is an important problem in computational wind engineering(CWE). Based on the standard k-ε turbulence model and the Richards & Hoxey inflow boundary condition, the top boundary condition is revised by adding shear stress and applied on the numerical simulation of a two-dimensional empty fetch. A fairly good boundary condition for the simulation of self-sustaining equilibrium atmosphere boundary layer is presented based on the results. The suggested boundary conditionsare also applied to the simulation of the full-scale Texas Tech University(TTU)building model with the standard k-ε model and the shear stress transport(SST)k-ε model, and a comparison is made among the numerical results and the field measurements. The simulation results prove the validity of the suggested boundary conditions.

引言
1 边界条件和模型参数
2 数值结果
3 TTU模型数值模拟
4 结语

图1 计算网格
Fig.1 Calculation mesh

图2 不同工况和不同截面的速度曲线<br/>Fig.2 Plots of stream-wise velocity under different conditions with different sections

图2 不同工况和不同截面的速度曲线
Fig.2 Plots of stream-wise velocity under different conditions with different sections

图3 不同工况和不同截面的湍动能曲线<br/>Fig.3 Plots of turbulent kinetic energy under different conditions with different sections

图3 不同工况和不同截面的湍动能曲线
Fig.3 Plots of turbulent kinetic energy under different conditions with different sections

图4 TTU建筑模型尺寸及测点示意图[14]<br/>Fig.4 Dimension of TTU building and positions of measure points[14]

图4 TTU建筑模型尺寸及测点示意图[14]
Fig.4 Dimension of TTU building and positions of measure points[14]

图5 各测点平均风压系数<br/>Fig.5 Mean Pressure coefficients of measured points

图5 各测点平均风压系数
Fig.5 Mean Pressure coefficients of measured points

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备注

引言

1 边界条件和模型参数

2 数值结果

3 TTU模型数值模拟

4 结语

期刊信息

备注

引言

1 边界条件和模型参数

2 数值结果

3 TTU模型数值模拟

4 结 语

期刊信息

4 结语