Generation of a Turbulent Boundary Layer Inflow for RANS Simulations
Generation of a Turbulent Boundary Layer Inflow for RANS Simulations
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生成 RANS 模拟的湍流边界层流入
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Thangasivam Gandhi
中科院分区：
文献类型：
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作者：
A. Rona;M. Grottadaurea;M. Monti;C. Airiau;Thangasivam Gandhi
在雷诺数为300leq Re_(Heta)leq 31000$的范围内，用解析和数值方法研究了全湍流边界层廓线的产生。根据零流向压力梯度的参考风洞测量值，对预测进行了验证。然后，通过模拟接近二维势汇的湍流边界层来检验该分析方法是否具有有利的压力梯度。这两种方法在压力梯度为零的情况下都表现出了良好的预测能力，其中数值方法提供了从层流子层到壁面的完整速度剖面。这项工作对于计算流体力学从业者在计算区域流入时产生平衡的厚湍流边界层具有实际意义。
The generation of a fully turbulent boundary layer profile is investigated using analytical and numerical methods over the Reynolds number range $300 leq Re_{ heta} leq 31000$. The predictions are validated against reference wind tunnel measurements with a zero streamwise pressure gradient. The analytical method is then tested for favourable pressure gradient by modelling the turbulent boundary layer approaching a two-dimensional potential sink. Both methods show a good predictive ability under a zero pressure gradient, with the numerical method providing a complete velocity profile through the laminar sub-layer down to the wall. This work is of practical interest to computational fluid dynamic practitioners for generating an equilibrium thick turbulent boundary layer at the computational domain inflow.