Direct simulation of a turbulent oscillating boundary layer
Direct simulation of a turbulent oscillating boundary layer
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DOI：
10.1007/978-3-642-73948-4_32
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
P. Spalart;B. Baldwin
中科院分区：
文献类型：
--
作者：
P. Spalart;B. Baldwin
本文考虑了自由速度在时间上以正弦形式在零平均值附近变化的湍流边界层。流动具有丰富的各种行为，包括强压力梯度、速度分布中的拐点和剪切应力的反转。在高雷诺数的速度和应力分布的理论制定。良好的解决直接Navier-Stokes模拟进行了一个狭窄的范围内的雷诺数。流动也计算了更广泛的雷诺数范围内使用一个新的代数湍流模型。三种方法和实验产生的结果进行了比较。详细的相位平均的统计结果，从直接模拟提供，以协助双折射模型的发展。
The turbulent boundary layer under a freestream velocity that varies sinusoidally in time around a zero mean is considered. The flow has a rich variety of behaviors including strong pressure gradients, inflection points in the velocity profile, and reversal of the shear stress. A theory for the velocity- and stress profiles at high Reynolds number is formulated. Well-resolved direct Navier-Stokes simulations are conducted over a narrow range of Reynolds numbers. The flow is also computed over a wider range of Reynolds numbers using a new algebraic turbulence model. The results produced by the three approaches and by experiments are compared. Detailed phase-averaged statistical results from the direct simulations are provided to assist turbulence-model development.