Computational Fluid Dynamics Compatible Transition Modeling Using an Amplification Factor Transport Equation
Computational Fluid Dynamics Compatible Transition Modeling Using an Amplification Factor Transport Equation
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DOI：
10.2514/1.j052905
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发表时间：
2014-10
期刊：
影响因子：
2.5
通讯作者：
J. Coder;M. Maughmer
中科院分区：
文献类型：
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作者：
J. Coder;M. Maughmer
提出了一种新的适用于低湍流外部气动应用的层流-湍流过渡模型，该模型以一种与现代计算流体力学解算器兼容的方式结合了线性稳定性理论。该模式使用了一个新的输运方程，该方程描述了边界层存在时最大Tollmien-Schlichting不稳定性振幅的增长。为了避免积分路径和非局部运算的需要，使用了一个局部定义的无因次压力梯度参数作为积分边界层性质的估计器。该模型已在Overflow 2.2f求解器中实现。将新模型的预测与翼型截面特性的高质量风洞测量进行比较，证实了该模型的预测质量，以及它在计算流体力学过渡建模方面的改进，而计算成本约为现有水平的一半。
A new laminar–turbulent transition model for low-turbulence external aerodynamic applications is presented that incorporates linear stability theory in a manner compatible with modern computational fluid dynamics solvers. The model uses a new transport equation that describes the growth of the maximum Tollmien–Schlichting instability amplitude in the presence of a boundary layer. To avoid the need for integration paths and nonlocal operations, a locally defined nondimensional pressure-gradient parameter is used that serves as an estimator of the integral boundary-layer properties. The model has been implemented into the OVERFLOW 2.2f solver. Comparisons of predictions using the new model with high-quality wind-tunnel measurements of airfoil section characteristics confirm the predictive qualities of the model, as well as its improvement over the current state of the art in computational fluid dynamics transition modeling at approximately half the computational expense.