Linear-Frequency-Domain Predictions of Dynamic-Response Data for Viscous Transonic Flows
Linear-Frequency-Domain Predictions of Dynamic-Response Data for Viscous Transonic Flows
复制标题
粘性跨音速流动态响应数据的线性频域预测
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
M. Widhalm
中科院分区：
文献类型：
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作者：
R. Thormann;M. Widhalm
通过时间精确求解雷诺平均Navier-Stokes方程来确定全机布局的颤振边界，在计算费用方面是不允许的，因为必须对大范围的飞行条件、频率和结构模态形状预测非定常气动力载荷。尽管如此，人们对精确预测跨音速粘性颤振边界的要求越来越高，直到最近，这种要求还只能用高保真度的雷诺平均Navier-Stokes方法来满足。在过去的几年里，时间线性化/小扰动方法，然而，已被证明可以满足这一需求。它们保持了高精度的平均Navier-Stokes方法的保真度，并大大降低了计算费用。这种方法是在TAU-雷诺平均Navier-Stokes方法的基础上提出的。表示为TAU线性频域方法，它是有效的两个…
Determining the flutter boundaries for full aircraft configurations by time-accurately solving the Reynolds-averaged Navier–Stokes equations is prohibitive with respect to computational expense, as the unsteady aerodynamic loading must be predicted for a wide range of flight conditions, frequencies, and structural mode shapes. Nonetheless, there is an increasing demand to accurately predict flutter boundaries in the viscous transonic regime—a demand, which, until recently, could only be satisfied by high-fidelity Reynolds-averaged Navier–Stokes methods. Brought to application readiness over the last years, time-linearized/small-disturbance methods, however, have been shown to satisfy this demand as well. They retain the Reynolds-averaged Navier–Stokes method’s fidelity to a high degree, at a substantially reduced computational expense. Such a method is presented here on the basis of the TAU–Reynolds-averaged Navier–Stokes method. Denoted as the TAU linear-frequency-domain method, it is validated for both ...