A method based on linear forcing is developed to generate realistic turbulent fluctuations at the inlet of a computational domain. The method uses a precursor computation of convected forced isotropic turbulence and variables are extracted from a plane to be imposed at the inlet of the main simulation. In the precursor computation, the turbulent fluctuations are generated and sustained using a synthetic generator and a linear forcing which have been adapted in order to allow the specification of the intensity and length scale. The method is then applied to the analysis of a conical vortex in interaction with a wall subjected to external turbulence using Improved Delayed Detached Eddy Simulation. Good agreement with experimental data is achieved both concerning the decay of the turbulent fluctuations in the upstream region and concerning the sensitivity of the vortex to the Free Stream Turbulence.

开发了一种基于线性强迫的方法，以在计算域的入口处生成逼真的湍流波动。该方法使用对流强迫各向同性湍流的先验计算，并从要施加在主模拟入口处的平面中提取变量。在前体计算中，湍流波动是使用合成发电机和线性强迫产生并维持的，它们已经被调整以便允许强度和长度标度的规范。然后，使用改进的延迟分离涡流模拟将该方法应用于与受外部湍流影响的壁相互作用的圆锥形涡旋的分析。