2020, 38(3): 479-489.
doi: 10.7638/kqdlxxb-2018.0129
摘要:
Interaction noise of a tandem airfoil configuration is studied using high-order large eddy simulations (LES) methods on a multi-block structured grid. The sound could be generated from aerodynamic interactions between the two airfoils positioned one after the other. The flow field is first calculated, and spectral properties of pressure fluctuations at a few given observation points are analyzed. The far-field noise obtained using FW-H integration is presented for the base configuration. The interaction from the wake of the airfoil in the front could interact with the leading edge of the trailing airfoil for specific configuration settings. The geometric features of both airfoils are also varied simultaneously to study the combined effects on the noise. The impact of geometric characteristics of trailing-edge and leading-edge of the front and rear airfoil, respectively, is the focus of the research. A typical surrogate-based approach is deployed in this study to reduce computational costs. The results show that, by careful tuning of the geometry and configuration, aeroacoustic characteristics of the tandem airfoil configuration could be modified to achieve lower acoustic levels.
