This study deals with the development of a numerical wire mesh screen model for the unsteady simulation of aeroacoustic configurations. Such devices are indeed of growing interest for practical applications because they potentially lead to significant noise-reduction effects. Numerical simulations including wire mesh screens are therefore of major interest to optimize their possible location and properties, as well as to get a better understanding of the involved physical phenomena. On the basis of several finely resolved unsteady simulations (direct numerical simulation and large-eddy simulation) of the flow through an isolated wire mesh sample, a numerical wire mesh screen model is proposed and calibrated. An application of the method to the tandem cylinder test case is then performed for different screen locations and porosities. The introduction of wire mesh screens in the flow is observed to lead in some cases to a significant reduction of the radiated noise, by up to 8 dB.

这项研究涉及用于气动声学结构非稳态模拟的数字丝网筛网模型的开发。实际上，这样的设备在实际应用中受到越来越多的关注，因为它们可能导致显着的降噪效果。因此，包括丝网筛网在内的数值模拟对于优化其可能的位置和特性以及更好地理解所涉及的物理现象非常重要。基于对通过隔离丝网样品的流动的几种精细求解的非稳态模拟（直接数值模拟和大涡模拟），提出并校准了数值丝网筛网模型。然后针对不同的筛网位置和孔隙率，将该方法应用于串联气缸测试案例。