BOUNDARY INTEGRAL EQUATION METHOD FOR EVALUATING THE PERFORMANCE OF STRAIGHT-THROUGH RESONATOR WITH MEAN FLOW

In this paper, a numerical scheme for modelling the straight-through resonator with mean flow based upon the boundary integral equation method is developed. The approach can be applied to both short and long resonators with perforated center tube, and the results agree well with the experimental measurements reported in the literature without mean flow. The two effects, i.e., the convection effect, and the change in acoustic impedance of the perforated tube and of mean flow velocity on the acoustic performance of a straight-through resonator, are both considered. Further, other parameters such as porosity, tube thickness, and hole diameter are also investigated.