A boundary element analysis of a concentric-tube resonator

Abstract A method for modeling the acoustic system of a perforated component based upon the boundary element analysis is presented. It applies to systems with complex shaped boundaries, and is not confined to the configuration which has one acoustically long dimension assumed from the traditional one-dimensional analyses. The technique can also apply to either a short or long resonator with a fully or partially perforated center tube, and has been proved by experimental measurement. The influence of mean flow, without including the convective effect, is also investigated by using the flow-induced perforated parameter.