Acoustic Analysis of Square Array of Cylinders in Duct Using Unsteady Fluid Force.

Abstract

In this paper we describe the acoustic analysis of fluid flow in a duct with four cylinders. The sound field is considered to be related to the oscillating lift forces which act on the cylinders, which are experimentally measured. The Helmholtz acoustic equation associated with oscillating fluid force is applied to the flow past four circular cylinders. The boundary element method for the numerical solution of the sound field is applied. The sound pressure inside a cavity with a one-way movable wall is calculated in order to test the method. The sound pressures on the four cylinder surfaces and the wall surface are evaluated.