4-POLE PARAMETERS FOR AN ELLIPTIC CHAMBER WITH MEAN FLOW

The four-pole parameter matrix of an elliptical chamber with concentri c input and output is derived by solving the wave equation in the pres ence of mean flow. The four-pole parameter matrix is composed of the p roduct of input, chamber, and output section matrices. The matrix of t he chamber is composed of the standing wave component that propagates in the axial direction. The matrices of the input and output sections include terms representing the cross-sectional area ratio of the secti on and the chamber, and higher-order mode components. Based on the res ults, we investigate the effect of mean flow and compare the experimen tal results and the estimated results obtained by the proposed method. (C) 1998 Scripta Technica.