A Nonlinear Computational Method for the Propagation of Shock Waves in Aero-engine Inlets Towards a new Model for Buzz-saw Noise Prediction

The nonlinear propagation of finite amplitude acoustic waves in hard-walled guides is treated in the following paper. A convected nonlinear wave equation is derived, and a quasianalytical solution based on axially varying modal amplitudes is presented for a no-flow case. Plane and non-planar finite amplitude wave propagation is investigated, and nonlinear interactions of higher order modes are studied in two-dimensional and three-dimensional cylindrical configurations.

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