Nonlinear Transfer Impedance of a Tapered Orifice

Application ID: 99471

This model analyzes the nonlinear transfer impedance of a tapered orifice that can be part of a perforate or microperforated plate (MPP). The analysis is carried out for various degrees of tapering of the perforate and for a frequency range.

A linear analysis is set up in the frequency domain using the Thermoviscous Acoustics, Frequency Domain interface. The nonlinear analysis is carried out in the time domain using the Thermoviscous Acoustics, Transient interface and the Nonlinear Thermoviscous Acoustics Contributions feature. The linear analysis is also carried out in the time domain for selected frequencies.

The results are compared with analytical and semi-analytical models in the simple straight cylindrical perforate configuration (circular orifice).

This model example illustrates applications of this type that would nominally be built using the following products: