TITLE:
Numerical Study on Nonlinear Sound Propagation for Parametric Array
AUTHORS:
Kei Fujisawa
KEYWORDS:
Numerical Simulation, Nonlinear Sound Propagation, Parametric Array, FDTD
JOURNAL NAME:
Journal of Flow Control, Measurement & Visualization,
Vol.2 No.3,
July
24,
2014
ABSTRACT: This paper presents the numerical study on the nonlinear sound propagation for the parametric array using the compressible form of Navier-Stokes equations combined with the mass and energy conservation equations and the state equation. These governing equations are solved by finite difference time domain (FDTD) based method. The numerical result is shown for the parametric sound propagation in the near field of the sound source in cylindrical coordinate. The result indicates the generation of low-frequency unsteady beat by the interaction of two frequency sound waves in the near field, which grows to a difference frequency sound in the far field.