Statistical properties of nonlinear diffracting <Emphasis Type="Italic">N</Emphasis>-wave behind a random phase screen |
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Authors: | P V Yuldashev N A Bryseva M V Averiyanov Ph Blanc-Benon and V A Khokhlova |
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Institution: | 1.Department of Acoustics, Faculty of Physics,Moscow State University,Moscow,Russia;2.LMFA, UMR CNRS 5509,Ecole Centrale de Lyon,Ecully Cedex,France |
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Abstract: | Propagation of high amplitude N-wave behind a random phase screen is modeled based on the Khokhlov-Zabolotskaya-Kuznetsov equation. One-dimensional random
phase screens with Gaussian power spectrum density are considered. The effects of nonlinear propagation, random focusing,
and diffraction on the statistical properties of the acoustic field behind the screen, including propagation through caustics
and beyond caustics, are analyzed. Statistical distributions and mean values of the acoustic field parameters obtained within
the developed diffraction model and using nonlinear geometrical acoustics approach are compared. |
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