On Alternative Model of Sound Scattering in Turbulent Moving Media

Model of sound scattering in turbulent medium comprising chaotically distributed in space moving in manifold directions spherically symmetric structures - localized flows, say, vortices of various linear dimensions from smallest “Kolmogorov’s” to outer turbulent scales is proposed. Scattering crossections and distance attenuation parameters related to structures motion in the presence and absence of vorticity inside them for sound waves are calculated on etalon problem solutions basis. Resulting frequency dependencies and scattering laws in model medium differ substantially not only from Rayleigh law but from several other well known predicted patterns of sound scattering in turbulent medium as well. Attenuation value is expected to depend on vortices Mach number to scattering wave parameter ratio. Model parameter control is available by means of dimensions, velocities and concentration of basic localized flow changes corresponding to turbulence scale, intensity and degree of development changes. Comparison of expected attenuation parameters with experimental data and estimates based on classical isotropic turbulence models is presented. PACS numbers: 43.20.Fn, 43.28.Gq, 43.28.Py