Scattering of a plane sound wave by a cylinder with an inhomogeneous elastic coating in a moving medium

In the article the problem of scattering of a plane monochromatic sound wave incident obliquely on a circular absolutely rigid cylinder covered by a radially inhomogeneous isotropic elastic layer is considered. The cylinder is located in a homogeneous ideal compressible fluid moving along forming of the cylinder with a constant subsonic speed.
The results of numerical calculations of directional patterns of a scattered acoustic field in the far zone for different laws of coating heterogeneity and values of the Mach number are presented.