Scattering of plane wave from moving body underwater with finite impedance surface

An acoustic analogy model and numerical approach to predict propeller aircraft sound field have been developed to predict the scattering of incident plane wave by moving body with the surface of finite impedance. The scale rule of Mach number and Helmholtz number in the model was derived and demonstrated in the numerical experiments. Two types of check in numerical experiments illustrate the validity of the present model and the numerical approach developed in present paper. The effect of Helmholtz number and movement velocity has been discussed finally. (C) 2003 Elsevier Ltd. All rights reserved.