Optimized cloaking design in moving fluid based on the scattering analysis method: 20th AIAA/CEAS Aeroacoustics Conference

This work develops a theoretical framework that can analyze acoustic cloak's scattering in a moving fluid. The equivalent sound source induced by the moving fluid local to the cloak is analytically constructed and is then estimated using Born approximation. Far field radiations can thereafter be obtained using the associated Green's function of convected wave equation. The results demonstrate that the proposed analytical method, which might be helpful in the designs and evaluations of cloaking systems, effectively elucidates the key characteristics of relevant physics. The optimized cloaking design based on the theoretical analysis is obtained that can greatly suppress the acoustic scattering.