Reflection and refraction on the fluid-solid interface of acoustic field excited by a concave phased array

The reflection and refraction on the fluid-solid interface of the acoustic wave excited by a concave phased array are studied in this paper. The analytical presentations of the refraction and reflection fields of the focused acoustical wave on the fluid-solid interface are obtained for the first times by the ray approximation method. The refraction fields in the solid are analyzed and discussed. The ultrasonic phased fields of the refraction compressional and shear waves in the solid are numerical simulated and investigated by the analytical presentations. It is found that the compressional and shear waves are better focused in the solid with a cylindrical fluid-solid interface than in that with a planar fluid-solid interface.