LAUSR

Abstract Generation, propagation, reflection, and interference of pressure waves in the water entry of wedge-shaped bodies are investigated in this study using a modified 2D acoustic equation. Impact pressure generated by symmetric and asymmetric entry of wedges is considered as excitation for the initiation of an acoustic wave. Available impact pressure is discretized and applied as multiple nodal source functions. The acoustic equation is numerically solved using finite difference method. Pattern of propagating pressure waves is comparedfor the symmetric and asymmetric entries with different deadrise angles. The comparison shows that asymmetric entry can significantly change the propagation pattern. The problem is also inspected for the shallow water entry by considering reflection from boundaries. The shallow water results reveal that special cares should be considered in specifying tank dimensions in experimental measurement of the impact pressure to avoid undesired pressure oscillation.