Design and Structural analysis of Marlin Torpedo with Coupled Contra Rotating Propellers

The goal of propeller designers has always been to increase several settings to improve propulsion efficiency have been devised. One of the leading attractive propulsion systems is coupled contra-rotating propellers, which can be expected to significantly improve the open water efficiency with reduced rotational kinetic energy losses. The 3-Dimensional hydrodynamic contour of the coupled contra rotating propellers makes simulation with the highest rotational velocity of 2000rpm with an analytical structural design exceedingly challenging deformation must be less then 1mm. To analyze the propeller strength the Ansys FEM Simulation approach is applied. Static analysis is carried out with a Stainless Steel and has a component of strength analysis to guarantee the safety of the coupled contra-rotating propellers.