Numerical investigation of marine propeller with counter-rotating propeller performance

The flow behavior around a marine propeller with a counter-rotating propeller (CRP) is presented in this paper. Numerical tests were carried out on the INSEAN E779A model with a 1/9 scale rotating at different rotational speeds and advance coefficient. The turbulence phenomena have been modeled using the usual k–[Formula: see text] turbulence model, which features a fine mesh and prisms around the four blades of the 3D domain. The results of the simulations are compared with the measurements studied and available in the literature, as well as with the international standard (wake map). In order to reduce noise output, a CRP is used to reinforce the propeller structure, reduce energy waste and limit the tip vortex. It is also contrasted to a basic propeller. According to the results, CRP can increase propulsive efficiency by 50% at advance coefficient (J = 910) when compared to traditional configurations. This makes it a potential technology for contemporary marine engineering, especially in high-speed ships, submarines and naval vessels.