this disclosure is related with propeller noise and cavitation abatement in applications like propulsion , ventilation , pumping or turbine systems on fluids by novel techniques that allows stronger propellers with improved laminar flow by means of a propeller which consists on a rotating cylindrical block or a truncated substantially conical block with one or more tunnels around it rotational axis , said block also may have flow - guiding structures at both ends that help to keep the fluid &# 39 ; s laminar flow when it is mixing fluids with its environment , having the rotating block tunnels with either substantially circular shaped cross - section or variable shape cross - section from substantially circular to irregular oval measured in perpendicular plane to the rotational axis whereby it smoothly accelerates fluid or gas by means of either centrifugal or axial movement , also including dynamic balance or imbalance or torque modulation means that modulate specific vibrations which generates sound waves .