Pressure and Velocity Correlation in the wake of a Propeller

An experimental study of the flow and pressure field behind a marine propeller in a non-cavitating regime is reported. The flow field measurements, in phase with the propeller revolution angle, were performed by using Particle Image Velocimetry (PIV), and propeller wake evolution from the blade trailing edge to the slipstream contraction (near wake) was investigated. Pressure measurements, performed in four radial and eight longitudinal positions downstream of the propeller, were carried out at different advance coefficients, in order to point out the wake structures at different propeller operating conditions. The transducer data are analyzed by using the slotting technique to reconstruct the pressure in phase with the revolution of the reference blade. Finally, the correlation of the flow field and pressure signals is performed.