Propeller wake velocity and pressure field

An experimental study of the flow and pressure field behind a marine propeller is reported. The flow field measurements, in phase with the propeller revolution angle, were performed by using Particle Image Velocimetry (PlV) and propeller wake evolution from the blade trailing edge to thesli pstream contraction (near wake) was investigated. Pressure measurements, performed in four radial and eight longitudinal positions downstream 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 slotting-technique to reconstruct the pressure in phase with the revolution of reference blade. Finally the correlation of the flow field and pressure signals is performed.