Abstract: The effect of propeller configuration and working conditions on the propeller wake and its radiated noise are studied in the paper.The viscous multiphase flow theory is used to numerically predict the features of propeller wake.The N-S equations,the mixture multi-phase model,turbulent model and cavitation model are combined to solve and predict the pressure in the propeller wake.The characteristic analysis between the numerical results of pressure and the measured results of noise indicates their interrelation.Finally,the effect of the skewed angle and advancing ratio on the frequency of pressure is investigated.The amplitude of low frequency line spectrum is correlated with the value of the skewed angle and the advancing ratio.