تحلیل هیدرودینامیکی و آکوستیکی پروانه های مغروق به شیوه عددی

The noise and hydrodynamics of two propeller models were investigated. First, the non-cavitating and cavitating flow was analyzed in different operating conditions around the marine propellers using the finite volume method (FVM). The hydrodynamic tests of the propeller were performed in the cavitation tunnel and similar results were observed between the numerical and experimental results. Second, the flow results obtained in the first step were used as the input to extract the sound spectrum levels (SPLs) in the Ffowcs Williams–Hawkings (FW-H) formulation, to predict the far field noise. In addition, the behaviour of the obtained SPL was studied and a good agreement was observed between our data and the previous works results. We investigated the noise emission regions and compared the SPL in different separation between the propeller hub, and the monopole and dipole sources.