Numerical Investigation on Hydrodynamic Performance of a Ducted Propeller for Vectored Underwater Robot
Rongmin Zhang and Shasha Zhou
School of Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences)
3501 Daxue Road, Changqing District, Jinan City, Shandong 250353, China
This paper investigated hydrodynamic performance of the Ka4-70+No.19A ducted propeller astern of a vectored underwater robot at diverse deflection angles. Employing SST k-ω turbulence model combined with moving reference frame technique, numerical computation of the ducted propeller in a fully developed turbulence behind hull was carried out. The validity of the model was verified by comparing the numerical results of open water performance and the experimental values. The hydrodynamic performance of the ducted propeller was worked out and discussed in detail. The wake flow and thrust deduction fraction corresponding to different deflection angles were analyzed. Results show that the ducted propeller generates more thrust and requires more torque at lager deflection angle. In addition, the thrust deduction fraction increases with the increase of the deflection angle.
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