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A platform for research: civil engineering, architecture and urbanism
Effect of various winglets on the performance of marine propeller
Highlights The blade tip of newly designed propeller tilts toward the pressure side. The pressure drop on the suction side of winglets propellers is less than the conventional propeller. The great advantage of the winglets is in the inhibition of the TVC. The development of TVC is reduced when the blade tip tilts toward the pressure side with a small angle.
Abstract The tip vortex cavitation (TVC) is an issue of increasing interest, because the TVC plays an important role in propeller radiated noise and cavitation erosion. The marine propeller with winglets, which is inspired by the winglets of airfoil, is numerically investigated in the present paper. The blade tip of newly designed propeller tilts toward the pressure side. The difference between six propellers is the change of the rake angle at r/R = 1.0. The pressure coefficient, TVC, axial velocity field and helicity are analyzed. The numerical results show that the winglets of newly designed propeller scarcely affect the efficiency of propeller. The thrust coefficient gradually decreases with the increase in rake angle. As for the suction side, the pressure coefficient (Cp) of winglets propellers is higher than the conventional propeller in general. In addition, the winglets are beneficial to generate less cavitation behavior when the rake angle is small. However, as the rake angle is further increased, the cavitation behavior of winglets propeller is also increased, even larger than the conventional propeller. Therefore, it can be deduced that the winglets can be used to effectively improve the TVC characteristics to some extent.
Effect of various winglets on the performance of marine propeller
Highlights The blade tip of newly designed propeller tilts toward the pressure side. The pressure drop on the suction side of winglets propellers is less than the conventional propeller. The great advantage of the winglets is in the inhibition of the TVC. The development of TVC is reduced when the blade tip tilts toward the pressure side with a small angle.
Abstract The tip vortex cavitation (TVC) is an issue of increasing interest, because the TVC plays an important role in propeller radiated noise and cavitation erosion. The marine propeller with winglets, which is inspired by the winglets of airfoil, is numerically investigated in the present paper. The blade tip of newly designed propeller tilts toward the pressure side. The difference between six propellers is the change of the rake angle at r/R = 1.0. The pressure coefficient, TVC, axial velocity field and helicity are analyzed. The numerical results show that the winglets of newly designed propeller scarcely affect the efficiency of propeller. The thrust coefficient gradually decreases with the increase in rake angle. As for the suction side, the pressure coefficient (Cp) of winglets propellers is higher than the conventional propeller in general. In addition, the winglets are beneficial to generate less cavitation behavior when the rake angle is small. However, as the rake angle is further increased, the cavitation behavior of winglets propeller is also increased, even larger than the conventional propeller. Therefore, it can be deduced that the winglets can be used to effectively improve the TVC characteristics to some extent.
Effect of various winglets on the performance of marine propeller
Gao, Hongtao (author) / Zhu, Wencai (author) / Liu, Yutong (author) / Yan, Yuying (author)
Applied Ocean Research ; 86 ; 246-256
2019-03-07
11 pages
Article (Journal)
Electronic Resource
English
Propeller , Winglets , TVC , Rake angle
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