Effect of various winglets on the performance of marine propeller |
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| Institution: | 1. School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China;2. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, Hunan 410082, China;2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha, Hunan 410082, China;3. Strategic Development Department, China Three Gorges Corporations, Beijing 100038, China;1. AML Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;2. Advanced Propulsion Technology Research Department, China Marine Development and Research Centre, Beijing 100161, China;3. China Ship Scientific Research Centre, Wuxi 214082, China;4. Key Laboratory of Information Technology for Autonomous Underwater Vehicles, Chinese Academy of Sciences, Beijing 100190, China |
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| 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. |
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| Keywords: | Propeller Winglets TVC Rake angle |
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