Design practice for the stern hull form of a twin-skeg ship |
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Authors: | Dong-Woo Park Ho-Hwan Chun |
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Institution: | (1) Maritime Research Institute, Hyundai Heavy Industries Co., Cheonha-Dong, Dong-Gu, Ulsan, 682-792, South Korea;(2) Department of Naval Architecture and Ocean Engineering, Pusan National University, 30 Changjeon-Dong, Kumjeng-Ku, Busan, 609-735, South Korea |
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Abstract: | Hydrodynamic standards have been derived for the improvement of propulsive performance of twin-skeg hull forms. Three important
physical observations were used in the optimization of design practice for the stern hull form of twin-skeg ships: limiting
streamline pattern on the inner and outer skeg surface of a stern skeg, the balance between the flow intensity over the inner
and outer skeg surface of a stern skeg and nominal wake distribution in the propeller plane. Numerical calculations and model
tests have been compared to validate a CFD code used in the current work. Based on the stern flow analysis for the evaluation
of self-propulsion performance, effects of stern skeg arrangement on the propulsion efficiency, i.e. the distance between
skegs and the angle of the skeg with respect to shaft centerline, were intensively investigated. An optimized hull form design
for a twin-skeg ship was developed using the design practice derived in this work. |
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Keywords: | Twin-skeg ship Hydrodynamic standards Stern flow Optimized hull form CFD Model test at towing tank |
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