날개의 형상 변화에 따른 LNG선용 비대칭 전류고정날개 설계
Design of Asymmetric Pre-swirl Stator for LNG Carrier according to Variation of Stator Shapes
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참고문헌
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초록
Recently researchers are conducting a lot of research related to EEDI in order to satisfy IMO resolution MEPC. Especially they are interested in design of energy saving device. This paper is to design the asymmetric pre-swirl stator for 160K LNG carrier in order to reduce energy. Two types of the asymmetric pre-swirl stator are taken into account; constant and variable pitch angle stators. "constant" and "variable" mean state that the pitch of stators change by radius. The dimensions of the stators are initially determined using potential-flow code. The propulsion performances of the stators are predicted using viscous-flow code. The model test is carried out in towing tank in PNU. Prediction of ship performance generally follow ITTC recommended. Ship wake prediction was done by two method, ITTC 1978 and ITTC 1999. Therefore propulsion performances were compared ITTC 1978 with ITTC 1999 methods. Comparison components are delivered power and thrust deduction coefficient of the model. Final pre-swirl stator is selected by comparing experiment and CFD.
Abstract
Recently researchers are conducting a lot of research related to EEDI in order to satisfy IMO resolution MEPC. Especially they are interested in design of energy saving device. This paper is to design the asymmetric pre-swirl stator for 160K LNG carrier in order to reduce energy. Two types of the asymmetric pre-swirl stator are taken into account; constant and variable pitch angle stators. "constant" and "variable" mean state that the pitch of stators change by radius. The dimensions of the stators are initially determined using potential-flow code. The propulsion performances of the stators are predicted using viscous-flow code. The model test is carried out in towing tank in PNU. Prediction of ship performance generally follow ITTC recommended. Ship wake prediction was done by two method, ITTC 1978 and ITTC 1999. Therefore propulsion performances were compared ITTC 1978 with ITTC 1999 methods. Comparison components are delivered power and thrust deduction coefficient of the model. Final pre-swirl stator is selected by comparing experiment and CFD.
참고문헌 (7)
- Choi, J.E., "Computational Prediction of Ship-speed Performance", Journal of Maritime Science and Technology, 14(3), pp.322~333 (2009)
- 강용덕, "편재된 비대칭형 전류고정날개 추진시스템에 관한 연구", 대한조선학회 논문집, 41(3), pp.13~21 (2004), 대한조선학회
- ITTC Performance Committee, "Final Report and Recommendations to the 15th ITTC", Proceedings of the 15th International Towing Tank Conference (1978)
- ITTC Specialist committee on unconventional propulsion, "Final report and recommendations to the 22nd ITTC", Proceedings of the 22th International Towing Tank Conference (1999)
- Kim, M.C., "A study on the Asymmetric Preswirl Stator System", Journal of the Society of Naval Architects of Korea, 30(1), pp.30~44 (1993)
- Lee, J.T., "Development of Preswirl Stator-Propeller System for Improvement of Propulsion Efficiency : a Symmetric Stator Propulsion System", Journal of the Society of Naval Architects of Korea, 41(3), pp.13~21 (1992)
- Lee, J.T., "Development of a Preswirl Stator Propulsion System for a 300K VLCC", Journal of the Society of Naval Architects of Korea, 31(1), pp.1~13 (1994)