선박용 연료절감장치 Pre-Swirl Duct의 설계 및 평가방법 연구

• Published in: 大韓造船學會 論文集 Vol. 50; no. 3; pp. 145 - 152
• Main Authors: 신현준(Hyun-Joon Shin), 이강훈(Kang-Hoon Lee), 한명륜(Myung-Ryun Han), 이창열(Chang-Yul Lee), 신성철(Sung-Chul Shin)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2013
• Subjects: 조선공학; Pre-swirl duct(전류 고정 덕트); Energy saving(에너지 절감); Recover the loss of propeller(프로펠러 손실 회복)
• ISSN: 1225-1143; 2287-7355

Recently, with oil price jumping and environmental issues, Green ship is paid deep attention to by ship owner, operator, builder, class and government. Fuel efficiency and reduction of $CO_2$ emissions are expected to have a strong influence on the design and operation of merchant ships. Many ship owners and operators are seeking the more economic method by the best operating route and the application of reliable and effective energy saving devices. With the Energy Efficiency Design Index (EEDI) in 2013 attention will more than ever be focused at achieving maximum fuel economy in the hydrodynamic design of hull forms, their appendages and propellers. IMO requirements for $CO_2$ emission for ships will now be implemented for vessels ordered from 1st January 2013. So far, a lot of new idea and patents have been proposed, tested, claimed and applied for various kinds of ship type. This paper shows numerical and experimental work related to a study on a energy saving devices particularly for fuller ship such as merchant vessel of Tanker and Bulker. From the bare hull wake measurements, typical upper/lower asymmetry of hull wake at the propeller disk was found. The pre-swirl duct have been designed and reviewed to recover the loss of propeller running in that condition. The general function of the pre-swirl duct was set to work against this asymmetry of wake and generate pre-swirled flow into the propeller against the propeller rotating direction.