Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Numerical Study on the Aerodynamic Performance of Asymmetric Vertical Folding Rotor Sail

비대칭 수직 접이식 로터세일의 성능 평가에 관한 수치해석 연구

  • Jung Yoon Park (Shipbuilding & Marine Simulation Center, Tongmyong University) ;
  • Janghoon Seo (Shipbuilding & Marine Simulation Center, Tongmyong University) ;
  • Dong-Woo Park (Department of Marine Mobility, Tongmyong University)
  • 박정윤 (동명대학교 조선해양시뮬레이션센터) ;
  • 서장훈 (동명대학교 조선해양시뮬레이션센터) ;
  • 박동우 (동명대학교 해양모빌리티학과)
  • Received : 2023.12.19
  • Accepted : 2024.01.24
  • Published : 2024.04.20
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Abstract

The rotor sail is one of the representative devices in eco-friendly wind-assisted propulsion systems that have been practically applied to commercial ships. The present study proposes an asymmetric vertical folding rotor sail (AFRS) designed for small ships, featuring asymmetric geometry along the vertical direction and the function of vertical folding. To evaluate the aerodynamic performance of rotor sail, the drag, lift and lift-to-drag ratio were derived using computational fluid dynamics. The aerodynamic performance of AFRS was compared with that of normal rotor sail with different aspect ratios and spin ratios. The effect of geometric parameters on the aerodynamic performance of AFRS was assessed by varying the asymmetric diameter ratio. The maximum improvement in lift-to-drag ratio for AFRS was approximately 12% in the considered case. Additionally, the resistance is decreased when AFRS is vertically folded without rotating. Throughout the present study, improved aerodynamic and resistance performances for AFRS were confirmed, which will successfully provide additional propulsion to small ships.

Keywords

Acknowledgement

본 연구는 산업통상자원부와 한국산업기술진흥원의 스마트특성화기반구축 사업 중 실물-가상연계 조선해양 기본설계 기술지원사업(P0021213) 과제의 지원을 받아 수행되었습니다.

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