한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제35권1호
  • /
  • Pages.24-37
  • /
  • 2021
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  • 1225-0767(pISSN)
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  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
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A Study on the Performance Variation of a Three-Dimensional Hydrofoil Using Jet Flow

  • Eom, Myeong-Jin (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Paik, Kwang-Jun (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Lee, Ju-Han (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Kang, Shin-Min (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Kim, Dong-Young (Department of Naval Architecture and Ocean Engineering, Inha University)
  • 투고 : 2021.01.06
  • 심사 : 2021.01.25
  • 발행 : 2021.02.28
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초록

As one of the development directions of high-performance ships to reduce greenhouse gas emissions, there is research on high-performance propellers. However, in the case of conventional screw propellers, as they have been studied for a long time, there is a limit to improving efficiency only by depending on the conventional design and analysis methods. In this study, we tried to solve the problems using the Coanda effect by spraying a jet on the surface of the hydrofoil. The Coanda hydrofoil consists of a tunnel and jet slit to make jet flow. The computation was performed for each tunnel and slit position, and the efficiency according to the geometry of the hydrofoil was analyzed. In addition, a study on the 3D geometry change was conducted to analyze the performance according to the span direction spraying range and hydrofoil shape. As the height of the slit and the diameter of the tip were lower, when the slit is located in the center of the hydrofoil, the lift force increased and the drag force decreased. The increase rate of lift-to-drag ratio was different according to the shape of the hydrofoil, and the efficiency of the spraying condition of 0.1S-0.5S, which had the least effect on the vortex at the tip of the blade, was high for all 3D hydrofoils. When the geometry of the slit was optimized, and also the shape and spray range of the hydrofoil in 3D was considered, the efficiency of the jet sprayed hydrofoil was increased.

키워드

과제정보

This work was supported by the National Research Foundation of Korea (NRF) grant (No. 2019R1F1A1060883) funded by the Ministry of Science and ICT, Republic of Korea, and the HRD program for Global Advanced Engineer Education Program for Future Ocean Structures (No. P0012646) funded by the Competency Development Program for Industry Specialists of the Korean Ministry of Trade, Industry and Energy, Republic of Korea.

참고문헌

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