지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.2
- 수록면
- 24 - 37 (14page)
이용수
초록· 키워드
오류제보하기
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.
목차
ABSTRACT
1. Introduction
2. Numerical Validation
3. Optimization of Slit Geometry
4. Performance Variation According to 3D Effect and Spraying Range
5. Conclusions
References
참고문헌 (6)
참고문헌 신청
Djojodihardjo, H. (2013). Progress and Development of Coanda Jet and Vortex Cell for Aerodynamic Surface Circulation Control–An Overview. The SIJ Transactions on Advances in Space Research & Earth Exploration, 1(1), 32–42. https://doi.org/10.9756/SIJASREE/V1I2/0102540402
Eom, M.J., Paik, K.J., & Lee, J.H. (2020). Numerical Study on the Lift-drag and Cavitation Performances of a Two-dimensional Hydrofoil Using the Coanda Effect. Journal of Advanced Marine Engineering and Technology, 44(6), 457–466. https://doi.org/10.5916/jamet.2020.44.6.457
Pfingsten, K.C., & Radespiel, R. (2007). Numerical Simulation of a Wing with a Gapless High-Lift System Using Circulation Control. New Results in Numerical and Experimental Fluid Mechanics VI, Springer, Berlin, Heidelberg, 71–79. https://doi.org/10.1007/978-3-540-74460-3_9
Seo, D.W., Lee, S.J., & Oh, J.K. (2016). Performance Analysis of Stabilizer Fin Applied Coanda System. Journal of Ocean Engineering and Technology, 30(1), 18–24. https://doi.org/10.5574/KSOE.2016.30.1.18
Seo, D.W., & Lee, S.H. (2013). A Study to Improve the Lift Performance of a Full Spade Rudder with the Coanda Effect. Journal of the Society of Naval Architects of Korea, 50(1), 25–32. https://doi.org/10.3744/SNAK.2013.50.1.25
Eom, M.J., Paik, K.J., & Lee, J.H. (2020). Numerical Study on the Lift-drag and Cavitation Performances of a Two-dimensional Hydrofoil Using the Coanda Effect. Journal of Advanced Marine Engineering and Technology, 44(6), 457–466. https://doi.org/10.5916/jamet.2020.44.6.457
Pfingsten, K.C., & Radespiel, R. (2007). Numerical Simulation of a Wing with a Gapless High-Lift System Using Circulation Control. New Results in Numerical and Experimental Fluid Mechanics VI, Springer, Berlin, Heidelberg, 71–79. https://doi.org/10.1007/978-3-540-74460-3_9
Seo, D.W., Lee, S.J., & Oh, J.K. (2016). Performance Analysis of Stabilizer Fin Applied Coanda System. Journal of Ocean Engineering and Technology, 30(1), 18–24. https://doi.org/10.5574/KSOE.2016.30.1.18
Seo, D.W., & Lee, S.H. (2013). A Study to Improve the Lift Performance of a Full Spade Rudder with the Coanda Effect. Journal of the Society of Naval Architects of Korea, 50(1), 25–32. https://doi.org/10.3744/SNAK.2013.50.1.25
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