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

The Society of Naval Architects of Korea (대한조선학회)
권호 표지
DOI QR코드

DOI QR Code

A Numerical Study for Design of a Fixed Type Fin Stabilizer Utilizing the Coanda Effect

콴다 효과를 적용한 고정식 핀 안정기 설계를 위한 수치적 연구

  • Seo, Dae-Won (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Lee, Seung-Hee (Department of Naval Architecture and Ocean Engineering, Inha University)
  • 서대원 (인하대학교 조선해양공학과) ;
  • 이승희 (인하대학교 조선해양공학과)
  • Received : 2010.09.03
  • Accepted : 2011.01.13
  • Published : 2011.04.20
Download PDF
⟨ Previous Next ⟩

Abstract

Fins are widely used for roll stabilization of passenger ferries and high performance naval ships, among others. The Coanda effect is noticeable when a jet stream is applied tangentially to a curved wing surface since the jet can augment the lift by increasing the circulation. The Coanda effect has been found useful in various fields of aerodynamics and speculated to have practical applicability in marine hydrodynamics where various control surfaces are used to control motions of ships and the other offshore structures. In the present study, numerical computations have been performed to find proper jet momentum coefficients $C_j$ and trailing edge shapes suitable for the application of the Coanda effect to a stabilizer fin. The results show that the lift coefficient of the modified Coanda fin at the zero angle of attack ${\alpha}$ identically coincides with that of the original fin at ${\alpha}\;=\;25^{\circ}$ when Coanda jet is supplied at the rate of $C_j$ = 0.1. It is also shown that a fixed type fin stabilizer utilizing the Coanda effect can be implemented without changing the fin angle to actively control the motions of ships and the other offshore structures.

Keywords

References

  1. Abbott Ira H. & Doenhoff Albert. E. von., 1958. Theory of wing sections. United States of America Dover Publications, Inc. Newyork.
  2. Cho, S.K. Hong, S.Y. & Jang, T.S., 2004. Experiment and simulation study on performance evaluation and design of fin-stabilizer. Journal of the Society of Naval Architects of Korea, 41(6), pp.1-7. https://doi.org/10.3744/SNAK.2004.41.6.001
  3. McAlister K.W. & Takahashi R.K., 1981. NACA0015 wing pressure and trailing vortex measurements. NACA Technical paper 3151, ACSCOM Technical Report 91-A-003.
  4. Min, K.S., 1985. A Study on the preliminary design of fin stabilizer. Journal of the Society of Naval Architects of Korea, 22(4), pp.1-8.
  5. Park, J.J. & Lee S.-H., A Numerical Study on a Circulation Control Foil using Coanda Effect. Journal of the Society of Naval Architects of Korea, 37(2), pp.70-76.
  6. Seo, D.W. Jeong, S.W. & Lee, S.-H., 2007. Influence of tail blades on the performance of a fin. Journal of the Society of Naval Architects of Korea, 44(2), pp.55-63. https://doi.org/10.3744/SNAK.2007.44.2.055
  7. Seo, D.W. Kim, J.H. & Lee, S.-H., 2008a. On the Influence of end plates upon the tp vortex cavitation characteristics of a fin stabilizer. Journal of the Society of Naval Architects of Korea, 45(1), pp.18-28. https://doi.org/10.3744/SNAK.2008.45.1.18
  8. Seo, D.W. Kim, J.H. Kim, H. & Lee, S.-H., 2008b. A numerical study on the geometry of jet injection nozzle of a Coanda contol surface. Journal of Ship and Ocean Technology, 12(3), pp.36-54.
  9. Seo, D.W. Oh, J.K., & Lee, S.-H., 2010. A study for improvement of lift performance of a Horn-type rudder with the Coanda effect. Journal of the Society of Naval Architects of Korea, 47(4), pp.543-552. https://doi.org/10.3744/SNAK.2010.47.4.543
  10. Seo, D.W., 2011. A study on the performance of a high lift marine rudder implementing the Coanda effect. Ph.D thesis, Inha University, Incheon, Korea.

Cited by

  1. A Study to Improve the Performance of a Fixd Type Fin Stabilizer with Coanda Effect vol.37, pp.3, 2013, https://doi.org/10.5394/KINPR.2013.37.3.257
  2. Performance Analysis of Stabilizer Fin Applied Coanda System vol.30, pp.1, 2016, https://doi.org/10.5574/KSOE.2016.30.1.18