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해저 토질 개선을 위한 해저경운기 주변의 속도장에 대한 수치해석

Numerical Analysis on Velocity Fields around Seabed Tiller for the Improvement of Seabed Soil

  • 김장권 (군산대학교 동력기계시스템공학과) ;
  • 오석형 (군산대학교 기계공학부) ;
  • 김종범 (한국어촌어항협회) ;
  • 정상옥 (국립수산과학원 갯벌연구센터)
  • 투고 : 2017.01.05
  • 심사 : 2017.03.08
  • 발행 : 2017.04.30

초록

The steady-state, incompressible and three-dimensional numerical analysis was carried out to evaluate the velocity fields around the seabed tiller used for the improvement of the seabed soil and the pulling force and buoyancy generated by driving the seabed tiller. The turbulence model used in this study is a realizable $k-{\varepsilon}$ well known to be excellent for predicting the performance of the flow separation and recirculation flow as well as the boundary layer with rotation and strong back pressure gradient. As a results, a typical vortex pair appears near the adjacent rotor vane tip. When the current is stopped, there is no force when pulling the seabed tiller, but when the current flows at 1.2 knots, the force acts on the downstream side and the pulling force is much greater. In stationary currents, the buoyancy of the seabed tiller acts more strongly towards the seabed as the number of rotations of the rotor increases, but acts more strongly toward the sea surface at 1.2 knots of current.

키워드

참고문헌

  1. N. A. Lybeck, 1913, "Submarine Cultivator and Harvester", US Patent No. 1079182.
  2. D. S. Mok and S. H. Mok, 2007, "The Seabed Soil Improver (In Korean)", Korean Patent No. 10-0714056, Korean Seabed Environment Co., LTD.
  3. C. H. Kwoun et al., 2004, "A Study on the Improvement of a Hook for the Collecting of Marine Wastes on the Seabed", Journal of the Korean Society of Marine Environmental Engineering, Vol. 7, No. 4, pp. 180-184.
  4. J. H. Kim et al., 2012, "Study on Linking a Submerged Marine Litter Collection Project to a Marine Environment and Resources Investigation Project", Journal of the Korean Society of Marine Environmental Engineering, Vol. 15, No. 1, pp. 54-65. https://doi.org/10.7846/JKOSMEE.2012.15.1.054
  5. SC/Tetra(Version 12), 2015, User's Guide, Software Cradle Co., Ltd.

피인용 문헌

  1. 연안어장의 토질 개선을 위한 경운기 로터 주변의 유동장에 대한 수치해석 vol.21, pp.5, 2017, https://doi.org/10.9726/kspse.2017.21.5.020