Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지
DOI QR코드

DOI QR Code

Flow Analysis around Multi-Legged Underwater Robot "Crabster" to Evaluate Current Loads

다관절 해저로봇 'Crabster'에 작용하는 조류하중 산정 및 유동해석

  • 박연석 (목포대학교 해양시스템공학과) ;
  • 김우전 (목포대학교 해양시스템공학과) ;
  • 전봉환 (한국해양과학기술원 해양시스템연구부)
  • Received : 2012.07.23
  • Accepted : 2012.10.25
  • Published : 2012.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, numerical simulations were performed to evaluate the current loads acting on the multi-legged underwater robot "Crabster" with a variety of incident angles using the ANSYS-CFX package. The Reynolds-averaged Navier-Stokes equations were solved to simulate the fluid flow around Crabster to calculate the forces and moments induced by incoming currents with various angles. First, to assess the posture stability of the body, the forces and moments were calculated with various incident angles when the current acted in the vertical and horizontal directions. Next, two forms of legs (box and foil types) were evaluated to determine the hydrodynamic force variation. Finally, the current forces and moments acting on the Crabster body with the legs attached were estimated.

Keywords

References

  1. Choi, S.K. and Ching, J.C. (1991). "Navier-Stokes Solution of Compllete Turbulent Flow Past Finite Axisymmetric Bodies", AIAA Journal., Vol 29, No 6, pp 998-1001. https://doi.org/10.2514/3.10691
  2. Jagadeesh, P. and Murali, K. (2006). "Investigation of Alternative Turbulence Closure Models for Axisymmetric Underwater Hull Forms", The Journal of Ocean Technology., Vol 1, No 2, pp 37-57.
  3. Jagadeesh, P., Murali, K. and Idichandy, V.G. (2009). "Experimental Investigation of Hydrodynamic Force Coefficients over AUV Hull Form", Ocean Engineering., Vol 32, No 1, pp 113-118.
  4. Patel, V.C. and Chen, H.C. (1986). "Flow over Tail and in Wake of Axisymmetric Bodies", Journal of Ship Research., Vol 30, No 3, pp 202-314.
  5. Sayer, P. (1996). "Hydrodynamics Forces on ROV Near the Air/Sea Interface", International Journal of Offshore and Polar Engineering., Vol 6, No 3, pp 177-183.
  6. Zedan, F.M. and Dalton, C. (1979). "Viscous Drag Computation for Axisymmetric Bodies at High Reynolds Numbers", Journal of Hydronautics., Vol 13, No 2, pp 52-60. https://doi.org/10.2514/3.63153