Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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AERODYNAMIC STUDY ON BOBSLEIGH BUMPER SHAPE

봅슬레이 범퍼 형상에 대한 공력학적 연구

  • Lee, Y.N. (Dept. of Mechanical Engineering, Graduate School, Inha University) ;
  • Kim, K.Y. (Dept. of Mechanical Engineering, Inha University)
  • 이영남 (인하대학교 대학원 기계공학과) ;
  • 김광용 (인하대학교 기계공학과)
  • Received : 2015.05.15
  • Accepted : 2015.06.17
  • Published : 2015.06.30
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Abstract

A parametric study on the shapes of bobsleigh bumpers has been performed to reduce the aerodynamic drag. Effects of geometric parameters, such as leading angle of leading bumper, the ratio of minimum width to maximum width of leading bumper, the ratio of leading bumper length to trailing bumper length, trailing angle of trailing bumper, and the ratio of bumper height to installation location of bumper from the bottom of bobsleigh, on the aerodynamic performance of the bobsleigh were estimated using 3-D Reynolds-averaged Navier-Stokes equations. The turbulence was analyzed using the shear stress turbulence model. Reynolds number based on the hydraulic diameter of the external flow channel was in the range of 150,000~1,000,000. Numerical results for drag coefficient were validated compared to experimental data. Ranges of the five geometric parameters were determined according to the rule of Federation Internationale de Bobsleigh et de Tobaganning. The aerodynamic performance of the bobsleigh sled was most sensitive to the leading angle of leading bumper and the ratio of minimum width to maximum width of leading bumper.

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References

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  1. CFD PREDICTION OF AERODYNAMIC DRAG ACTING ON ALPINE DOWNHILL SKIER vol.21, pp.3, 2016, https://doi.org/10.6112/kscfe.2016.21.3.071