루지의 형상변화가 공력성능에 미치는 영향

Numerical study on the aerodynamic performance of a luge has been performed for various shapes of luge body. To analyze the aerodynamic drag of the luge, three-dimensional Reynolds-Averaged Navier-Stoke equations were used with the SST model as a turbulence closure. Grid system was composed of unstructured tetrahedral meshes. The effects of the major axis length of the front bottom, the minor axis length of the cover between the legs, the minor axis length of curved surface of the shoulder bottom, and the radius of the shoulder cover on the drag coefficient, were evaluated. The results show that the aerodynamic performance was most affected by the radius of curvature on shoulder cover.