Abstract：The hydrodynamic characteristics of 54 vortex generators under ideal conditions were calcula-ted by using the large eddy simulation(LES)method. The tail vortex size, spacing and strength of vertex generator(VG)under 54 working conditions were analyzed in order of three flow speeds, three geometries and six installing angles. Some of the evaluated hydrodynamics result was validated against the corresponding particle image velocimetry(PIV)experiment. The results show that the con-vortex has a larger angle along the flow-direction than that of the pro-vortex. With the increase of the distance between the vortex generator and vortex, the installing angle firstly increases and then decreases until the con-vortex is consistently coherent with the pro-vortex. It has been also found that as the absolute value of installing angle increases, the size and strength of vortex increases linearly. The distance between con-vortex and pro-vortex in a pair of vortices increases; however, the distance of next two adjacent pairs of vortexes decreases. With the increase of velocity, the vortex strength is enhanced significantly, nevertheless, the distance between successive vortices remains almost constant. The distance between con-vortex and pro-vortex in a pair increases gradually with an increase in the installing length, but the turbulence kinetic energy(TKE)distribution remains almost the same.
