The wake flow of a triangular prism exhibits symmetric distribution in terms of recirculation zone, turbulent kinetic energy, Reynolds stress and turbulence intensity. Increasing the corner radius enhances stability and reduces the recirculation zone length. Two rows of vortices with opposite rotation directions are formed at the corners, and increasing the corner radius brings vortex center closer to leeward side. The energy of first mode decreases while that of second mode increases as the corner transitions from sharp to rounded, while spatial distribution of vortex structures significantly diminishes.
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