Horseshoe Vortex Control Using Streamwise Vortices

Juncture flow is a common feature in many engineering application with a characteristic horseshoe vortex structure. Horseshoe vortex causes score, elevated turbulence and noise in the juncture region. A number of active and passive control methods have already been used in past yet more appropriate methods will always be looked for. Horseshoe vortex control using vortex generators has been studied in the current paper using Surface oil flow visualization, surface pressure measurement and PIV. Single and multiple vortex generators in series are placed symmetrically upstream of the juncture region in common flow up configuration. Significant reduction in strength and size of horseshoe vortex is achieved. The results also show a larger control effect using multiple vortex generators compared to single vortex generator.