Visualisation of multiple vortex rings from an axisymmetric synthetic jet

Synthetic jets have been an area of interest in the recent years with constantly increasing industrial demand. Application areas are widespread and a strong focus is put on boundary layer control as well as on mixing enhancement. A synthetic jet has been studied using physical experiments involving high-speed camera footage and smoke visualisation. Additionally, threedimensional transient numerical simulations have been performed. In the physical experiments high-speed camera footage is used to capture the smoke visualisation of the synthetic jet flow field where vortex interaction was present. The hybrid turbulence model SAS (ANSYS CFX) is used for the numerical simulations. The results of the numerical simulations show good visual agreement in the jet flow field.