Droplet Impingement Characteristics with Dual Synthetic Jet Control

In the condition of low speed incoming flow, numerical simulation was conducted to study the droplet impingement characteristics of the airfoil embedded with synthetic jet/dual synthetic jet actuator in the leading edge. Eulerian two-phase model and EWF model in Fluent were used. Results show that under active control of synthetic jet or dual synthetic jet, the water droplet in the front edge of airfoil is blocked, which can further reduce the ice strength of the region, and the dual jet outlet location can be arranged reasonably, which can achieve the double effects of lift-increase and anti-icing. The mechanism is that, under the action of high frequency synthetic jet, a pair of stable closed recirculation zones in front of the leading edge of the airfoil formed a "vacuum area" of water droplet. Due to the low velocity and mass fraction of water droplet in the recirculation zone, the water droplet collection rate distribution of the leading edge and the droplet trajectories are changed, which can change the ice shape and play the role of virtual aerodynamic shape.