Elaboration of compact synthetic micro-jets based on micro magneto-mechanical systems for aerodynamic flow control

摘要

This paper described an optimized and compact lateral slot synthetic jet based on magneto-electro-mechanical actuation. The main objective in designing this device is to meet the performances required for flow control applications on the square back body. First, we present the synthetic jet design and the result of numerical simulations based on finite element method showing the formation of the vortex rings. Secondly, the fabrication process and the elaborated devices were described. Finally, fluidic characterisations were performed using one component calibrated hot wire. The results show that for an operation frequency close to 330 Hz and a bias power less than 1W, the output velocity reaches 40m/s at 2mm from the slot exit. The design enables us to choose the range of operation frequency in the frequency range 100Hz-700Hz by varying the thickness of the elastomeric membrane between 100μm and 600μm.