Investigation of Vortex Rings for Free Jet and Synthetic Jet at Various Reynolds Numbers and Strouhal Numbers

Figure 9

Vorticity fields of two-dimensional synthetic jet under St = 0.22 and different Reynolds numbers: (a) Re = 100; (b) Re = 500; (c) Re = 1100; (d) Re = 2400; (e) Re = 4064; (f) Re = 5918; (g) Re = 8100; (h) Re = 15886.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)