Development of coherent structures in the separated shear layer and wake of an airfoil in low-Reynolds-number flows was studied experimentally for a range of airfoil chord Reynolds numbers, 55×10 Rec 210×10, and three angles of attack, α=0◦, 5◦ and 10◦. To illustrate the effect of separated shear layer development on the characteristics of coherent structures, experiments were conducted for two...