Abstarct: In this investigation, mean velocity and turbulent quantities have been calculated by numerical solution when the wake of a symmetrical airfoil (NACA0012) with a chord length 0f 100mm developed on the ( i ) straight duct ( ii ) straight diffuser ( iii ) curved duct ( iv ) curved diffuser at stations x/c=1,2,3 and 4. The model of turbulence and its modification by coupling with Navier-Stokes equations is used. The effects of adverse pressure gradient and of curvatures are studied separately and in combination. Four cases are considered with, ( i ) neither pressure gradient nor curvature ( ii ) adverse pressure gradient and no curvature ( iii ) curvature with zero adverse pressure gradient ( iv ) with adverse pressure gradient and curvature The individual influences of adverse pressure gradient and curvature on wake are similar to those observed by earlier investigations. It is further observed that the combined effect of adverse pressure gradient and curvature causes asymmetric wake and higher peak on inner side in the turbulent measurement .