This paper presents experimental data of flow developing in adverse pressure gradient condition of open circuit suction-type wind tunnel by particle image velocimetry (PIV). The objective of the study is to gain a perception of boundary layer characteristics of a turbulent boundary layer in adverse pressure gradient condition. The setup has been designed to reproduce external flow conditions. The reference pressure distribution used for the design was the NACA 2412 airfoil set at an angle of attack of 18o and at a Reynolds number based on the chord, Rec, of 2.5×106. The result has shown, there is a significant difference between the boundary layer characteristics. In addition, in the zero pressure gradient of turbulent boundary layer (ZPG TBL), Reynolds stresses are maximum close to the wall, while they have a maximum value around (y/δ=0.6) for the present flow. Finally, it could be mention that, the near wall region transfers much more turbulent energy to the upper region in the ZPG TBL case.

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