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A new generation of micro shear stress sensors and flexible PCB for the general purpose of flow separation detection and control is presented here. A novel MEMS shear stress sensor array featuring integration of discrete micro sensors and polyimide substrate has been developed. Then, CFD (Computational Fluid Dynamics) simulations were performed to estimate the corresponding shear stress distribution within the column cylinder aerofoil at flow conditions are the velocity of 17.3 m/s, which is according to the Re of 1×10 5 . In the wind tunnel tests, by disposing the two sensor arrays output signals of the sensors output voltages means and RMS values, the results proved by these flexible arrays could detect the location of the fluid separation point in time.

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