How to find Design Angle of Attack for a blade with multiple airfoils?

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Jacopo Serafini

Section AOA depend on the composition of rotational velocity, wind velocity and blade pitch (you have even smaller contributions like deformation velocity). If you want to quickly evaluate it you may use velocity triangles.

Karthik Jayanarasimhan

Thank You Sir.But that i geometrical method.Is there any mathematical formulation or any links on angle of attack of S series airfoils?