Given the flow angles and blade met

Given the flow angles and blade metal angles, β′1 and β′3, the air incidence angles are i1=β1−β′1 and i3=β′3−β3. Flow turning angles are defined: ε12=β1−β2 and ε34=β4−β3, and the flow deviation angles are δ2=β′2−(β1−ε12) and δ4=β′4−(β4−ε34). The total pressure loss coefficients for each stage are then defined in the traditional way, using the cascade relative inflow velocity