Calculation of the Turning Angle of Two-Dimensional Incompressible Cascade Flow
Nomenclature t — tangential spacing between blades / = chord length X = staggering angle (0 for unstaggered cascades, A + /37 + a5 = 90°) Wj = inlet velocity j87 = inlet angle as = angle of attack (angle between inlet velocity and chord) w2 = outlet velocity of real flow = outlet angle of real flow — j31 = turning angle (xu/l)s = distance between leading edge and transition point on the upper surface, measured on chord, referred to chord length 1 CD =drag coefficient (total drag, referred to upstream dynamic pressure and chord length) A/3; = correction value for inlet angle, inserted into calculation S = pressure coefficient (difference between up-stream total pressure and local pressure on blade surface, referred to up-stream dynamic pressure) x/l = distance between control-point and leading edge, measured on chord, referred to chord length d/l = ratio of maximum thickness and chord length Re = Wj»l/v = Reynolds number v = kinematic viscosity