Description of secondary flows in radial flow machines

Detailed measurements by Moore (1973) have revealed that the jet wake formation in radial flow turbomachines is essentially a three-dimensional phenomenon governed by streamwise vorticity; the boundary layers in question make an important contribution to the behavior of low energy fluid transport to a wake region. Secondary flows also contribute to distorted diffuser inlet conditions, which in turn are responsible for important downstream perturbations. Attention is presently given to blade pressure and suction side boundary layers, secondary flow velocity vectors, meridional velocity variation, secondary flow velocity vectors, and secondary flows in diffusers.