Secondary-Flow Phenomena in Stator and Rotor-Blade Rows and Their Effect on Turbine Performance

Abstract

Investigations made at the NACA Lewis Flight Propulsion Laboratory(now the NASA Lewis Research Center) on secondary-flow phenomena in stator and rotor-blade rows are interpreted, with the aid of lowspeed flow visualization experiments, in order to establish sources and patterns of secondary flows there. Two stator configurations were designed to modify the stator-exit loss patterns and were investigated in conjunction with a transonic rotor to determine the effect on overall turbine performance of either reducing or eliminating stator-blade wakes and secondary-flow loss accumulations.