Discussion: “The Time-Variant Aerodynamic Response of a Stator Row Including the Effects of Airfoil Camber” (Fleeter, S., Bennett, W. A., and Jay, R. L., 1980, ASME J. Eng. Power, 102, pp. 334–342)

Abstract

chordwise variation of the aerodynamic phase lag data for the first and second harmonics. As is indicated, the first harmonic phase lag data demonstrate that a convected wake traveling at approximately 62 ft/s (18.90 m/s) dominates nearly the entire pressure surface, but not the suction surface. The second harmonic phase lag data, on the other hand, shows that a convected wake traveling at approximately 112 ft/s (34.14 m/s) dominates the entire suction surface, but not the pressure surface. Thus, not only does a convected wake phenomena exist over the entire cambered airfoil vane chord at large negative incidence angles, but these wakes are convected at different velocities along each surface.