Discussion: “An Experimental Investigation Into the Effect of Wakes on the Unsteady Turbine Rotor Flow” (Binder, A., Fo¨rster, W., Kruse, H., and Rogge, H., 1985, ASME J. Eng. Gas Turbines Power, 107, pp. 458–465)

formation was obtained on the span wise fluctuations.These spanwise fluctuations are expected to have only a small quantitative influence on the relative turbulence intensity.Such values of turbulence intensity probably cause the rotor blade boundary layer on the pressure side to become turbulent, at least when the wake is passing [7,12].