Mean Velocity and Decay Characteristics of the Near and Far-Wake of a Compressor Rotor Blade of Moderate Loading

This paper reports the experimental s tudy of the three-di�ensional characteristics of the mean velocity in the wake of a moderately loaded compressor rotor blade . The measurements were taken with a three-sensor hot-wire probe rotating with the rotor . The wake was surveyed at severaJ radial and axial stations . The loading was found to have substantial effect and this was re flected no t only in the axial and tangential components , but also in the radial component . The radial veloci ties were found to be high very near the trailing-edge and this exhibits the characteristics prevalent in a trailing vortex system . The static pressures across the wake were measured using a direc­ tion insensitive spherical head s tatic-stagnation pressure probe. The static pressure was found to be higher inside the wake . These and other measurements a:-1� reported and correlated in this paper .