Figure 5. R elative rotor blade positions
Figure 6(a) show that the flow field is characterized by high flow
velocities reaching 200 m/s conformed to different clocking positions,
where parts of IGV wakes are convected through the blade passages while
the flow incidence and station point around the blade are affected.
Further flow complexity occurs in the tip clearance where the leakage
around develops into a vortex and mixes out with the annulus wall
boundary layer. Figure 6(b) depicts variations in the static pressure,
which is more significant at the fore of rotor blade, and diffusion is
remarkably influenced by the blade position. Downstream rotor blade the
flow is influenced by the back-pressure from the rotor step and the flow
rotation and diffusion continues further.