The use of an extensive rapid response data reduction to restore the flow characteristics at the outlet of a centrifugal rotor

Detailed measurements were performed on an unshrouded industrial centrifugal impeller for three different mass flow rates. Kulite rapid response sensors were used for measurements of wall static and stagnation pressure, and a TFV laser technique was used to obtain data at the design point (inside the impeller passage and at the passage outlet). The data reduction analysis made it possible to characterize the flow pattern at the outlet of the impeller, and the results show that it is possible to define an 'inviscid' flow region for this type of machine.