Investigation of flow fluctuations at the exit of a radial-flow centrifugal impeller

Hamrick, Joseph T., Mizisin, John.
naca-rm-e52h11
1952


Surveys were made at the exit of a radial-flow centrifugal impeller to obtain instantaneous values of velocity from blade to blade and at various positions between the front and rear diffuser walls. Surveys were also made at several radial stations midway between the walls of the diffuser to observe the radial change in flow pattern. At the impeller exit, there were variations in velocity patterns across each passage from passage to passage, and for the same passage from revolution to revolution. The general flow patterns persisted into the diffuser and were still evident at a radius 23 percent greater than that of the impeller.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1952/naca-rm-e52h11.pdf