The paper presents the results of an experimental investigation on a multistage centrifugal blower, during rotating stall. The test plant allows to change the turbomachine characteristics; in this research the blower has been tested in two different configurations: two-stage and four-stage, with vaneless diffusers. The unsteady flow field inside the blower has been measured by means of hot-wire anemometers. Three single hot-wire probes have been utilised to measure the development of the rotating stall, while a crossed hot-wire probe has been utilised to obtain the instantaneous flow field behind the impellers. The measurements have been done at different flow rate values, including stall inception.

Experimental investigation on rotating stall in a two-four stages centrifugal blower, with vaneless diffusers

ARNULFI, Gianmario;PINAMONTI, Piero
1996-01-01

Abstract

The paper presents the results of an experimental investigation on a multistage centrifugal blower, during rotating stall. The test plant allows to change the turbomachine characteristics; in this research the blower has been tested in two different configurations: two-stage and four-stage, with vaneless diffusers. The unsteady flow field inside the blower has been measured by means of hot-wire anemometers. Three single hot-wire probes have been utilised to measure the development of the rotating stall, while a crossed hot-wire probe has been utilised to obtain the instantaneous flow field behind the impellers. The measurements have been done at different flow rate values, including stall inception.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11390/671711
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