Abstract
The casing treatments have the potential to extent the operating range of centrifugal compressor. To research performance verify of the high speed centrifugal compressor between the different conditions with the different casing treatments and with untreated smooth wall. The time accurate 3-dimentional numerical simulations are performed in a high speed centrifugal compressor with the different casing treatments. The different tip flow topologies of blades and the variety of the secondary flow vortex are detailed analyses between these two casing treatments configurations. It is concluded that the major reason of the Mechanism of Stall Margin Improvement is restrained the tip leakage vortex.
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