Analysis of centrifugal compressor instabilities occurring with vaneless diffusor, at low mass flow momentum

Topic description

Specific Challenge:

The performance of compressors at low mass-flows is characterized by the occurrence of unsteady flow phenomena surge and rotating stall. These instabilities can cause noise nuisance and critical operating conditions with strong dynamical loading on the blades. Such phenomena must be detailed with the aim of applying a flow control strategy to enlarge the operating range and / or improve the stage performances. Please refer to the full and formal topic descriptions published in this call.