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This thesis offers new insights into the fluid flow behavior of
automotive centrifugal compressors operating under near-stall
conditions. Firstly it discusses the validation of
three-dimensional computational fluid dynamics (CFD) unsteady
simulations against acoustic experimental measurements using an
original procedure based on plane wave pressure decomposition. It
then examines the configuration of the CFD cases, highlighting the
key parameters needed for a successful calculation. Moreover, it
describes both the compressor mean and unsteady flow field from
best-efficiency to near-surge operating points. Lastly, it provides
readers with explanations of the various phenomena that arise when
the mass flow rate is reduced and the compressor is driven to poor
and noisy performance. Written for students, researchers and
professionals who want to improve their understanding of the
complex fluid flow behavior in centrifugal compressors, the thesis
offers valuable practical insights into reducing the acoustic
emissions of turbochargers.
This thesis offers new insights into the fluid flow behavior of
automotive centrifugal compressors operating under near-stall
conditions. Firstly it discusses the validation of
three-dimensional computational fluid dynamics (CFD) unsteady
simulations against acoustic experimental measurements using an
original procedure based on plane wave pressure decomposition. It
then examines the configuration of the CFD cases, highlighting the
key parameters needed for a successful calculation. Moreover, it
describes both the compressor mean and unsteady flow field from
best-efficiency to near-surge operating points. Lastly, it provides
readers with explanations of the various phenomena that arise when
the mass flow rate is reduced and the compressor is driven to poor
and noisy performance. Written for students, researchers and
professionals who want to improve their understanding of the
complex fluid flow behavior in centrifugal compressors, the thesis
offers valuable practical insights into reducing the acoustic
emissions of turbochargers.
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