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Analysis of the Unsteady Flow Field in a Centrifugal Compressor from Peak Efficiency to Near Stall with Full-Annulus Simulations

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Academic year: 2021

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Figure

Figure 1: 3D sketch of the compressor stage hub with the return downstream channel.
Figure 4: Time-averaged axisymmetric profile from hub to shroud of the incidence angle at the impeller inlet.
Figure 5: Time-averaged reduced axial velocity (a) and time-averaged reduced radial velocity (b), in the main blade suction side boundary layer, at 50% span, 2 mm downstream the leading edge.
Figure 8: Frequency spectra of a pressure signal in the relative frame, at 90% span, at the impeller inlet.
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