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- W2167486955 abstract "The turbulent flow inside a low-speed centrifugal compressor at design condition is investigated using large-eddy simulation (LES) comprising of up to 26×106 computational volume cells. Unlike in the past, the current study’s special emphasis is placed on the turbulence field evolution inside the impeller. LES predictions suggest that the Boussinesq hypothesis does not seem to be valid, especially near the exit of the impeller where the blade unloading takes place. Reynolds stress variations show a tendency toward an “axisymmetric expansion” type of turbulence after the impeller exit for which the subgrid-scale stress contribution shows a monotonic decrease. Probability density function analysis for the leakage flow show that instantaneous velocities in the wake region are less intermittent as compared with those in the jet. Time spectra analysis display also another feature that the energy cascade proceeds at a higher rate and lasts longer in the wake region than in the tip jet region." @default.
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- W2167486955 date "2010-01-11" @default.
- W2167486955 modified "2023-10-18" @default.
- W2167486955 title "Predictions of Turbulent Flow for the Impeller of a NASA Low-Speed Centrifugal Compressor" @default.
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- W2167486955 doi "https://doi.org/10.1115/1.3140824" @default.
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