A numerical simulation is performed on a single-stage centrifugal compressor using the commercially available CFD software, CFX-TASCflow. The steady flow is obtained by circumferentially averaging the exit fluxes of the impeller. Three runs are made at the design condition and off-design conditions. The predicted performance is in agreement with experimental data. The flow details inside the stationary components are investigated, resulting in a flow model describing the volute/diffuser interaction at design and off-design conditions. The recirculation and twin vortex structure are found to explain the volute loss increase at lower and higher mass flows, respectively.
A Numerical Investigation on the Volute/Diffuser Interaction Due to the Axial Distortion at the Impeller Exit
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division February 2, 1000; revised manuscript received April 17, 2001. Associate Editor: Yi Tsujimoto.
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Gu , F., Engeda, A., Cave , M., and Di Liberti, J. (April 17, 2001). "A Numerical Investigation on the Volute/Diffuser Interaction Due to the Axial Distortion at the Impeller Exit ." ASME. J. Fluids Eng. September 2001; 123(3): 475–483. https://doi.org/10.1115/1.1385515
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