Abstract
This paper reports an experimentally validated numerical analysis of fluid flow through a radial diffuser comprising two concentric and parallel disks. The flow is supplied axially by a feeding orifice placed in the back disk and becomes radial after being deflected by the front disk. The main purpose of the study is to assess the effect of a chamfer at the exit of the feeding orifice. Due to the irregular flow geometry, a mixed Eulerian–Lagrangian method is employed to numerically solve the fluid flow. The model is validated by comparing the numerical results with experimental data for pressure distribution on the front disk, as a function of the gap between the disks and the Reynolds number. Results for pressure on the front disk and effective flow and force areas show that the flow is significantly affected by chamfer angles as small as 5°.
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