Open AccessEffect of swirl flow on characteristics of the annular diffuser
Author(s) -
Hardial Singh,
B. B. Arora
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1168/1/012029
Subject(s) - casing , diffuser (optics) , inlet , mechanics , flow (mathematics) , materials science , work (physics) , geology , optics , engineering , physics , mechanical engineering , petroleum engineering , light source
The current work deals with the axial flow annular diffuser’s performance characteristics with divergent casing angle 9° with an area ratio of 3. We performed the numerical simulation to examine the inlet swirl’s effect on the annular diffusers. The velocity profiles were measured along the span of diffusers at a number of locations. Analysis of the results shows that the inlet swirl improves the stability at outlet flow, gains the recovery of pressure, and delays the flow separation on the casing. It is found that static pressure recovery increases by 5% with swirl flow. The results prove that the best performance is observed in the unequal hub and diverging casing diffuser with an equivalent cone angle of 15° and the inlet swirl angle of 12°.