NUMERICAL INVESTIGATION OF FLOWTHROUGH CONICAL DIFFUSER WITH SWIRLGENERATOR
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Abstract
Swirlisatangentialvelocitycomponentofthefluidflowandisoftenpresentintheconicaldi
ffuserasaresultofrotatingmachineryintheupstream section. The present experimental work is
dedicated to study theeffectof moderate swirlonwide angle conicaldiffuser performance
andflow development. The numerical investigation were performed in ansyssoftware. There
are two different diffusers having a cone angle ofand 21°(with area ratio 4.2) were selected
for this investigation. The results showedthat the moderate swirl can significantly improve
the stalled diffuser
(21°coneangle)performance;however,ithasalittleeffectonthediffuser(13°cone angle) having
incipient turbulent boundary layer separation. It wasconfirmed that the introduction of
moderate swirl reduces the chances offlowseparationinwideangle conical diffusers.
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