Design and determination of radial air swirler blade lengths using CFD

Document Type

Conference Proceeding

Publication Date



The effect of blade length on the swirl strength inside a combustor with a radial air swirler is analyzed using computational fluid dynamics (CFD). The objective is to determine the blade length that produces a flow field with the strongest swirl and recirculation for a given swirler blade angle. The air swirler analyzed in this study has fifteen blades, each inclined at 60° from the radius. The swirler is attached atop a cylindrical combustor. Swirl numbers for various blade lengths are calculated, and the size of the recirculation zones are compared. Both the size of the recirculation zone and swirl number have maximum values at L/W=l.8, where L is blade length and W blade spacing.

Publication Title

39th Aerospace Sciences Meeting and Exhibit