G0501-6-1 軸流ファン内部流動に及ぼすエアセパレータ装置の効果(回転機械)

概要

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A radial-vaned air-separator has demonstrated a significant stall improvement effect in axial flow fans. Changes in the internal flow patterns in the fan effected by the device were experimentally investigated. The air separator-applied condition turned out to create tip-peaky axial velocity distributions, compared with rather flat ones for the solid-wall conditions. It is understood that the inclined meridional streamlines have created higher Euler work and circumferentially uniform flow pattern, both of which tend to suppress fan stalling and occurrence of rotating stall phenomena. The effects have been achieved by a very small amount of recirculation flow within the air separator passage as small as 1% of the fan flow, for the practically important working flow range of the fan including the zone originally stalled for the solid wall condition.
社団法人日本機械学会の論文
2009-09-12