Abstract
The mechanism of the favorable stall-prevention effect by an optimum air separator in an axial flow fan has been clarified in terms of changes in the internal flow distributions caused by the air separator in the previous study [3]. In order to study further the effect, flow turbulence behaviors related with the improvement were surveyed with a hot-wire anemometer. Although rotating stalls were found in stalling in the solid wall condition, no such phenomena were detected in the air separator condition. Furthermore, the behaviors of flow unsteadiness were also seen to have been altered significantly by the air separator. The changes suggest improved internal flow situations achieved by the air separator from the aspect of flow turbulences also.
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