Effect of Inlet Prewhirl on Flow Field of Axial Flow Fan

Zhou Ye; Hai Yang Zhao; Yang Yang; Chun Li; Wei Gao

doi:10.4028/www.scientific.net/AMR.732-733.571

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 732-733Effect of Inlet Prewhirl on Flow Field of Axial...

Effect of Inlet Prewhirl on Flow Field of Axial Flow Fan

Abstract:

The flow in a single-stage fan is analyzed through numerical simulation. The results indicate that there exists a best prewhirl angle which can make flow loss minimal at a given flow rate. So we can improve the internal flow field structure by changing the prewhirl angle, thus the fan efficiency can be raised. In addition, the flow separation on the suction surface is sensitive to the variation of the prewhirl angle. The range of the separation on suction surface increases with the decrease of the prewhirl angle, and expands to the central area of the blades.