Effects of Operating Conditions on the Flow in theMoving Blade Passage of a Single Stage Axial-Flow Fan

[摘要] Three dimensional steady and unsteady velocity distributions in the axial flow fan weremeasured using a hot wire probe for various operational conditions, various rotationalspeeds and various measuring positions. For measuring the velocity distributions in the bladepassage, a specially designed and manufactured hot wire traversing apparatus was used.Steady velocity distributions, turning angles, effects of incident to the cascade, flow leakagethrough the tip clearance and effects of the flow separation show the flow phenomenathrough the blade passages. Unsteady velocity distributions show time dependent proceduresof the wake flowing through the moving blade passage. Considering these results ofmeasurements, the effects of the upstream stationary blade and the effects of Reynoldsnumber on the flow were considered.

[学科分类] 力学，机械学