Abstract
It is required that the stall control in the impeller and/or diffuser of the centrifugal fen and compressor for operating range expansion. Particularly in the open impeller, it is considered that tip leakage flow which occurs between impeller tips and casing shroud causes loss and stall which affect at performance of centrifugal fan and compressor. In this study, for open impeller of centrifugal fan, we performed unsteady numerical analysis and examined the influence of tip leakage flow on the stall of an impeller at low flow rate.
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