Numerical Investigations of Slip Phenomena in Centrifugal Compressor Impellers

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Title:	Numerical Investigations of Slip Phenomena in Centrifugal Compressor Impellers
Authors:	黃建民
Contributors:	冷凍空調與能源系
Date:	2013-03
Issue Date:	2017-09-28 13:42:16 (UTC+8)
Abstract:	This study systematically investigates the slip phenomena in the centrifugal air compressor impellers by CFD. Eight impeller blades for different specific speeds, wrap angles and exit blade angles are designed by compressor design software to analyze their flow fields. Except for the above three variables, flow rate and number of blades are the other two. Results show that the deviation angle decreases as the flow rate increases. The specific speed is not an important parameter regarding deviation angle or slip factor for general centrifugal compressor impellers. The slip onset position is closely related to the position of the peak value in the blade loading factor distribution. When no recirculation flow is present at the shroud, the variations of slip factor under various flow rates are mainly determined by difference between maximum blade angle and exit blade angle, Δβmax-2. The solidity should be of little importance to slip factor correlations in centrifugal compressor impellers. © 2013 by Walter de Gruyter Berlin Boston. (18 refs)
Relation:	International Journal of Turbo & Jet-Engines
Appears in Collections:	[Department of Refrigeration & Air Conditioning] 【冷凍空調與能源系】期刊論文

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