The stall-prevention effect of air separators incorporating radial vanes in place of the existing axial vanes was investigated on a low-speed, single-stage, lightly loaded axial-flow fan for effective and compact air separators of a simplified structure. From the survey, paying attention to several geometrical dimensions of the device, the following conclusions are obtained: (1) Simplified radial vanes made of flat plates could show strong stall-prevention effect comparable to those of the curved-vane type one. The most favorable ones showed no stall up to the fan shut-off conditions. (2) Radial heights of the recirculation passage within the air separator showed significant influences on the stall improvement. It should be larger than some critical size experimentally given in the study. (3) The axial length of the device should be larger than some critical size given experimentally in the study. Too much reduced axial length could give rise to an abrupt loss in the effect. (4) The optimum axial locations of the rotor-tip blade leading edge within the device inlet opening were found to lie near the center of the width of the inlet opening from both aspects of stall improvement and fan efficiency.
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April 2010
Research Papers
Effects of Compact Radial-Vaned Air Separators on Stalling Characteristics of an Axial-Flow Fan
Nobuyuki Yamaguchi,
Nobuyuki Yamaguchi
Meisei University
, 2-1-1 Hodokubo, Hino-shi, Tokyo 191-8506, Japan
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Masayuki Ogata,
Masayuki Ogata
Meisei University
, 2-1-1 Hodokubo, Hino-shi, Tokyo 191-8506, Japan
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Yohei Kato
Yohei Kato
Japan Filter Technology, Ltd.
, I-1-1 Aza Sugise, Tsuhata-machi, Kawakita-gun, Ishikawa Prefecture 929-0454, Japan
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Nobuyuki Yamaguchi
Meisei University
, 2-1-1 Hodokubo, Hino-shi, Tokyo 191-8506, Japan
Masayuki Ogata
Meisei University
, 2-1-1 Hodokubo, Hino-shi, Tokyo 191-8506, Japan
Yohei Kato
Japan Filter Technology, Ltd.
, I-1-1 Aza Sugise, Tsuhata-machi, Kawakita-gun, Ishikawa Prefecture 929-0454, JapanJ. Turbomach. Apr 2010, 132(2): 021009 (8 pages)
Published Online: January 12, 2010
Article history
Received:
September 5, 2008
Revised:
November 27, 2008
Online:
January 12, 2010
Published:
January 12, 2010
Citation
Yamaguchi, N., Ogata, M., and Kato, Y. (January 12, 2010). "Effects of Compact Radial-Vaned Air Separators on Stalling Characteristics of an Axial-Flow Fan." ASME. J. Turbomach. April 2010; 132(2): 021009. https://doi.org/10.1115/1.3104613
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