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International Journal of Rotating Machinery
Volume 10, Issue 5, Pages 415-424

Study on the Performance of a Sirocco Fan (Flow Around the Runner Blade)

1Department of Mechanical Engineering for Transportation, Osaka Sangyo University, Osaka, Japan
2Toshiba Corporation, Tokyo, Japan
3Department of Mechanical Engineering for Transportation, Osaka Sangyo University, 3-1-1, Nakagaito Daito, Osaka 574-8530, Japan

Copyright © 2004 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Initially in this research, effects of blade inlet and outlet angles on the performance were considered by measuring performances. Twelve impellers with various blade angles were used for the measurements. The most suitable inlet and outlet angles and the inclination angle were acquired. Then, measurements on the inlet and outlet flows and their axial and circumferential distributions were taken for various operating conditions at the various measuring positions. The turning angles through the blade were calculated from these measured results. The inlet and outlet flows of the sirocco fan are not uniform around the circumference. The distributions of the flow have some relations with the development of flow in the inlet part and in the casing. Discussions were made on the flow to have a improved performance.