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TECHNICAL PAPERS

Unsteady Flow Pattern Characteristics Downstream of a Forward-Curved Blades Centrifugal Fan

[+] Author and Article Information
Sandra Velarde-Suárez, Rafael Ballesteros-Tajadura, Carlos Santolaria-Morros

José González-Pérez

Universidad de Oviedo, Área de Mecánica de Fluidos, Campus de Viesques, 33271 Gijón Asturias, Spain

J. Fluids Eng 123(2), 265-270 (Dec 11, 2000) (6 pages) doi:10.1115/1.1351175 History: Received August 12, 1999; Revised December 11, 2000
Copyright © 2001 by ASME
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References

Figures

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Total differential pressure and efficiency versus flow rate
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Shaft power and SWL versus flow rate
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Measurements points and absolute velocity at impeller outlet, 0.7×Qo
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Mean relative flow angle closer to impeller outlet (with respect to the tangential direction; radial location RI=1.05 R2)
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Circumferential distribution of velocity unsteadiness in the radial direction (radical location RI=1.05 R2)
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Circumferential distribution of velocity unsteadiness in the tangential direction (radial location RI=1.05 R2)
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Circumferential distribution of velocity unsteadiness in the radial direction (radial location RE=1.2 R2)
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Circumferential distribution of velocity unsteadiness in the tangential direction (radial location RE=1.2 R2)
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Blade-to-blade distribution of mean radial component of velocity and velocity unsteadiness in the radial direction at the position 6 I
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Blade-to-blade distribution of mean tangential component of velocity and velocity unsteadiness in the tangential direction at the position 6 I
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Blade-to-blade distribution of mean radial component of velocity and velocity unsteadiness in the radial direction at the position 12 I
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Blade-to-blade distribution of mean tangential component of velocity and velocity unsteadiness in the tangential direction at the position 12 I
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Power spectrum of velocity fluctuation in the tangential direction at the position 6 I, 0.4×Qo
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Power spectrum of velocity fluctuation in the tangential direction at the position 12 I, 0.4×Qo
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Power spectrum of velocity fluctuation in the tangential direction at the position 6 E, 0.4×Qo
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Power spectrum of velocity fluctuation in the tangential direction at the position 12 E, 0.4×Qo

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