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TECHNICAL BRIEFS

Total Unsteadiness Downstream of an Axial Flow Fan With Variable Pitch Blades

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

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

J. Fluids Eng 124(1), 280-283 (Sep 10, 2001) (4 pages) doi:10.1115/1.1427926 History: Received November 03, 2000; Revised September 10, 2001
Copyright © 2002 by ASME
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References

Goto,  A., 1992, “Three-dimensional flow and mixing in an axial flow compressor with different rotor tip clearances,” ASME J. Turbomach., 114, pp. 675–685.
Moore, J., and Moore, J. G., 1998, “Turbulence energy and spectra downstream of an axial compressor rotor,” AIAA Paper No. 98-2550.
Liu, B., Moore, J. G., and Moore, J., 1998, “Total unsteadiness downstream of an axial compressor rotor,” AIAA Paper No. 98-0967.
Marples, J., “A Discussion of Fan Air Quantity Control with Particular Respect to Axial Flow Fans and Variable Pitch Mechanisms,” Proceedings of the BHRA International Conference on Fan Design & Applications, paper K2, pp. 445–459, Guilford, England, 1982.
O’Neill, A. C., “Variable Pitch Axial Flow Fans,” Proceedings of the BHRA International Conference on Fan Design & Applications, paper K3, pp. 461–499, Guilford, England, 1982.
Wallis, R. A., 1993, Axial Flow Fans and Ducts, Krieger Publishing Company, Malabar, Florida.
Ballesteros, R., Blanco, E., and Santolaria, C., 1995, “Blade Pitch Influence at the Exit Flow Field of an Axial Flow Fan,” ASME Paper No. 95-GT-191.
Blanco,  E., Ballesteros,  R., and Santolaria,  C., 1998, “Angular range and uncertainty analysis of non-orthogonal crossed hot wire probes,” ASME J. Fluids Eng., 120, pp. 90–94.

Figures

Grahic Jump Location
Radial distribution of the velocity components at rotor exit (design pitch angle)
Grahic Jump Location
Radial distribution of the velocity components at rotor exit (best efficiency point)
Grahic Jump Location
Radial distribution of the total unsteadiness parameter at rotor exit (design pitch angle)
Grahic Jump Location
Radial distribution of the total unsteadiness parameter at rotor exit (best efficiency point)
Grahic Jump Location
Power spectra of the axial component of velocity fluctuation at rotor exit (Nom. −4.5 deg, best efficiency point)
Grahic Jump Location
Blade-to-blade distribution of the axial component of velocity and phase-locked total unsteadiness at rotor exit (nominal pitch blade angle, best efficiency point)

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