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TECHNICAL PAPERS

On Cross-Flow Fan Theoretical Performance and Efficiency Curves: An Energy Loss Analysis on Experimental Data

[+] Author and Article Information
Andrea Toffolo

Department of Mechanical Engineering, University of Padova, Via Venezia, 1-35131 Padova, Italye-mail: andrea.toffolo@unipd.it

J. Fluids Eng 126(5), 743-751 (Dec 07, 2004) (9 pages) doi:10.1115/1.1792268 History: Received January 07, 2004; Revised May 12, 2004; Online December 07, 2004
Copyright © 2004 by ASME
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References

Lazzarotto,  L., Lazzaretto,  A., Macor,  A., and Martegani,  A. D., 2001, “On Cross-Flow Fan Similarity: Effects of Casing Shape,” ASME J. Fluids Eng., 123, pp. 523–531.
Lazzaretto,  A., Toffolo,  A., and Martegani,  A. D., 2003, “A Systematic Experimental Approach to Cross-Flow Fan Design,” ASME J. Fluids Eng., 125, pp. 684–693.
Toffolo, A., Lazzaretto, A., and Martegani, A. D., 2004, “An Experimental Investigation of the Flow Field Pattern Within the Impeller of a Cross-Flow Fan,” accepted for publication in Experimental Thermal and Fluid Science, available on-line at www.sciencedirect.com.
Lazzaretto,  A., 2003, “A Criterion to Define Cross-Flow Fan Design Parameters,” ASME J. Fluids Eng., 125, pp. 680–683.
Toffolo, A., 2004, “On the Theoretical Link Between Design Parameters and Performance in Cross-Flow Fans: a Numerical and Experimental Study,” accepted for publication in Computers and Fluids, available on-line at www.sciencedirect.com.
Toffolo,  A., Lazzaretto,  A., and Martegani,  A. D., 2004, “Cross-Flow Fan Design Guidelines for Multi-Objective Performance Optimization,” J. Power Energy (PIME part A),218, pp. 33–42.
Eck, B., 1973, Fans, Pergamon, New York.
Moore, A., 1972, “The Tangential Fan—Analysis and Design,” Conference on Fan Technology and Practice, 18–19 April, London, IMechE, pp. 66–82.
Coester, R., 1959, “Theoretische und Experimentelle Untersuchungen an Querstromgeblase,” Mitteilungen aus dem Institut fur Aerodynamic ETH, 28.
Tramposch, H., 1964, “Cross-Flow Fan,” ASME Paper No. 64-WA/FE-25.
Ilberg,  H., and Sadeh,  W. Z., 1965, “Flow Theory and Performance of Tangential Fans,” Proc. Inst. Mech. Eng., 180, Part 1, p. 19.
Ikegami,  H., and Murata,  S. A., 1966, “Study of Cross Flow Fan. I. A Theoretical Analysis,” Technol. Rep. Osaka Univ., 16, pp. 557–578.
Yamafuji,  K., 1975, “Studies on the Flow of Cross-Flow Impellers—2nd Report, Analytical Study,” Bull. JSME, 18, No. 126, pp. 1425–1431.
Porter,  A. M., and Markland,  E., 1970, “A Study of the Cross Flow Fan,” J. Mech. Eng. Sci., 12, No. 6, pp. 421–431.
Tuckey, P. R., Holgate, M. J., and Clayton, B. R., 1982, “Performance and Aerodynamics of a Cross Flow Fan,” International Conference on Fan Design and Applications, September 7–9, Guilford, England, Paper No. J3.
Allen, D. J., 1982, “The Effect of Rotor and Casing Design on Cross-Flow Fan Performance,” International Conference on Fan Design and Applications, September 7–9, Guilford, England, Paper No. J1.
Clayton,  B. R., 1975, “A Review and Appraisal of Crossflow Fans,” Building Services Engineer,42, pp. 230–247.
UNI 10531, Ventilatori Industriali-Metodi di Prova e Condizioni di Accettazione (in Italian), Milan, 1995.
ISO 5801, Industrial Fans-Performance Testing using Standardized Airways, 1993.

Figures

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A cross-flow fan configuration
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Theoretical and actual characteristic curve according to Eck’s theory 7
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The most significant parameters affecting fan performance and efficiency
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The casing shapes selected for the analysis
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Definition of the normalized stream function f
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Example of the local total pressure coefficient along the external circumference of the impeller
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Example of the ratio between the tangential velocity and the peripheral speed along the external circumference of the impeller
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The total pressure coefficient and the ratio cu2/u2 along the impeller external circumference at different flow coefficients for a sample configuration
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Total efficiency and estimation of the volumetric and hydraulic efficiencies for the considered configurations at different flow coefficients
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Actual and theoretical performance curves of the considered configurations at different flow coefficients

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