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Technical Briefs

Energy Efficiency of an Axial Fan for Various Casing Configurations

[+] Author and Article Information
Alain Guedel

e-mail: alain.guedel@cetiat.fr

Mirela Robitu

e-mail: mirela.robitu@cetiat.fr
CETIAT,
25 avenue des Arts,
B.P. 2042, Villeurbane 69100,France

Vivian Chaulet

Ziehl-Abegg FMV,
Rue de la Gare,
Villieu 01800,France
e-mail: v.chaulet@ziehl-abegg.fr

1Corresponding author.

Contributed by the Turbomachinery Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received July 17, 2012; final manuscript received September 25, 2012; published online June 12, 2013. Editor: David Wisler.

J. Eng. Gas Turbines Power 135(7), 074501 (Jun 12, 2013) (5 pages) Paper No: GTP-12-1284; doi: 10.1115/1.4023751 History: Received July 17, 2012; Revised September 25, 2012

The objective of this paper is to compare the measured and predicted performances of a tubeaxial fan for several casing configurations that are commonly proposed by fan manufacturers to their clients. This work is motivated by the European Commission Regulation 327/2011, which will impose target energy efficiency for fans driven by electric motors beginning 1 January 2013. The prediction is made with the computational fluid dynamics (CFD) commercial code STAR-CCM+. The agreement between the experimental and numerical results on fan performance curves is very satisfactory, which confirms that CFD simulations may advantageously replace testing in parametric studies since they predict the quantitative differences of aerodynamic performance observed experimentally between the different casing configurations quite well. Numerical simulations may, therefore, help manufacturers to improve the geometry of their fans in order to fulfill the requirements of the regulation.

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Figures

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Fig. 1

Impeller and casing with the motor and its support

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Fig. 3

(a) Measured static pressure curves, and (b) measured overall static efficiency curves

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Fig. 4

Calculation domain mesh (a) magnified view of the mesh in the blade area, and (b) the volume mesh

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Fig. 5

Comparison of measured and predicted results—long casing with bellmouth: (a) static pressure, (b) motor input power, and (c) overall static efficiency (simulation 1: ≈2000 iterations; simulation 2: ≈20,000 iterations)

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