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International Journal of Automotive Technology > Volume 12(2); 2011 > Article
International Journal of Automotive Technology 2011;12(2): 307-314.
DEVELOPMENT OF A LOW-NOISE COOLING FAN FOR AN ALTERNATOR USING NUMERICAL AND DOE METHODS
W. KIM1, W. -H. JEON2, N. HUR3, J.-J. HYUN4, C.-K. LIM4, S.-H. LEE4
1Graduate School of Sogang University
2CEDIC
3Sogang University
4Korea Delphi Automotive Company
ABSTRACT
An alternator, which converts mechanical rotational energy into electrical energy, is an important component of a vehicle. Alternators operate over a broad range of rotational speeds, typically from 3,000 RPM to 18,000 RPM, which demands a cooling fan producing sufficient airflow, ideally with a minimum of noise. In the current study, an optimized alternator-cooling fan was developed through a linked DOE(Design OF Experiment) process and numerical analysis. The SC/ Tetra and FlowNoise S/W programs were used to calculate flow rates and noise levels, respectively, for the newly developed fan. Compared with original model, the numerical results predicted a 3 dBA noise reduction; the measured reduction was 4 dBA.
Key Words: Fan, Noise, Alternator, CFD, DOE
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