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Development of Low Noise Blower Fan
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Sector:
Language:
English
Abstract
Noise reduction of Automotive HVAC systems is a hard task because of the highly complicated and very sensitive turbulent flow in the blower fan unit. First, we identified the location of noise sources by the Sound Intensity (SI) method, then we investigated the flow pattern by the oil-mist method. As a result, two main noise generation mechanisms have been identified. One mechanism is generated by the interaction of the strong steady flow of air in the unit with the fan wheel, and the other is from the turbulent flow between the fan blades.
Results:
A new fan blade design was developed that had improved control of the turbulent flow, and which configuration caused a noise reduction of 2 dB-A over current blown fan systems.
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Authors
Citation
Saeki, N., Kamiyama, K., Uomoto, M., and Ishihara, Y., "Development of Low Noise Blower Fan," SAE Technical Paper 971842, 1997, https://doi.org/10.4271/971842.Also In
References
- Ikui et al ‘Turbo blower and compressor’ KORONA Pub.
- Ootsuta ‘Low noise development of HVAC system’ 1992 Lecture materials of JSAE
- Saeki N. et al ‘Investigation of sound source of blower fan’ Proceedings of Asia Visualization Symposium in '96
- Kondo et al ‘Development of low noise cirroco fan for an air-conditioner of the car Proceedings of JSAE conference 941 1994-5
- Abbott I. H. et al ‘Theory of wing sections’ 1959 Dover Publication, Inc.