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Space Vehicle Fan Package Acoustic Characteristics
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English
Abstract
As the space program transitions to longer duration manned missions, the need to provide a quieter environment assumes increased importance. Fans are a significant noise source and require special acoustic attention. Effective optimization of a quiet fan package involves trade-offs between fan source noise and muffler design. This paper addresses the impact of fan speed on source noise acoustic profile, power and volume. It further addresses muffler characteristics to be included in the trade study and resulting design. For the ISS Avionics Air Assembly, this trade-off resulted in a 50,000 rpm air bearing fan design. This paper addresses the acoustic source noise of both a 30 cfm design and a 130 cfm design. The cooling packages containing these fans meet NC-40 and NC-45 respectively.
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Citation
O'Connor, E., "Space Vehicle Fan Package Acoustic Characteristics," SAE Technical Paper 951647, 1995, https://doi.org/10.4271/951647.Also In
References
- O'Connor, E. Nason R. Rubalcaba D. Klym J. “Space Station Distributed Avionics Air Cooling” SAE Paper 941493 24th International Conference on Environmental Systems Friedrichshafen, Germany June 20-23 1994
- Balje, O. E. “A Study on Design Criteria and Matching of Turbomachines: Part B - Compressor and Pump Performance and Matching of Turbocomponents” Journal of Engineering for Power January 1962 103 114
- Harris, C. M. “Handbook of Acoustical Measurement and Control” Mc-Graw Hill New York 1991
- O'Connor, E. Rubalcaba D. Klym J. Korin R. “Space Station Freedom Distributed Avionics Air” SAE Paper 932279 23rd International Conference on Environmental Systems Colorado Springs, Co. July 12-15 1993
- Beranek, L. L. Ver I. L. “Noise and Vibration Control Engineering - Principles and Applications” John Wiley and Sons New York 1992