Document Detail

Computational aeroacoustic modeling of rotary mower noise.
MedLine Citation:
PMID:  18189685     Owner:  NLM     Status:  In-Data-Review    
The primary source of noise from rotary mowing machines is the aeroacoustic sound generated by the cutting blades. The requirements for maintaining high quality of the cut contradict those for reducing noise from the blade. The key to balancing these competing requirements is understanding the aeroacoustics of blades within the cutting environment. Until recently, there has been no reliable way to predict the noise generated by a configuration of blades and housing decks. To address this, John Deere and its partners have undertaken a program in Computational Aero-Acoustics (CAA). By leveraging existing computational fluid dynamics and parallel processing capabilities, the participation of several software vendors, and the cooperation of industrial and academic partners, this project has provided a capability to accurately predict the sound generated by low Mach number flows in industrial systems. This presentation reviews the results of applying a nascent CAA capability. The noise generated by a single-blade walk-behind mower was computed and compares successfully with laboratory tests of radiated sound from the mower. Details of the computational process and the results will be presented.
Karl Washburn; Christopher Peak; Robert Sandboge
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  122     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2008-01-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2963     Citation Subset:  IM    
John Deere Moline Technol. Innovation Ctr., One John Deere Pl., Moline, IL, 61265John Deere SouthEast Eng. Ctr., Charlotte, NC 28273Pioneer Solutions, Inc., Northville, MI 48167.
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