Nomoto, Hideki (1980) Acoustic waves generated by vortex shedding. Engineer's thesis, California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-12282005-110713
An internal flow self-sustained oscillation system, which consists of a two-dimensional duct and a pair of baffles inside, is investigated experimentally. This system produces a high amplitude pure tone when certain flow and geometrical conditions are satisfied. The frequency of this generated tone seems to be determined by the longitudinal acoustic modes of the duct, while the dependence of pure tone production on flow and geometrical conditions seems to be related to the interaction between vortex shedding and acoustic feed back mechanism.
Some features on self-sustained oscillation systems are reviewed briefly and Rossiter's idea on the cavity tone system is applied for interpretation of the mechanism of the pure tone production.
Flow visualization shows stable vortical structure of the flow between the baffles when a pure tone is produced.
|Item Type:||Thesis (Engineer's thesis)|
|Degree Grantor:||California Institute of Technology|
|Division:||Engineering and Applied Science|
|Thesis Availability:||Restricted to Caltech community only|
|Defense Date:||1 May 1980|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Imported from ETD-db|
|Deposited On:||29 Dec 2005|
|Last Modified:||26 Dec 2012 03:15|
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