Vibration induced in engine hardware by a working fluid can be very significant in high-power, high-amplitude acoustic heat engines, and is a serious impediment to their practical use. This vibration can cause fatigue and destruction of engine components as well as fuel lines, cooling lines, and sensor wires. The forces involved make anchoring such an engine to an “immovable” object impractical. Rigidly attaching two such engines together, and acoustically coupling them with a duct of such a length and diameter that the two engines mode-lock in antiphase (thus canceling the longitudinal vibration) appears to be an inexpensive, viable solution. This paper describes in detail experiments demonstrating the feasibility of this idea, and the underlying theory.
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September 1999
September 01 1999
Mode-locking of acoustic resonators and its application to vibration cancellation in acoustic heat engines
P. S. Spoor;
P. S. Spoor
Condensed Matter and Thermal Physics Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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G. W. Swift
G. W. Swift
Condensed Matter and Thermal Physics Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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J. Acoust. Soc. Am. 106, 1353–1362 (1999)
Article history
Received:
February 10 1999
Accepted:
June 10 1999
Citation
P. S. Spoor, G. W. Swift; Mode-locking of acoustic resonators and its application to vibration cancellation in acoustic heat engines. J. Acoust. Soc. Am. 1 September 1999; 106 (3): 1353–1362. https://doi.org/10.1121/1.427169
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