This paper describes the design of a mechanical resonator for a thermoacoustic Stirling-engine. The engine was previously run with a quarter-wavelength acoustic resonator. The advantage of the mechanical resonator is that it is compact and would dissipate less acoustic power. The mechanical resonator consists of a twin piston-spring assembly moving in opposite phase to cancel vibrations. The system uses flexure springs to suspend the piston in a cylinder leaving a narrow gap between them. The narrow gap acts as a dynamic seal between the fronts and back sides of the piston. Simulation calculations show that the mechanical resonator dissipates 40% less acoustic power than the acoustic one. This will lead to more useful acoustic power output from the thermoacoustic Stirling-engine. In addition, the size of the system is reduced considerably.
- Fluids Engineering Division
Design of a Mechanical Resonator to Be Coupled to a Thermoacoustic Stirling-Engine
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Tijani, MEH, Vanapalli, S, & Spoelstra, S. "Design of a Mechanical Resonator to Be Coupled to a Thermoacoustic Stirling-Engine." Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 2, Fora. Montreal, Quebec, Canada. August 1–5, 2010. pp. 117-121. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-31151
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