Estimation of parasitic losses in a proposed mesoscale resonant engine: Experiment and model

A resonant engine in which the piston-cylinder assembly is replaced by a flexible cavity is realized at the mesoscale using flexible metal bellows to demonstrate the feasibility of the concept. A four stroke motoring technique is developed and measurements are performed to determine parasitic losses...

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Bibliographic Details
Published in:Journal of applied physics 2014-02, Vol.115 (5)
Main Authors: Preetham, B. S., Anderson, M., Richards, C.
Format: Article
Language:English
Subjects:
Applied physics
Assembly
Bellows
Cylinders
Energy distribution
Energy flow
Parasitics (electronics)
Repair & maintenance
Sliding friction
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Summary:A resonant engine in which the piston-cylinder assembly is replaced by a flexible cavity is realized at the mesoscale using flexible metal bellows to demonstrate the feasibility of the concept. A four stroke motoring technique is developed and measurements are performed to determine parasitic losses. A non-linear lumped parameter model is developed to evaluate the engine performance. Experimentally, the heat transfer and friction effects are separated by varying the engine speed and operating frequency. The engine energy flow diagram showing the energy distribution among various parasitic elements reveals that the friction loss in the bellows is smaller than the sliding friction loss in a typical piston-cylinder assembly.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4864418