Development of combustion-driven small thermoacoustic engine


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Dr. Jeongmin Ahn
Email: ahn@mme.wsu.edu
Lab: ETRL 209
Lab Tel: 509-335-5978
FAX: 509-335-4662

Miniature thermoacoustic engines driven by combustion and producing electricity are promising candidates for small-scale power devices. The elemental development of the system including a small thermoacoustic engine and a Swiss roll combustor is discussed in this work. A standing-wave thermoacoustic prime mover consists of a resonator with a stack of porous material inside where a temperature gradient is maintained. This engine generates acoustic power from heat. The sound energy can be converted in electricity by an electroacoustic transformer. The Swiss roll combustor utilizes the high energy density of hydrocarbon fuels in order to provide the necessary heat transfer required to generate acoustic power from the engine. Some results of this developmental study are presented.

Demonstration movie 1

Demonstration movie 2

Demonstration movie 3

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Figure 1: Structure of thermoacoustic engine

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Figure 3: Example of temperature and pressure profiles of thermoacoustic engine.

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Figure 2: Assembled engine with and without cooling jacket

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Figure 4: 3-D schematics of an integrated combustion-driven thermoacoustic engine with VespelTM Swiss roll combustor.

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