Thermal diffusion effect of a regenerator with complex flow channels
| Autor: | Mariko Senga, Shinya Hasegawa, Yutaro Ashigaki |
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| Rok vydání: | 2016 |
| Předmět: |
Thermal efficiency
Materials science Thermoacoustics Energy Engineering and Power Technology Thermodynamics Thermal diffusivity Sound power 01 natural sciences Industrial and Manufacturing Engineering Physics::Fluid Dynamics Flow (mathematics) 0103 physical sciences Regenerative heat exchanger Potential flow 010306 general physics 010301 acoustics Oscillatory flow |
| Zdroj: | Applied Thermal Engineering. 104:237-242 |
| ISSN: | 1359-4311 |
| DOI: | 10.1016/j.applthermaleng.2016.05.023 |
| Popis: | The thermal diffusion effect caused by an oscillatory flow has a large effect on the thermal efficiency of a thermoacoustic engine. This study measures and compares the thermal diffusion effect caused by an oscillatory flow in regenerators with uniform and complex flow channels. In an experiment, a maximum heat flow originating from the thermal diffusion effect of 10.0 W is observed during the input of 0.1 W acoustic power in a regenerator with uniform flow channels at a temperature difference in the regenerator ΔT = 100 K. Im[gD], which is a parameter that governs the thermal diffusion effect, is found from the heat flow obtained in the experiment. Consequently, thermoacoustic theory for both regenerators with uniform and complex flow channels shows a good agreement. This result indicates that the regenerator with the random flow channels is equivalent to that with the uniform flow channels. Predicting the thermal diffusion effect according to the oscillatory flow is also possible. |
| Databáze: | OpenAIRE |
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