2009 Fiscal Year Final Research Report
Observation of local energy conversion and entropy production in a thermoacoustic heat engine
| Project/Area Number |
20760044
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied physics, general
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| Research Institution | Tohoku University |
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Principal Investigator |
BIWA Tetsushi Tohoku University, 大学院・工学研究科, 准教授 (50314034)
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| Project Period (FY) |
2008 – 2009
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| Keywords | 流体 / 熱工学 / エネルギー変換 / 熱音響工学 / エントロピー生成 |
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| Research Abstract |
Thermoacoustic energy conversion was experimentally studied through simultaneous measurements of pressure, velocity, and temperature oscillations in a gas-filled tube with axial temperature gradient. The phase difference between pressure and velocity was found out to be a key parameter governing the phasing of thermodynamic processes constituting a thermodynamic cycle. Also, the axial work flow (acoustic power) was found to increase in proportional to the local energy conversion rate that the gas executed. This results supports the thermodynamic approach to thermoacoustic phenomena.
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