| Budget Amount *help |
¥13,780,000 (Direct Cost: ¥10,600,000、Indirect Cost: ¥3,180,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
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| Outline of Final Research Achievements |
This project aims at establishing theoretical framework to deal with nonlinear behaviors in thermoacoustic phenomena resulting from instability of heat flow, and also at making experiments to verify the theoretical findings. The framework of theoretical treatments of weakly nonlinear wave propagation in a flow passage subjected to a temperature gradient has been established. The theories are expected to be applicable to quantitative clarification of emergence of self-excited oscillations including shock waves and acoustic streamings. In parallel, experiments are performed by using a closed, straight tube and a looped tube, in which a heat flow is produced by imposing a temperature gradient on a stack. The experimental results are checked against the theories. In addition, electricity generation from self-excited oscillations is also attempted in view of one means of energy harvesting.
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