| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
The object of this paper is to present thermoacoustic conversion device applied for noise energy generated. The noise is composed by multi-frequency sound waves and low energy density. Therefore, we demonstrated the selective amplification of acoustic power by utilizing thermoacoustic effect. The stacked mesh-screens with steep temperature gradient were installed in the one-third length of pipe. It was found that sound at third harmonic-frequency was amplified by thermoacoustic effect, and the sounds at other frequency were attenuated by viscosity dissipation in the stack. Summarizing these results, the performance of proposed selective amplification was clarified in relation to acoustic intensity.
And then, to study the improvement of performance in a looped-tube-type thermoacoustic cooler with branch resonator by additional bypass-looped tube with stack as the double loop-tube-type thermoacoustic cooler.
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