Selective Amplification of Complex-sound in Cylindrical Pipe by Using Thermoacoustic Effect
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- KYODEN Tomoaki
- Department of Maritime Technology, National Institute of Technology, Toyama College
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- TADA Yukio
- Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University
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- IIDA Yuya
- Department of Maritime Technology, National Institute of Technology, Toyama College
Bibliographic Information
- Other Title
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- 熱音響現象を利用した円筒管内複合音波の選択的増幅
Abstract
<p>The object of this paper is to investigate thermoacoustic refrigerator driven by noise energy and waste heat generated from engine plants. The noise has complicated frequency characteristics and low energy density. Therefore, the selective amplification of acoustic wave by using thermoacoustic energy conversion has been studied. The stacked wire-mesh screen with steep temperature gradient was installed in the one-third length of pipe with one closed end. In experiments, the pressure, particle velocity, and phase difference were measured by varying the frequency of acoustic wave and the channel size of the stack. The acoustic wave at third harmonic-frequency was amplified by thermoacoustic effect. On the other hand, the acoustic waves at other frequency were damping by viscosity dissipation in the stack. The optimum size of aperture in the stack for thermoacoustic amplification was also depicted. Summarizing these results, the proposed selective amplification was tested for noise energy generated in marine ship.</p>
Journal
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- Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers
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Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers 39 (4), 249-, 2022-12-31
Japan Society of Refrigerating and Air Conditioning Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390580143067984000
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- ISSN
- 2185789X
- 13444905
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- Text Lang
- ja
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- Data Source
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- JaLC
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- Abstract License Flag
- Disallowed