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Paper Abstract and Keywords
Presentation 2019-01-22 14:00
[Poster Presentation] Study on a coaxial thermoacoustic system with regionally expanded the outer tube diameter
Yukihiro Takeyama (Doshisha Univ.), Shin-ichi Sakamoto (Univ. of Shiga Pref.), Daichi Kuroki, Riku Onishi, Yoshiaki Watanabe (Doshisha Univ.) US2018-97
Abstract (in Japanese) (See Japanese page) 
(in English) Thermoacoustic systems can perform cooling and electric generation by using waste heat of factory and sunlight, so they can solve global environment problems. The present group is then studying the coaxial type thermoacoustic system (coaxial type) which is expected to be compact and to have wide applications. In a previous study, the position of a prime mover (PM) is modified to enhance the cooling ability of the coaxial type. In specified cases of the position of PM, the cooling ability improved. However, it is consider that completely occupying narrow channel of PM by the viscous boundary layer occurred the shift from the fundamental mode to the secondary mode. In this study, the boundary condition where the secondary mode hardly occurs was applied to the coaxial type to reduce the transition of the resonance mode. As the results, it is confirmed that the secondary mode decrease. In addition, the closed flow path in the narrow channel by increasing the viscous boundary layer does not occur.
Keyword (in Japanese) (See Japanese page) 
(in English) Thermoacoustic phenomenon / Coaxial system / Resonance mode / Viscous boundary layer / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 409, US2018-97, pp. 91-94, Jan. 2019.
Paper # US2018-97 
Date of Issue 2019-01-15 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EA US  
Conference Date 2019-01-22 - 2019-01-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Doshisha Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonics, and Related Topics 
Paper Information
Registration To US 
Conference Code 2019-01-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on a coaxial thermoacoustic system with regionally expanded the outer tube diameter 
Sub Title (in English)  
Keyword(1) Thermoacoustic phenomenon  
Keyword(2) Coaxial system  
Keyword(3) Resonance mode  
Keyword(4) Viscous boundary layer  
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1st Author's Name Yukihiro Takeyama  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Shin-ichi Sakamoto  
2nd Author's Affiliation University of Shiga Prefecture (Univ. of Shiga Pref.)
3rd Author's Name Daichi Kuroki  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
4th Author's Name Riku Onishi  
4th Author's Affiliation Doshisha University (Doshisha Univ.)
5th Author's Name Yoshiaki Watanabe  
5th Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2019-01-22 14:00:00 
Presentation Time 120 minutes 
Registration for US 
Paper # US2018-97 
Volume (vol) vol.118 
Number (no) no.409 
Page pp.91-94 
#Pages
Date of Issue 2019-01-15 (US) 


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