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Paper Abstract and Keywords
Presentation 2022-02-10 15:35
Investigation by numerical simulation of flow velocity of air blowing to electrical contact gap and its effect on break arcs
Takashige Okuno, Junya Sekikawa (Shizuoka Univ.) R2021-45 EMD2021-13
Abstract (in Japanese) (See Japanese page) 
(in English) In the interruption of DC high voltage circuits, it is desirable to extinguish the arc at the opening of the contacts in as short a time as possible. In this study, the duration of the opening arc was shortened by blowing air across the electrical contact pair. The position of the opening arc in the gap between the electrical contacts and the velocity of the flow were analyzed numerically. As a result, when air is blown into the contact gap from the side, the time required for the lower edge of the opening arc to reach 1 mm downwind from the center of the contact becomes shorter as the flow rate of the air blowing increases, but the range of the time reduction becomes smaller. The velocity at the center of the arc when the lower end of the arc was 1 mm downwind from the center of the contact increased with the flow rate. Comparing the velocities at the center of the contact point and at 1 mm downwind from the center of the contact point for each flow rate, the velocity at the center of the contact point was larger for all flow rates.
Keyword (in Japanese) (See Japanese page) 
(in English) DC circuit / Break arc / Air blowing / Numerical calculation / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 369, EMD2021-13, pp. 12-17, Feb. 2022.
Paper # EMD2021-13 
Date of Issue 2022-02-03 (R, EMD) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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)
Download PDF R2021-45 EMD2021-13

Conference Information
Committee R EMD  
Conference Date 2022-02-10 - 2022-02-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2022-02-R-EMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation by numerical simulation of flow velocity of air blowing to electrical contact gap and its effect on break arcs 
Sub Title (in English)  
Keyword(1) DC circuit  
Keyword(2) Break arc  
Keyword(3) Air blowing  
Keyword(4) Numerical calculation  
1st Author's Name Takashige Okuno  
1st Author's Affiliation Shizuoka University (Shizuoka Univ.)
2nd Author's Name Junya Sekikawa  
2nd Author's Affiliation Shizuoka University (Shizuoka Univ.)
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Date Time 2022-02-10 15:35:00 
Presentation Time 25 
Registration for EMD 
Paper # IEICE-R2021-45,IEICE-EMD2021-13 
Volume (vol) IEICE-121 
Number (no) no.368(R), no.369(EMD) 
Page pp.12-17 
#Pages IEICE-6 
Date of Issue IEICE-R-2022-02-03,IEICE-EMD-2022-02-03 

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