Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Computational Thermo-Fluid Analysis for the Effects of Helium Injection Methods on Glass Fiber Cooling Process in an Optical Fiber Manufacturing System

광섬유 냉각장치의 헬륨 주입기 설계를 위한 전산열유동해석

  • Park, Shin (Department of Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Kim, Kyoungjin (Department of Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Kim, Dongjoo (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Park, Junyoung (Department of Mechanical Design Engineering, Kumoh National Institute of Technology) ;
  • Kwak, Ho Sang (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
  • 박신 (금오공과대학교 기계시스템학과) ;
  • 김경진 (금오공과대학교 기계시스템학과) ;
  • 김동주 (금오공과대학교 기계공학과) ;
  • 박준영 (금오공과대학교 기계설계공학과) ;
  • 곽호상 (금오공과대학교 기계시스템학과)
  • Published : 2014.04.30
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Abstract

In a mass manufacturing system of optical fibers, the sufficient cooling of glass fibers freshly drawn from a draw furnace is essential, asinadequately cooled glass fibers can lead to poor resin coating on the fiber surface and possibly fiber breakage during the process. In order to improve fiber cooling at a high drawing speed, it is common to use a helium injection into a glass fiber cooling unit in spite of the high cost of the helium supply. The present numerical analysis carried out three-dimensional thermo-fluid computations of the cooling gas flow and heat transfer on moving glass fiber to determine the cooling performance of glass fiber cooling depending on the method of helium injection. The results showed that afront injection of helium is most effective compared to a uniform or rear injection for reducing air entrainment into the unit and thus cooling the glass fibers at a high fiber drawing speed. However, above a certain amount of injected helium, there was no more increase of the cooling effect regardless of the helium injection method.

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References

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