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Study on Characteristics of Thermal Flow-Induced Vibration in Unlooped Heat Pipe

[+] Author Affiliations
Souichi Saeki, Shinichi Fujinaka, Kakuji Ogawara

Yamaguchi University, Ube-shi, Yamaguchi, Japan

Paper No. FEDSM2003-45462, pp. 27-32; 6 pages
doi:10.1115/FEDSM2003-45462
From:
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME

abstract

In this paper, presented is an experimental study of thermal flow-induced vibration in a both-ends-closed type self-induced oscillating heat pipe. This was made of winding glass tube to visualize the phenomenon. It was heated at the bottom to control temperature by heater, while was cooled at the top to keep temperature constant. Liquid column oscillation was excited with boiling and expansion of vapor plug. When liquid volume fraction was large, the magnitude of pressure oscillation was large and low frequency was relatively dominant. Furthermore, normalized temperature θt was proposed to investigate the threshold of excited conditions, taking account of initial condition, e.g. initial pressure. With respect to liquid volume fraction, θt was alternately varied up and down. This phenomenon was evaluated to be dependent on the liquid volume fraction.

Copyright © 2003 by ASME

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