自励振動型ヒートパイプにおけるカオス振動流れの計測(J13-7 渦励振I,J13 流体関連の騒音と振動)

概要

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In this paper, presented is an experimental study of thermal flow-induced vibration in a 3-turn looped heat pipe. Pressure and temperature variation inside the tubes was measured to investigate the oscillation mechanism. It was heated and cooled at the bottom and the top to control temperature by circulator, respectively. As a result of experiment, in a certain experimental conditions, circulating direction, clockwise and counterclockwise mode, was hind to change irregularly, which was identified by inner temperature variation at heat section Dominant frequency of the temperature variation was dependent on the circulating direction, according to wavelet analysis results. Moreover, chaos analysis was applied to this temperature variation, and then it could be a chaotic variation in terms of attractor dimensions, Lyapnov exponents and trajectory.
2004-09-04