Numerical analysis of heat pumping in oscillatory flows

Takao Koshimizu, Hiromi Kubota, Yasuyuki Takata, Takehiro Ito

Research output: Contribution to journalArticle

Abstract

A numerical analysis has been performed to clarify how heat pumping in a regenerator is generated in oscillatory flows and to investigate the effect of heat pumping on the phase difference between pressure and velocity. Pulse tube refrigerators of the 1st and 2nd generations are used as physical models in this study. In the 1st generation, the phase difference between pressure and velocity is nearly 90° and in the 2nd generation, nearly 0°. Transient one-dimensional equations of continuity, momentum and energy are solved utilizing a TVD scheme. It was found that heat pumping in a regenerator is shown by analyzing the fields of velocity and temperature of gas elements without thermoacoustic theory. It was also found that heat pumping in a regenerator is enhanced when the phase difference between pressure and velocity is nearly 0°.

Original languageEnglish
Pages (from-to)1924-1931
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume76
Issue number771
DOIs
Publication statusPublished - Nov 2010

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

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