Numerical analysis of heat pumping in oscillatory flows

Takao Koshimizu; Hiromi Kubota; Yasuyuki Takata; Takehiro Ito

doi:10.1299/kikaib.76.771_1924

Numerical analysis of heat pumping in oscillatory flows

Takao Koshimizu, Hiromi Kubota, Yasuyuki Takata, Takehiro Ito

Thermal Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	1924-1931
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	76
Issue number	771
DOIs	https://doi.org/10.1299/kikaib.76.771_1924
Publication status	Published - Nov 2010

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.76.771_1924

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title = "Numerical analysis of heat pumping in oscillatory flows",

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°.",

author = "Takao Koshimizu and Hiromi Kubota and Yasuyuki Takata and Takehiro Ito",

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T1 - Numerical analysis of heat pumping in oscillatory flows

AU - Koshimizu, Takao

AU - Kubota, Hiromi

AU - Takata, Yasuyuki

AU - Ito, Takehiro

PY - 2010/11

Y1 - 2010/11

N2 - 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°.

AB - 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°.

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Numerical analysis of heat pumping in oscillatory flows

Abstract

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