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CLC number: TK124

On-line Access: 2013-06-03

Received: 2013-03-11

Revision Accepted: 2013-04-19

Crosschecked: 2013-05-16

Cited: 6

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2013 Vol.14 No.6 P.427-434


Influence of compression-expansion effect on oscillating-flow heat transfer in a finned heat exchanger*

Author(s):  Ke Tang, Juan Yu, Tao Jin, Zhi-hua Gan

Affiliation(s):  . Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   jintao@zju.edu.cn

Key Words:  Heat transfer, Heat exchanger, Oscillating flow, Pressure ratio, Pulse tube refrigerator

Ke Tang, Juan Yu, Tao Jin, Zhi-hua Gan. Influence of compression-expansion effect on oscillating-flow heat transfer in a finned heat exchanger[J]. Journal of Zhejiang University Science A, 2013, 14(6): 427-434.

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author="Ke Tang, Juan Yu, Tao Jin, Zhi-hua Gan",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Influence of compression-expansion effect on oscillating-flow heat transfer in a finned heat exchanger
%A Ke Tang
%A Juan Yu
%A Tao Jin
%A Zhi-hua Gan
%J Journal of Zhejiang University SCIENCE A
%V 14
%N 6
%P 427-434
%@ 1673-565X
%D 2013
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300076

T1 - Influence of compression-expansion effect on oscillating-flow heat transfer in a finned heat exchanger
A1 - Ke Tang
A1 - Juan Yu
A1 - Tao Jin
A1 - Zhi-hua Gan
J0 - Journal of Zhejiang University Science A
VL - 14
IS - 6
SP - 427
EP - 434
%@ 1673-565X
Y1 - 2013
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1300076

Compression and expansion of a working gas due to the pressure oscillation of an oscillating flow can lead to a temperature variation of the working gas, which will affect the heat transfer in the oscillating flow. This study focuses on the impact of the compression-expansion effect, indicated by the pressure ratio, on the heat transfer in a finned heat exchanger under practical operating conditions of the ambient-temperature heat exchangers in Stirling-type pulse tube refrigerators. The experimental results summarized as the Nusselt number are presented for analysis. An increase in the pressure ratio can result in a marked rise in the Nusselt number, which indicates that the compression-expansion effect should be considered in characterizing the heat transfer of the oscillating flow, especially in the cases with a higher Valensi number and a lower maximum Reynolds number.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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