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CLC number: O424

On-line Access: 2007-12-14

Received: 2007-06-10

Revision Accepted: 2007-09-05

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.1 P.79~87

http://doi.org/10.1631/jzus.A071340


Impact of load impedance on the performance of a thermoacoustic system employing acoustic pressure amplifier


Author(s):  Ke TANG, Zhong-jie HUANG, Tao JIN, Guo-bang CHEN

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

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

Key Words:  Thermoacoustic engine, Acoustic pressure amplifier (APA), Thermoacoustics


Ke TANG, Zhong-jie HUANG, Tao JIN, Guo-bang CHEN. Impact of load impedance on the performance of a thermoacoustic system employing acoustic pressure amplifier[J]. Journal of Zhejiang University Science A, 2008, 9(1): 79~87.

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author="Ke TANG, Zhong-jie HUANG, Tao JIN, Guo-bang CHEN",
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%DOI 10.1631/jzus.A071340

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T1 - Impact of load impedance on the performance of a thermoacoustic system employing acoustic pressure amplifier
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A1 - Zhong-jie HUANG
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A1 - Guo-bang CHEN
J0 - Journal of Zhejiang University Science A
VL - 9
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EP - 87
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A071340


Abstract: 
An acoustic pressure amplifier (APA) is capable of improving the match between a thermoacoustic engine and a load by elevating pressure ratio and acoustic power output. A standing-wave thermoacoustic engine driving a resistance-and-compliance (RC) load through an APA was simulated with linear thermoacoustics to study the impact of load impedance on the performance of the thermoacoustic system. Based on the simulation results, analysis focuses on the distribution of pressure amplitude and velocity amplitude in APA with an RC load of diverse acoustic resistances and compliance impedances. Variation of operating parameters, including pressure ratio, acoustic power, hot end temperature of stack, etc., versus impedance of the RC load is presented and analyzed according to the abovementioned distribution. A verifying experiment has been performed, which indicates that the simulation can roughly predict the system operation in the fundamental-frequency mode.

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

Reference

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