Lumped parameter model for resonant frequency estimation of a thermoacoustic engine with gas-liquid coupling oscillation

被引:6
|
作者
Tang, Ke [1 ]
Lei, Tian [1 ]
Lin, Xiao-gang [1 ]
Jin, Tao [1 ]
Zhang, Yu [1 ]
机构
[1] Zhejiang Univ, Inst Refrigerat & Cryogen, Hangzhou 310027, Zhejiang, Peoples R China
来源
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A | 2011年 / 12卷 / 03期
基金
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词
Thermoacoustic engine; Gas-liquid coupling oscillation; Acoustic-electric analogy; Resonant frequency; PERFORMANCE; CRYOCOOLER; GENERATOR; AMPLIFIER;
D O I
10.1631/jzus.A1000191
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Gas-liquid coupling oscillation is a novel approach to reducing the resonant frequency and to elevating the pressure amplitude of a thermoacoustic engine. If a thermoacoustic engine is used to drive low-frequency pulse tube refrigerators, the frequency matching between the thermoacoustic engine and the refrigerator plays an important role. Based on an acoustic-electric analogy, a lumped parameter model is proposed to estimate the resonant frequency of a standing-wave thermoacoustic engine with gas-liquid coupling oscillation. Furthermore, a simplified lumped parameter model is also developed to reduce the computation complexity. The resonant frequency dependence on the mean pressure, the gas space volume, and the water column length is computed and analyzed. The impact of different working gases on the resonant frequency is also discussed. The effectiveness of the models is validated by comparing the computed results with the experimental data of the gas-liquid coupling oscillation system. An increase in the mean working pressure can lead to a rise in the resonant frequency, and a lower resonant frequency can be achieved by elongating the liquid column. In comparison with nitrogen and argon, carbon dioxide can realize a lower frequency due to a smaller specific heat ratio.
引用
收藏
页码:232 / 237
页数:6
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