| 热声换热器的工作机制及换热特性研究 |
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| 引用本文： | 高波,罗二仓,陈燕燕,戴巍.热声换热器的工作机制及换热特性研究[J].工程热物理学报,2010(2). |
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| 作者姓名： | 高波 罗二仓 陈燕燕 戴巍 |
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| 作者单位： | 中国科学院理化技术研究所低温工程学重点实验室;中国科学院研究生院; |
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| 基金项目： | 杰出青年基金项目资助(No.50625620) |
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| 摘 要： | 基于弱非线性热声理论,对热声换热器的换热特性进行了理论研究.获得了平行平板通道内二阶周期平均热流的解析解,并指出存在临界声导率比的模|Ya|_(cr)~I,使得二阶周期平均热流为零.当实际声导率比的模大于|Ya|_(cr)~I时,振荡流体从外热源吸热,为吸热器;当实际声导率比的模小于|Ya|_(cr)~I时,振荡流体向外放热,为放热器.获得了平行平板通道内二阶周期平均温度的解析解.计算分析了工作流体的物性参数、流动参数以及声导率比对二阶周期平均温度分布的影响,为进一步考察换热系数提供了依据。
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| 关 键 词： | 可压缩振荡流动 热声换热器 周期平均换热 平行平板通道 二阶周期平均热流 二阶周期平均温度 |
THE WORK MECHANISM AND HEAT TRANSFER CHARACTERISTIC IN THERMOACOUSTIC HEAT EXCHANGER |
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| GAO Bo LUO Er-Cang CHEN Yan-Yan DAI Wei.THE WORK MECHANISM AND HEAT TRANSFER CHARACTERISTIC IN THERMOACOUSTIC HEAT EXCHANGER[J].Journal of Engineering Thermophysics,2010(2). |
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| Authors: | GAO Bo LUO Er-Cang CHEN Yan-Yan DAI Wei |
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| Institution: | 1;2;1;2;1.The Key Laboratory for Cryogenic Technology Technical Institute of Physics and Chemistry;CAS;Beijing 100190;China;2.Graduate School of Chinese Academy of Sciences;Beijing 100049;China |
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| Abstract: | In terms of the understanding on nonlinear physical essence of the non-zero time-averaged energy conversion,a locally-analytical heat transfer models for parallel-plate flowing passages subjected to oscillating flow were developed.The analytical expressions show that the time-averaged heat flux is a complex function of thermal properties,dynamic Reynolds number and acoustical admittance and there exists a critical acoustical admittance |Y_a|_(cr)~I making the heat flux being zero. Thermoacoustic heat exchan... |
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| Keywords: | compressible oscillating flow thermoacoustic heat exchanger time-averaged heat exchange parallel-plate flowing passages time-averaged heat flux time-averaged transversal temperature |
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