耦合管道系统在热声发动机中的传输特性

doi:10.3785/j.issn.1008-973X.2009.

2009, Vol. 43

Issue (8): 1463-1468 DOI: 10.3785/j.issn.1008-973X.2009.

动力与电气工程

耦合管道系统在热声发动机中的传输特性

白昆,邱利民,王波,孙大明,巢伟

(浙江大学制冷与低温研究所, 浙江杭州 310027)

Transmission characteristics of coupled pipe system in thermoacoustic engine

BAI Hun, QIU Li-Min, WANG Bei, SUN Da-ming, CHAO Wei

Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China

全文: PDF(647 KB)

摘要：

为了优化热声发动机和脉管制冷机之间的匹配,在流体网络模型的基础上,结合线性热声理论,推导了三管道耦合系统的传输方程,利用DeltaE对耦合系统在不同直径和长度下的压比放大特性和入口所需声功进行了理论计算和对比.各管道采用合适的直径,在行波热声发动机上对管道耦合系统的压比放大特性进行了实验验证.采用RC负载法测量耦合系统末端的声功,研究了在末端不同阻抗下耦合系统的声功输出特性.理论预测和实验结果趋势一致.实验中采用高纯N2作为工质,当工作压力为2.20MPa时,在耦合系统末端获得了1.50的压比;在一定的输出阻抗下获得了105W的输出声功.

关键词： 热声发动机; 亥姆霍兹共鸣器; 声压放大器; 传输特性; 流体网络模型

Abstract:

For optimizing the match between thermoacoustic engine and pulse tube refrigerator, the transmission equation of a coupled three-pipe system was derived based on the fluid network model and the linear thermoacoustic theory. The amplification characteristics of pressure ratio and the acoustic power needed at the inlet of the coupled pipe system with different pipe diameter and length were calculated and compared based on DeltaE. With suitable pipe diameter, experiments were done on a travelling-wave thermoacoustic engine to verify the amplification characteristics of pressure ratio of the coupled pipe system. RC load method was used to measure the acoustic power at the end of the coupled system, and the characteristics of the output acoustic power changing with the impedance at the end of the coupled system were studied. Tendency agreement between the calculation prediction and experimental results was obtained. Using nitrogen as working fluid at 2-20 MPa, the pressure ratio of 1-50 was obtained at the end of the coupled system, and the maximum output acoustic power obtained under certain resistance was 105 W.

Key words: thermoacoustic engine Helmholtz resonator acoustic amplifier transmission characteristics fluid network model

出版日期: 2009-09-01

TK 1

基金资助:

国家自然科学基金资助项目（E50536040）|教育部博士点基金资助项目（20060335120）|中国博士后科学基金资助项目（20060390332）

通讯作者: 邱利民，男，教授. E-mail: Limin.qiu@zju.edu.cn

作者简介: 白昆（1982-），男，湖南常德人，硕士生，从事热声发动机研究.

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引用本文:

白昆,邱利民,王波,等. 耦合管道系统在热声发动机中的传输特性[J]. J4, 2009, 43(8): 1463-1468.

BAI Hun, QIU Li-Min, WANG Bei, et al. Transmission characteristics of coupled pipe system in thermoacoustic engine. J4, 2009, 43(8): 1463-1468.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2009. 或 http://www.zjujournals.com/xueshu/eng/CN/Y2009/V43/I8/1463

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