采用正弦型谐振管的高频驻波热声发动机  

High frequency standing-wave thermoacoustic engine with sinusoidal resonance tube

作　　者：于波[1,2] 戴巍[1] 罗二仓[1] 余国瑶[1] 张晓东[1,2] 

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《低温工程》2009年第1期1-4,共4页Cryogenics

基　　金：国家自然科学基金(10574135,50625620);中国科学院方向性项目(KJCX2-YW-W02)支持

摘　　要：设计了一截面积正弦变化的对称管道作为高频驻波发动机谐振管,实验研究了该发动机的工作性能与声功输出能力,并与采用等直径谐振管的实验结果进行对比。在一定加热功率下,正弦管能有效抑制系统产生的二阶谐波,提高一阶压力波动幅值并降低加热块温度。由于存在显著的非线性效应,基于经典线性热声理论的计算无法预测两种谐振管实验性能的不同,并且与实验结果偏差很大。A symmetrical pipe whose cross-sectional area changes sinusoidally was designed as the syntonic pipe of the high frequency standingl-wave thermoacoustic engine. The performance and output characteristics of the engine with such resonance tube were investigated experimentally and compared with the engine with constant-diameter resonance tube. The experiment result showed that sinusoidal tube can effectively inhibit second order harmonic mode, increase first order pressure amplitude and lower down heating block temperature. Due to obvious nonlinear effect, the calculation based on linear thermoacoustic theory cannot forecast the difference between these two kinds of resonance tubes and has a large deviation from the experiment results.

关 键 词：正弦型谐振管二阶谐波线性热声理论 

分 类 号：TB651[一般工业技术—制冷工程] TB61