热声谐振管材质的优选设计  

Optimal design of the materials for thermoacoustic resonators

作　　者：郭方中[1] 赵玲[1] 胡兴华[1] 张春萍[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2006年第5期108-110,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50276064);教育部博士学科点专项基金资助项目(20030487046)

摘　　要：从热动力学角度分析了弛豫过程的特征,指出其在不同的热声部件中产生的不同效应.针对热声谐振管,建立了描述弛豫过程的工程化模型,避免了求解气固耦合系统斯托克斯方程组的困难.该模型求得了固体热边界层内的温差分布,得出了与Swift分析等价的优选指标.计算结果表明:采用氦气作气体工质、用聚酯作谐振管时,壁面与气体微团的温差比较大,弛豫引起的耗散较小.因此在做热声谐振管的优化设计时,一定要考虑管材与气体的匹配关系,尽量减小谐振管内的耗散损失.According to thermodynamics, the characteristics of the relaxation process in thermoacoustic systems and the resulting effect were discussed. For the thermoacoustic resonator, an engineering model of relaxation process was built to get the temperature development in the thermo-boundary layer of solid, which could avoid the difficulty coming from solving equations of the gas-solid coupling system and acquire the same optimal parameter as that of Swift＇s. The computing results showed that when the gas is helium and the resonator is made of polyester, the temperature difference between the wall of the resonator and the gas parcel is bigger and the relaxation dissipation is smaller. When the thermoacoustic resonators are optimally designed to reduce the dissipation loss in the resonators, the matching of the materials for the resonators and the gas should be considered carefully.

关 键 词：热声系统 谐振管 弛豫 优化设计 

分 类 号：TB651[一般工业技术—制冷工程] O426.6[理学—声学]