串级热声系统的工作原理、分析及优化 第一部分 串级热声系统的基本原理  

OPERATING PRINCIPLE,THERMODYNAMIC ANALYSIS AND OPTIMIZATION OF CASCADE THERMOACOUSTIC PRIME MOVERS OR REFRIGERATORS PART I. OPERATING PRINCIPLE OF CASCADE THERMOCACOUSTIC ENGINES

作　　者：罗二仓[1] 戴巍[1] 凌虹[1] 吴张华[1] 黄云[1] 李晓明[2] 

机构地区：[1]中国科学院理化技术研究所,北京100080 [2]浙江大学制冷与低温工程研究所,杭州310027

出　　处：《低温工程》2003年第6期10-16,共7页Cryogenics

基　　金：中国科学院重点方向性项目"新一代高效环保制冷技术的研究与开发"支持

摘　　要：高效的热声转换需要创造高阻抗的行波声场 ,为避免闭合回路产生的直流损失 ,可以利用驻波声场的某些特殊性质。通过对几种驻波声场的分析 ,提出了若干可能结构的串级热声发动机或者串级制冷机的工作流程 ,可在实际中工作获得高的热声转换效率 ,同时具有更简单的结构和更高的可靠性。Efficient thermoacoustic transportation and transformation processes require to create the traveling wave acoustical field with high impedance,so that large viscous loss by flowing can be decreased greatly However,a kind of time averaged mass flowing usually occurs in a looped traveling wave thermoacoustic prime mover or refrigerator,which leads to a great loss due to the convective heat transportation of the flowing Several schematics of possible cascade thermoacoustic engines proposed here might still have high thermodynamic efficiency and will be more reliable and simpler in structure

关 键 词：串级热声系统 驻波声场 行波声场 可靠性 粘性耗散 热声热机 制冷机 

分 类 号：TB651[一般工业技术—制冷工程]