摘要
基于串联型环路三级热声发动机系统,使用SAGE软件从系统与外接负载阻抗匹配的角度进行了模拟计算。分析发现:变温条件下系统内部声场中声功、压力波动和体积流率会分层分布但变化趋势相同,同时阻抗的沿程分布几乎不受影响,结构相同的各级热声发动机可匹配的最佳外接负载阻抗分布区域相近。在此基础上,进一步确定3. 0E7 Pa·s/m^3@60°为各工况下外接负载的优选值。结果表明:当外接负载阻抗都设定为优选阻抗值时,整机系统在变温条件下可同时实现较高的声功输出、热声转换效率和相对卡诺效率。
The tandem structured 3-stage looped thermoacoustic engine system with variable temperature heat sources condition was simulated and analyzed by SAGE software from the point where the system and external loads got into impedance matching. The analysis results find that under the condition of variable temperature heat sources, the acoustic power, oscillating pressure and volume flow rate in the internal acoustic field of the system will distribute in layers, but the variation trend of each own is the same. Meanwhile, the distribution of impedance is almost identical along the whole system, which means that the distribution areas of the optimal external load impedance that can be matched for each thermoacoustic engine is similar. Based on this,in all cases the optimum value of/m^3@60°. The results show that when all the external loads impedance is equal to the optimal value, the whole system can achieve high acoustic power output, thermoacoustic conversion efficiency and relative Carnot efficiency simultaneously.
作者
喻绍飞
罗二仓
张丽敏
吴张华
胡剑英
刘冬冬
罗开琦
孙岩雷
Yu Shaofei;Luo Ercang;Zhang Limin;Wu Zhanghua;Hu Jianying;Liu Dongdong;Luo Kaiqi;Sun Yanlei(Key Laboratory of Cryogenic,Chinese Academy of Sciences,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《低温与超导》
CAS
北大核心
2020年第1期7-11,共5页
Cryogenics and Superconductivity
基金
国家重点研发计划(2016YFB0901403)
北京自然科学基金重点项目(3181002)资助.
关键词
热声发动机
变温热源
负载阻抗
Thermoacoustic engine
Variable temperature heat sources
External load impedance
