摘要
搭建了一台高频斯特林热声发动机,分别采用N2、He、Ar和CO2作为工作介质,测量该系统在不同充气压力下的压力振幅和起振温度的变化,并引用了无量纲参数—操作因子和相对水力半径对实验数据进行分析。分析表明,当充气压力不高于1.95 MPa时,CO2的起振温度最低,且在相同的充气压力下He、Ar、N2和CO2的起振温度依次降低;当充气压力高于1.95 MPa时,He的起振温度最低。各种工质的起振温度在相近的相对水力半径下达到最小值,并且其压力振幅均随操作因子和充气压力的增大而增大。
A high-frequency thermoacoustic Stirling engine was set up,using N2,He,Ar and CO2 as the working medium respectively to measure the onset temperature of the system under different gas pressure.At the same time,two dimensionless parameters-operating factor and relative penetration thickness which have an effect on the pressure amplitude and onset temperature were cited.Data analysis shows that CO2 has the lowest onset temperature when the gas pressure is not higher than 1.95 MPa and the onset temperature of He,Ar,N2and CO2decreases gradually at the same gas pressure,however,the onset temperature of He is minimum when the gas pressure is higher than 1.95 MPa.Under similar relative penetration thickness,the onset temperatures of various working fluids are lowest and the pressure amplitude will be enhanced with the increase of operating factors and inflation pressure.
出处
《低温工程》
CAS
CSCD
北大核心
2011年第5期1-5,36,共6页
Cryogenics
基金
国家教育部高等学校博士学科点专项科研基金资助课题(20101101120009)
国家自然科学基金资助项目(51006009
10904154)
北京市自然科学基金资助项目(3112021)
关键词
起振温度
压力振幅
操作因子
相对水力半径
onset temperature
pressure amplitude
operating factors
relative penetration thickness
