作　　者： ; ; ; ;

机构地区： 华南理工大学理学院

出　　处： 《陕西科技大学学报（自然科学版）》 2005年第5期24-28,共5页

摘　　要： 为了研究超临界CO2流体中超声声速特性,设计了可用于超临界CO2流体的声速测量装置,采用频率2.5MHz单探头的脉冲回波法测量了温度为25～55℃,压力为10～26MPa的CO2流体声速.结果表明:超临界CO2流体声速随压力的增加而增大,随温度的升高而降低,超临界CO2流体声速是压力和温度的函数. The experimental apparatus has been constructed for measuring the speed of sound in supercritical fluids. The technique is based on a pulse-echo method with a single transducer operating at 2. 5MHz, the measurements of ultrasonic velocity in Fluid CO2 were performed at the pressure from 10MPa to 26MPa and in the temperature range from 25℃ to 55℃, the results showed that the speed of sound in Supercritical Fluid CO2 increased along with the increase of pressure, and decreased along with the increase of temperature. The speed of sound in Supercritical Fluid CO2 is a function of pressure and temperature.

关 键 词： 超临界 流体 声速 压力 温度

领　　域： [理学] [理学] [一般工业技术]