用球共鸣声学法测量了工质丙烷(R290)在温度分别为293.48 K、302.96 K、313.21 K和323.19 K时,压力从200 kPa～700 kPa范围内的四条等温线共28个音速数据.温度、压力和气体音速测量的不确定度分别为±14 mK、2.0kPa和±0.0037%.根据实验数据,由热力学关系式得到了R290在四个温度下的理想气体比热和第二音速维里系数.同时根据现有的高精度实验数据拟合R290的理想气体比热方程.这些研究为R290在工程上的应用提供了必需的热物理性质基础数据.
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