R-K气体绝热指数与声速关系的分析

Analysis of the Relationship between the Adiabatic Exponent of R-K Gas and the Velocity of Sound

工程技术上测定气体的声速能达到很高的精度,为此运用热力学性质分析和导出R-K气体的绝热指数与声速的表达式。在压强分别为p=0.1013 MPa和p=1 MPa下对空气温度从100~1000 K的区间范围内计算R-K气体的绝热指数的数值,与空气绝热指数的实测数据相比R-K气体空气绝热指数的数值平均误差仅为0.065%和0.32%,明显优于理想气体空气绝热指数的数值,与实测值有很好的契合。

Determination of sound velocity gas engineering technology can achieve high precision,the adiabatic index of RK gas and sonic expression was analyzed and exported using the thermodynamic properties. Under the pressures of 0. 1013 MPa and 1 MPa,gas adiabatic index of RK was calculated in air temperature range from 100 K to1000 K,compared with the measured data of RK gas air adiabatic index,the average error was only 0. 065 % and0. 32 %,were significantly better than the value of the ideal gas adiabatic index of air,were good fit with the measured values.