中文摘要：

采用半经验反转理论获得了二甲醚的通用新势能函数,在此基础上,得到了新势能的碰撞积分和特征参数。利用新的势能参数,根据分子动力学理论与WCUB修正,计算了二甲醚在零密度时的气相黏度、导热系数、热扩散系数以及热扩散因子等传递性质,计算的温度范围为273.15—973.15 K。对二甲醚的气相黏度和导热系数的计算值与实验值进行了对比分析,结果表明计算结果具有较高的精度。黏度、导热系数和热扩散系数计算的精度分别在4%,5%和10%以内,可以满足实际工程的需要,为相关领域的科学研究和实际应用提供了基础数据。

英文摘要：

The pair potential ene at zero pressure. At the same rgy functions of dimethyl ether were determined by semiempirical inversion method time, the collision integrals and the characteristic parameters were also given. gaseous viscosity, thermal conductivity, thermal diffusion coefficient and thermal diffusion factor, were calculated using the potential obtained from inversion method within temperature range of 273.15-973.15 K at zero-density. For dimethyl ether, the calculated values of the gaseous viscosity and thermal conductivity and the experimental data were compared. The results show that it has good agreement with the literature values. The calculation accuracy of viscosity, thermal conductivity coefficient, and thermal diffusion coefficient is within 4%, 5% and 10% respectively, which can meet the requirement of the actual practice.