基于Lattice-Boltzmann方法的混合制冷剂粘度计算

Calculation of the Viscosity of Mixed Refrigerant Based on Lattice-Boltzmann Method

以R32与R125为对比制冷剂工质,用基于Lattice-Boltzmann方法的新算法计算了混合制冷剂R410A与R407C的动力粘度.分析了误差,探讨了提高计算精度的方法,提出要选用合适的对比工质,考虑不同组分之间受力等措施来提高精度.结果表明:在选用合适的对比工质后,R410A的平均计算误差5.2%,最大误差7.0%;R407C的平均计算误差5.5%,最大误差8.0%.计算结果说明该方法可以对混合制冷剂动力粘度进行有效计算.

Using a new algorithm based on Lattice-Boltzmann method, the kinetic viscosities of two mixed refrigerants, R410A and R407C, were calculated with pure refrigerants R32 and R125 as contrastive working fluid. The deviation was analyzed and the methods of improving the calculation precision were discussed. One way is to choose the appropriate contrastive refrigerants, and the other is to calculate the force between different refrigerant components. The calculation results show that the average and maximal deviation of viscosity of R410A are 5.2% and 7.0%, respectively while the average and maximal deviation of viscosity of R407C are 5.5% and 8.0 %, respectively. The results show that this method is effective on the calculation of kinetic viscosity of mixed refrigerant.