气液两相流体粘滞系数的计算

采用统计力学模型对气液两相流体的粘滞系数进行了研究。认为这种模型比一般的液体理论方法直观和简洁,能更好地分析和计算两相流的粘度与其温度、流压及含气率的关系。研究中发现气液两相流体的粘度不仅与温度和含气量有关,而且还受到压强的影响,即随着含气率的增加,压强对粘度的影响越来越显著。对含气水溶液进行的计算表明,粘度随溶液含气量的增多而下降,随溶液流压的升高而增大。将计算结果与重水及稀溶液的实验值进行了比较,结果表明,理论计算结果的误差不超过10％。

A Calculation on Viscosity Coefficient of Two-phase Solution Containing Gas and Liquid

The paper calculates the viscosity coefficient of two-phase solution that contains gas and liquid with the statistical mechanics and dynamics method. It is considered that the method is more intutive and simple than common liquid theoretical method to analyze and accurately calculate the viscosity of two-phase flow versus its temperature,flowing pressure and void fraction. It is found that the viscosity is related to temperature void fraction and pressure,that is,the pressure will strongly affect viscosity as void fraction increases. The coefficients of water and dilute solution containing gas are calculated,and it shows that the viscosity declines as dillute solution increases;if the flowing pressure raises,the viscosity also raises. The calculated results are compared with the experimental results of heavy water and dilute solution. The results show that the error of theoretical results is less than 10 %.