A new method is presented to calculate the friction factor for coiled capillaries, which is that Churchill equation is fitted into the form of Blasius equation and the parameters are applied into the MN type friction factor correlations.

• 提出了利用Churchill方程拟合成Blasius型摩擦系数方程并将其参数应用于MN型螺旋管摩擦系数关系式的新方法,模拟结果与大量的实验数据比较证明效果良好。