pipe friction coefficient meaning in Chinese

钻杆摩擦系数

The results show that the heat transfer in intake manifold and cylinder has obvious effects on the volume efficiency , while the pipe friction coefficients and bent pressure loss coefficients have less effect
结果表明，进气管和气缸的传热对充气效率的影响较显著，而管道摩擦系数和弯管压力损失系数对充气效率的影响较小。
In order to improve the prediction accuracy , the sensitivities of pipe friction coefficients , pressure loss coefficients in bents , wall temperatures and heat transfer coefficients in pipes and cylinders on the volume efficiency are investigated
为提高充气效率的计算精度，由模拟计算和相关试验，分析了管道的摩擦系数、弯管的压力损失系数、进气管壁和气缸壁温度及其传热系数对充气效率的影响程度。