摩擦阻力系数简化公式探讨

An Inquiry Study on Simplified Formula of Frictional Resistancc Go- efficient

本文提出了一个适用于光滑风道至中等光滑风道摩擦阻力系数简化公式。由于该式可用单元流量表示,故有形式简单、使用方便的特点,从而易对渐扩管道摩擦阻力损失实现积分计算;对于中等粗糙风道及粗糙风道,本文采取了通过粗糙度系数修正的办法,同样可以获得精确的计算结果。

The article sets up a formula for the calculation of frictional resistancecoefficient for smooth blowing passages and medium smooth ones. The formulais characterized with its simple expression due to the unit flow indication. Theformula could also be used for rough and medium rough blowing passages asroughness coefficients are adopted.