| 江汉大学机电与建筑学院，湖北 武汉 430056
关键词： 摩擦因数；光滑管；湍动流体；计算方法
提出了一个简单适用的显式方程，可用于流体处在直圆形湍流光滑管区时的摩擦因数的计算。在3 000≤Re≤108时，该方程的计算结果与卡门-普朗特方程的平均偏差为0.503%，最大偏差不超过0.87%，其计算精度高于其他现有的经验公式。
Calculation of the Friction Factor for the Turbulent Flow in Straight and Circular Pipes
FANG Qing-hua
（School of Electromechanical & Architectural Engineering，Jianghan University，Wuhan，430056，China）
Abstract：A new simple and explicit equation is proposed for calculating the friction factor for turbulent flow in straight and circular pipes.The results of this new equation can give the average deviation（ARD）of 0503% and the maximum deviation of 087% as against that of the KarmanPrandtl equation，in the range of Reynolds number being 3 000≤Re≤10.8. The calculating accuracy of the new equation is higher than others.
Key words：friction factor；smooth pipe；turbulent flow；calculating method
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