摘要
在通用的流体阻力摩擦系数计算公式的基础上进行推演变形,得到两个不同形式的计算表达式。并运用Excel的图表向导功能对这两个表达式进行误差校验。分析数据表明,这两个新的公式被用于计算莫迪图中十条不同相对粗糙度曲线的摩擦系数时,所产生误差的平均水平均能满足工程计算的精度要求。文章立意中的对通用公式进行推演变形的必要性在理论上是成立的。
Two new expressions was got, which were about friction factor of fluid resistance by developing general connection equation. And the formulas were checked by library and chart wizard function of Excel. Data showed that they can be used to calculate friction factors of fluid resistance of ten curves with different relative roughness. Calculation errors were in the range of engineering precision. The need to deduce general formula on subject of this article was established in theory.
出处
《广州化工》
CAS
2009年第4期28-31,共4页
GuangZhou Chemical Industry
关键词
修正指数
误差均方差
摩擦系数
相对误差
amendment index
error variance
friction factor
relative error
