沿程水头损失

分析提出了薄塑软管断面呈全圆形时，管首工作压力一定和变动下的沿程水头损失及沿程阻力系数的经验公式。

It is suggested through analysis that when the cross section of plastic hose appears to be circular in shape , empirical equations of frictional head loss and frictional resistant coefficient are established .

输配水管道沿程水头损失计算方法探讨

Discussion on the calculation method of the frictional head loss in the water transportation and distribution pipe

采用神经网络（ANN）方法对沿程水头损失系数的影响因素进行了分析。

Influential factors of friction factor of head loss are analyzed by adopting artificial neural network ( ANN ) .

大口径PCCP管道沿程水头损失计算探讨

Discussion on friction head loss calculation for large diameter PCCP

计算实例表明，采用ANN方法计算沿程水头损失系数简单方便，计算精度高，工作量小，可操作性强，通用性好，工程适用性强。

An example shows that it is convenient and accurate to calculate the friction factor with the ANN model and it can be used in engineering practice .

模型计算结果与试验数据以及经验公式的计算成果比较表明，利用ANN模型进行沿程水头损失系数影响因素评估有效和方便。

The calculation result that is compared with test data and empirical formula result , shows that it is convenient and effective to adopt ANN model to analyze the influential factors of friction factor of head loss .

改性聚乙烯软管沿程水头损失的试验研究

Experiments of Frictional Head Loss for Polyvinyl Plastic Hose Changed in Nature

沿程水头损失系数研究的一种新方法

A new method for studying friction factor of head loss

管道沿程水头损失的试验研究

Test and research for the loss head along pipeline

微管沿程水头损失计算方法试验研究

The Study on the Head Loss Calculation of Micro-tube

考虑水温变化的微灌塑料管沿程水头损失计算公式探讨

A New Equation for Friction Loss along the Plastics Pipe of Micro-Irrigation with Variation in Water Temperature

考虑水温变化的热水管路水头损失计算公式镀锌钢管沿程水头损失计算的试验研究

A New Equation for Friction Loss along the Hot Water Pipe with Variation in Water Temperature Experimental research on hydraulic calculation of galvanized steel pipeline

根据已有的塑料管沿程水头损失计算公式，采用多元线性回归计算方法，提出了微灌塑料管沿程水头损失计算公式。

The equation for friction loss along the plastic pipe of micro irrigation is presented adopting the multiple regression analysis according to existing friction loss equation .

针对目前多孔管沿程水头损失计算方法存在的问题，推导出了一个新的多孔管沿程水头损失近似计算公式。

In this paper , a new approximate equation for friction loss along the pipelines with multiple outlet is presented , which is superior to the existing friction loss equations .

输配水管道是城市供水系统的重要组成部分，管道沿程水头损失计算又是输配水管道设计的核心。

It is to design the Water Supply system of C city in the east of Guangdong Province , which includes : collection works , purification works , transmission and distribution works .

按照经典的水力学计算公式和经验公式对其沿程水头损失进行计算，结果与实际情况不符，并存在较大的偏差，因此现行的沿程水头损失公式不适宜于微小管道。

As we calculate the head loss by the empirical formula , we find the result has biggish error with the fact , so we think those formula don 't adapt to the study and application of micro-tube hydraulic .

沿程水头损失计算应当考虑到我国近年来管道制造水平提高、糙率显著下降的实际情况，并从实践中总结经验，注意合理取值。

The computation of the processing head loss should consider the national actual situation that the pipe manufacturing level has been improved and the rough rate has been reduced obviously in recent years , and sum up the experiences from the practice and pay attention to the rational sampling .