长输管道瞬变流摩阻的实用计算法

针对传统瞬变流摩阻计算精度低的问题,对其算法进行了改进。提出采用动态摩阻系(因)数来计算瞬态摩阻,并运用辛普生方法处理摩阻积分项,提高了计算精度。算例表明,将该方法应用于长距离管道水击分析,可以在保证与传统方法相同计算精度的前提下,能够显著地减小计算量,节省计算时间。

Practical Calculation Method for Friction Loss Transient Flow in Long Distance Pipelines

The traditional algorithms for friction loss in transient flow are improved to solve their low computational precision.It is put forward that dynamic friction coefficient (or factor) is used to calculate transient friction and integral item of friction loss is treated by Simpson method,which can improve calculating precision.The computational sample is shown that,on the premise of the same precision with traditional algorithms,the method proposed by the paper can reduce computational load remarkably and save calculation time in the application of water hammer analysis in long distance pipelines.