液体管道瞬变流摩阻的计算方法

在液体管道瞬变流计算中,传统的拟恒定摩阻模型不能准确描述瞬变流的真实物理现象.阐述了瞬变流非恒定摩阻问题的主要研究成果,着重讨论了当今为改进瞬变流摩阻计算而提出的非恒定摩阻模型的研究进展,期望利用非恒定摩阻模型结合经典的特征线法理论使液体管道的水击计算更接近实际.介绍了几类有重要价值的非恒定摩阻模型及相应的应用范围,并给出了各类模型进行数值计算的思路及以后的主要研究方向.

The Methods of the Computation of Friction Losses in Transient Pipe Flow

The traditional quasi-steady friction models are proved to be inaccurate in transient pipe flow because they underestimate friction losses in transients. In the past few years, some unsteady friction models have been developed so as to depict waterhammer produced in pipelines more accurately. In this paper,the traditional methods of the computation of friction losses in transients and the main achievements in this field are summarized. On the basis of them,a new idea is suggested to extend the application of the more accurate unsteady friction models to other pipelines such as crude oil and products pipelines.