对增阻系数法计算浆体管道阻力的研究

A Study on Calculating the Resistance of Slurry Pipeline by Increasing Resistance Coefficient Method

本文根据扩散理论相对体积浓度C/C_(A)的H.M.伊斯梅尔方程与E.J.瓦斯普和王绍周浆体流态判别标准,采用刘德忠对指数Z计算法进行浆体流态判别计算,得出似均质浆体体积浓度C_(1V)和非均质浆体体积浓度C_(2V),依据浆体相对体积浓度C/C_(A)=C_(1V)/C_(V),提出C_(1V)粗细颗粒分界粒径概念,并在此基础上,提出C_(2V)非均质浆体体积浓度增阻概念,对分界粒径概念和增阻概念进行定义,推导出增阻系数法计算浆体管道阻力公式,该公式通过我国六条长距离浆体管道工程验证,计算结果与工程实际相近。

This article is based on the diffusion theory of relative volume concentration H M.The Ismail equation is combined with the flow state discrimination criteria of E.J.Vasp and Wang Shaozhou slurries,and Liu Dezhong s exponential calculation method is used to determine the flow state discrimination calculation of slurries.The volume concentration of quasi homogeneous slurries and heterogeneous slurries are obtained,and based on the relative volume concentration of slurries,the concept of coarse and fine particle boundary particle size is proposed.On this basis,the concept of heterogeneous slurry volume concentration increasing resistance is proposed,and the concepts of boundary particle size and increasing resistance are defined,Derive the formula for calculating the resistance of slurry pipelines using the drag coefficient method,which has been verified by six long-distance slurry pipeline projects in China.The calculation results are similar to the actual engineering situation.