水利学报2018，Vol.49Issue(2)：178-185,8.DOI:10.13243/j.cnki.slxb.20170498
基于表面粗糙度参数的管道当量粗糙度快速评测
Quick evaluation of the pipeline equivalent sand-grain roughness based on the surface roughness parameters
摘要
Abstract
The accurate friction factor of pipeline is an important prerequisite during the hydraulic design process of water conveyance project.The equivalent sand-grain roughness is a key parameter to calculate the pipeline friction factor.However,it takes lots of manpower,material,financial resources and time to measure the equivalent sand-grain roughness by the traditional hydraulic test method.In this study,the hydraulic performances of 3 kinds of ductile iron pipes with different coatings were tested,and the equivalent sand-grain roughness values were obtained based on the measure uncertainty analysis,respectively.Then,the inner wall surface roughness parameters of 3 kinds of pipes were detected by the E-35B portable surface roughness tester profilometer.By the comparison of the surface roughness parameters and the equivalent sand-grain roughness k,and the reanalysis of others researcher's data,a quick evaluation method of pipe equivalent sand-grain roughness based on the surface roughness parameters was given:when the arithmetical mean deviation of roughness profile Ra≤ l0μm or the maximum height of roughness profile Rz≤50μm,the sampling length of roughness profile lr set to 2.5mm,then Rz-≈k.So,the equivalent sand-grain roughness k in the Colebrook-White formula was replaced with Rz,and the friction factor can be calculated.The research results can also be used to control and improve the coating quality of pipeline.关键词
管道/水力摩阻系数/测量不确定度/表面粗糙度参数/当量粗糙度Key words
pipeline/friction factor/measurement uncertainty/surface roughness parameter/equivalent sand-grain roughness分类
建筑与水利引用本文复制引用
郭永鑫,杨开林,郭新蕾,李甲振,付辉..基于表面粗糙度参数的管道当量粗糙度快速评测[J].水利学报,2018,49(2):178-185,8.基金项目
国家重点研发计划项目(2016YFC0401808,2016YFC0400603) （2016YFC0401808,2016YFC0400603）
国家自然科学基金项目(51609265) （51609265）
中国水科院科研专项(HY0145B152015,HY0145B802017) （HY0145B152015,HY0145B802017）
