文章摘要
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
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
投稿时间:2017-05-24  
DOI:10.13243/j.cnki.slxb.20170498
中文关键词: 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
英文关键词: pipeline  friction factor  measurement uncertainty  surface roughness parameter  equivalent sand-grain roughness
基金项目:国家重点研发计划项目(2016YFC0401808,2016YFC0400603);国家自然科学基金项目(51609265);中国水科院科研专项(HY0145B152015,HY0145B802017)
作者单位
郭永鑫 中国水利水电科学研究院 流域水循环模拟与调控国家重点试验室, 北京 100038 
杨开林 中国水利水电科学研究院 流域水循环模拟与调控国家重点试验室, 北京 100038 
郭新蕾 中国水利水电科学研究院 流域水循环模拟与调控国家重点试验室, 北京 100038 
李甲振 中国水利水电科学研究院 流域水循环模拟与调控国家重点试验室, 北京 100038 
付辉 中国水利水电科学研究院 流域水循环模拟与调控国家重点试验室, 北京 100038 
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中文摘要:
      管道水力摩阻系数的精确取值是输水工程水力设计的重要前提,当量粗糙度k是计算水力摩阻系数的基础参数,然而传统的水力学试验方法检测k值需耗费较多的人、财、物、时。研究首先对3种不同粗糙度内衬的球墨铸铁管进行水力学性能的试验检测,基于不确定度理论给出合理的k值。在此基础上,采用触针式表面粗糙度仪对管道内壁的表面粗糙度参数进行检测,将检测结果与k值进行比较,结合国外已有试验数据,分析给出工程中管道k值的快速评测方法:当粗糙度轮廓的算术平均偏差Ra ≤ 10 μm或粗糙度轮廓的最大高度Rz ≤ 50 μm时,取样长度为lr=2.5 mm,采用中线制评定所得的Rzk,可使用Rz值代表k值对管道的水力性能进行评价。研究成果也可用于生产中管道内涂层加工质量的控制和提高。
英文摘要:
      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 ≤ 10μm or the maximum height of roughness profile Rz ≤ 50μm, the sampling length of roughness profile lr set to 2.5mm, then Rzk. 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.
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