摘要
在大量收集与分析国内外PCCP管道摩阻损失计算方法的基础上,论述了3个常用摩阻损失计算公式的起源;分析了各公式的适用条件。并以南水北调中线PCCP管道摩阻损失计算为例,给出了采用Hazen-Williams公式和Manning公式计算的误差;解释了误差产生的原因;推荐了计算大口径管道摩阻损失的公式。最后建议南水北调工程4m直径PCCP管道制造出来后应立即进行水力学试验确定其绝对粗糙度值。
Based on field investigation and literature review, the calculation methods of friction loss for the PCCP pipe around the world were collected and analyzed. The three formulas typically used to calculate friction loss were presented and compared. An appropriate formula used to calculate friction loss for the big diameter PCCP pipe was recommended. Finally, the hydraulic test was suggested to acquire the relative roughness of the PCCP pipe.
出处
《南水北调与水利科技》
CAS
CSCD
2008年第1期231-234,共4页
South-to-North Water Transfers and Water Science & Technology
基金
南水北调中线京石段应急供水工程项目(编号9423)
关键词
南水北调
PCCP
摩阻损失
South-to-North Water Transfer
PCCP
friction loss
