特征线法分析考虑局部水头损失的三通管道的水击过程  

Analysis of Water Hammer Process of Tee Pipe Considering Local Head Loss by Using Characteristic Line Method

作　　者：陈江林[1] 吕宏兴[1] 石喜[1] 朱德兰[1] 王文娥[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《节水灌溉》2011年第10期17-20,共4页Water Saving Irrigation

基　　金：国家"863"计划项目(2010AA10A302);国家自然科学基金资助项目(50909083)

摘　　要：基于特征线法建立了求解三通管道水击过程的数学模型,模型考虑了局部水头损失的影响,编制了三通管道水击过程的计算程序。在数值处理上,Darcy-Weisbach摩擦力项用二阶精度格式来近似,保证了流体在流动水击过程分析时的计算稳定性和精确度。应用该程序,分析模拟了各种阀门组合情况下的管网水击实例,对比了考虑局部水头损失和不考虑局部水头损失对求解结果的影响。In this paper,the characteristic line method was put forward to solve mathematical model for water hammer in tee pipeline,in which the influence of local head loss was considered.The calculation program for water hammer in tee pipe was also developed.In this model,the Darcy-Weisbach friction is simulated with second-order accuracy of approximate format to ensure the calculation stability and precision.The program is used to analyze pipenet water hammer under different valve combination condition and the results of the two models,in which the local head loss was considered or not,was compared to analyze the influence of local head loss.

关 键 词：局部水头损失 水击压强 特征线法 二阶线性隐式格式 

分 类 号：S274.4[农业科学—农业水土工程]