| Application of Method-of-Lines to Charging-Up Process in Pipelines with Entrapped Air |
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| 作者姓名： | 张永良 K. Vairavamoorthy |
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| 作者单位： | State Key Laboratory of Hydroscience and Hydraulic Engineering Department of Hydraulic Engineering Tsinghua University Beijing 100084，China，Department of Civil and Building Engineering Loughborough University Leicestershire LE11 3TU，UK |
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| 基金项目： | SupportedbyProgramforNewCenturyExcellentTalentsinUni-versity(No.NCET-04-0093)andtheNationalNaturalScienceFoundationofChina(No.50539070) |
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| 摘 要： | Introduction The initial charging-up process is an important opera-tion in an intermittent,undulating pipeline system.Re-cently,the charging-up process has received attention with the aim of predicting the effective duration of supply in different regions…
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| 关 键 词： | 瞬变流动 上装料过程 管道 暗泡 直线法 |
| 收稿时间： | 2005-01-12 |
| 修稿时间： | 2005-01-122005-06-15 |
Application of Method-of-Lines to Charging-Up Process in Pipelines with Entrapped Air |
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| ZHANG Yongliang,K. Vairavamoorthy.Application of Method-of-Lines to Charging-Up Process in Pipelines with Entrapped Air[J].Tsinghua Science and Technology,2006,11(3):324-331. |
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| Authors: | ZHANG Yongliang K Vairavamoorthy |
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| Institution: | 1.State Key Laboratory of Hydroscience and Hydraulic Engineering,Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China;2.Department of Civil and Building Engineering, Loughborough University, Leicestershire LE11 3TU, UK |
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| Abstract: | A mathematical model is presented for the charging-up process in an air-entrapped pipeline with moving boundary conditions. A coordinate transformation technique is employed to reduce fluid motion in time-dependent domains to ones in time-independent domains. The nonlinear hyperbolic partial differential equations governing the unsteady motion of fluid combined with an equation for transient shear stress be-tween the pipe wall and the flowing fluid are solved by the method of lines. Results show that ignoring elas-tic effects overestimates the maximum pressure and underestimates the maximum front velocity of filling fluid. The peak pressure of the entrapped air is sensitive to the length of the initial entrapped air pocket. |
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| Keywords: | transient flow charging-up process pipelines entrapped air method of lines |
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