| 河网模拟JPWSPC方法和分级解法的对比 |
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| 引用本文： | 朱德军,陈永灿,刘昭伟,王智勇. 河网模拟JPWSPC方法和分级解法的对比[J]. 长江科学院院报, 2010, 27(10): 39-43. DOI: 10.3969/j.issn.1001-5485.2010.10.009 |
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| 作者姓名： | 朱德军 陈永灿 刘昭伟 王智勇 |
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| 作者单位： | 清华大学 水利水电工程系， 北京 100084 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项，国家自然科学基金资助项目 |
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| 摘 要： | 比较了汊点水位预测-校正法（junction-point water stage prediction and correction, JPWSPC）和经典的分级解法，在处理缓流河网汊点处回流效应时的不同，并对比了它们的计算效率。应用这2类方法时，Saint-Venant方程组都采用Preissmann格式离散，生成的非线性离散方程用Newton-Raphson方法求解。比较表明：这2类方法都能处理普适河网，JPWSPC法无需求解整体连接矩阵，同时不会增加每一时间步的迭代次数，因而节约了系统内存，提高了计算效率；河网中河段数目越多，JPWSPC法的效率优势越明显。
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| 关 键 词： | 河网水动力数值模拟 汊点水位预测-校正法（JPWSPC） 分级解法 效率 |
Comparison of JPWSPC Method and Three-phase Algorithms for Hydrodynamic Simulation in General Open-channel Networks |
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| ZHU De-jun,CHEN Yong-can,LIU Zhao-wei,WANG Zhi-yong. Comparison of JPWSPC Method and Three-phase Algorithms for Hydrodynamic Simulation in General Open-channel Networks[J]. Journal of Yangtze River Scientific Research Institute, 2010, 27(10): 39-43. DOI: 10.3969/j.issn.1001-5485.2010.10.009 |
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| Authors: | ZHU De-jun CHEN Yong-can LIU Zhao-wei WANG Zhi-yong |
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| Affiliation: | Department of Hydraulic Engineering, Tsinghua University， Beijing 100084，China |
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| Abstract: | This paper compares a newly proposed method,namely the junction-point water stage prediction and correction(JPWSPC) method,for gradually varied subcritical flow simulation in general open-channel networks with conventional three-phase algorithms.Emphasis is on their difference in backwater effect treatment and efficiency.When the two classes of algorithms are implemented,the Saint-Venant equations are discretized using the Preissmann scheme and the resulting nonlinear equation system is solved using the New... |
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| Keywords: | hydrodynamic simulation in channel networks junction-point water stage prediction and correction(JPWSPC) method three-phase algorithms efficiency |
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