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| 涉河桥梁阻水影响因素研究 |
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丁伟1,唐洪武2,戴文鸿2,肖洋2
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1. 河海大学水利水电学院,江苏南京,210098
2. 河海大学水利水电学院,江苏南京210098;水文水资源与水利工程科学国家重点实验室,江苏南京210098;河海大学水资源高效利用与工程安全国家工程研究中心,江苏南京210098
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| 摘要: |
| 采用VOF(volume of fluid)方法和标准κ-ε模型,对涉河桥梁桥墩附近河段三维流场进行了精细模拟,通过不断改变桥墩宽、桥墩数、桥梁跨径、桥墩和水流的夹角、桥梁和水流的夹角和桥墩的布置形式等,进一步分析各个因素对桥梁壅水的影响.计算分析成果表明桥墩在桥梁稳定的前提下,减少其宽度可以有效地降低壅水高度,同时双圆柱型桥墩有利于降低壅水高度.桥墩轴线尽可能顺应水流流向,桥梁轴线尽可能与水流流向垂直,至少要将夹角控制在65°以上. |
| 关键词: 桥梁壅水 数值模拟 VOF方法 |
| DOI： |
| 分类号:TV131.2 U442.3 |
| 基金项目:水利部公益性科研专项经费项目(200901005); 国家自然科学基金面上项目(50779014); 中央高校基本科研业务费专项资金资助项目(2009B02214); 江苏高校优势学科建设工程资助项目(水利工程) |
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| On resistance factors of river bridges |
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DING Wei1,TANG Hong-wu2,DAI Wen-hong2,XIAO Yang2
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DING Wei1,TANG Hong-wu1,2,3,DAI Wen-hong1,XIAO Yang1,3(1.College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China,2.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,3.National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety,China)
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| Abstract: |
| Three dimensional flow fields around bridge piers are simulated accurately by using VOF method and standard model.Factors affecting blocking water of piers including width of bridge piers,numbers of bridge piers,angle of axis of bridge pier and flow direction,angles between axis of bridge and flow direction and arrangement form of bridge piers reacting on blocking water height are analyzed in this paper.Analysis shows that VOF model can be used to track the free surface flow and applicable to numerical simu... |
| Key words: blocking water of bridges numerical simulation volume of fluid method |
