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工程科学与技术:2012,44(3):1-6
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X型与Y型宽尾墩流道内水流特性研究
(1.四川大学 水力学与山区河流开发保护国家重点实验室;2.西华大学 建筑与土木工程学院)
Hydraulics of Flow in Gate Chamber with X-shaped and Y-shaped Flaring Gate Piers
(1.State Key Lab. of Hydraulics and Mountain River Eng., Sichuan Univ.;2.Inst. of Architecture and Civil Eng., Xihua Univ.)
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投稿时间:2012-01-04    修订日期:2012-03-05
中文摘要: 宽尾墩改变了流道内水力参数分布,采用RNG k-ε双方程紊流模型,定量分析了沿程水位与流速的变化。结果表明,X型宽尾墩边墙水面壅高程度在闸室段前75%范围内,约从0增大至0.2,后25%区域内增幅较大。Y型壅高程度略高于X型,两者的差别在闸室段后25%范围内呈现增加趋势。宽尾墩使得闸室段中部速度梯度减小,且Y型墩对速度梯度的影响较X型更为强烈。受逐渐扩宽的墩体尾部影响,闸室出口速度方向和大小发生改变,速度沿水深的分布极为不均,特别是水流抛射方向的显著变化与水平方向速度分量的大幅提高(与平尾墩相比)。文中提出的水面壅高程度可为工程中闸门铰链支座的布置提供参考,闸室出口速度定量分析有助于深入理解宽尾墩抛射水流在空中纵向与竖向扩散的成因。
中文关键词: X型宽尾墩  Y型宽尾墩  水面壅高  速度
Abstract:The distributions of hydraulic parameters in the gate chamber change due to flaring gate piers (FGPs). The variations in water level and velocity were analyzed quantitatively using RNG k-εturbulent model. The extent of water level rising on side walls with X-shaped FGP increased from zero to 0.2 during the first 75% of gate chamber, and it grown rapidly during the last 25%. The extent of water level rising with Y-shaped FGP was slightly higher than that with X-shaped and the difference rised during the last 25% of gate chamber. The FGP decreased the velocity gradient in the middle part of gate chamber and the Y-shaped FGP impacted the gradient stronger than X-shaped. FGPs made changes for both the direction and magnitude of velocity in the outlet. The distribution of velocity assumed extremely non-uniform, especially the significant change of direction and the great increase in the horizontal velocity (compared to ordinary pier). The extent of water level rising is a reference for the arrangement of hinge supports, and the quantitative analysis on the velocity is helpful for understanding the longitudinal and vertical developments of flow.
文章编号:201200016     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(51109149);教育部博士点基金资助项目(20110181120093)
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引用文本:
王波,伍平,陈云良.X型与Y型宽尾墩流道内水流特性研究[J].工程科学与技术,2012,44(3):1-6.
Wang Bo,Wu Ping,Chen Yunliang.Hydraulics of Flow in Gate Chamber with X-shaped and Y-shaped Flaring Gate Piers[J].Advanced Engineering Sciences,2012,44(3):1-6.