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深隧系统多工况入流冲击滞留气团分析

汪怡然 俞晓东 刘甲春 张健 徐辉

汪怡然, 俞晓东, 刘甲春, 张健, 徐辉. 深隧系统多工况入流冲击滞留气团分析[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20211053
引用本文: 汪怡然, 俞晓东, 刘甲春, 张健, 徐辉. 深隧系统多工况入流冲击滞留气团分析[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20211053
WANG Yiran, YU Xiaodong, LIU Jiachun, ZHANG Jian, XU Hui. Multiple-Mode Transient Inflow Impact with Entrapped Air Pocket in Deep Storage Tunnel Systems[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20211053
Citation: WANG Yiran, YU Xiaodong, LIU Jiachun, ZHANG Jian, XU Hui. Multiple-Mode Transient Inflow Impact with Entrapped Air Pocket in Deep Storage Tunnel Systems[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20211053

深隧系统多工况入流冲击滞留气团分析

doi: 10.3969/j.issn.0258-2724.20211053
基金项目: 国家自然科学基金(52179062,51879087)
详细信息
    作者简介:

    汪怡然(1994—),男,博士研究生,研究方向为流体机械及水利水电工程,E-mail:wangyr1210@126.com

    通讯作者:

    俞晓东(1985—),男,副教授,研究方向为水电站及泵站水力学,E-mail:yuxiaodong_851@hhu.edu.cn

  • 中图分类号: TU992.1

Multiple-Mode Transient Inflow Impact with Entrapped Air Pocket in Deep Storage Tunnel Systems

  • 摘要:

    深隧系统作为一种有效的城市内涝防治措施,在多竖井入流时存在气团滞留,可能引发压力振荡等问题,从而威胁系统的运行安全. 依托苏州河段深隧工程,建立双竖井单隧洞深隧系统模型,采用计算流体力学方法进行数值计算,并通过模型充水试验进行验证,分析多工况入流冲击所导致的气团滞留对压力波动的影响,并总结其规律. 结果表明:在设计入流工况下,3.5%的气团滞留可导致最大压力达到35.36 m,相当于控制水位竖井静压的1.77倍;当竖井总入流量恒定时,流量分配对压力的影响较小,而对称入流时极值压力最大,比单侧入流分别偏高3%和6%;在对称入流情况下,随着总入流量的增加,气团的最大压力会先增加后趋于稳定,在总入流量为116 m3/s时,相较于29 m3/s时增大约30%.

     

  • 图 1  双竖井单隧洞几何模型

    Figure 1.  Geometric model of dual shaft and single tunnel

    图 2  网格划分与无关性验证

    Figure 2.  Grid division and independence verification

    图 3  极值入流条件不同气团体积分数瞬态压力对比

    Figure 3.  Comparison of transient pressure with different air-pocket volume fractions under extreme inflow conditions

    图 4  极值入流冲击1.5%气团瞬态水气交界面对比

    Figure 4.  Fig. 4 Comparison of transient water-air interface of 1.5% air pocket under extreme inflow impact

    图 5  不对称入流瞬态压力与最大压力对比

    Figure 5.  Comparison between transient pressure and maximum pressure of asymmetric inflow

    图 6  对称入流瞬态压力与最大压力对比

    Figure 6.  Comparison between transient pressure and maximum pressure of symmetric inflow

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出版历程
  • 收稿日期:  2021-12-30
  • 修回日期:  2022-05-11
  • 网络出版日期:  2024-03-13

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