局部淤堵排水管道水力冲击特性的CFD模拟研究
PDF下载 (189)王天赐,黄 标,杨 志,王春凌.局部淤堵排水管道水力冲击特性的CFD模拟研究[J].宁波大学学报(理工版),2024,37(2):65-71.DOI:10.20098/j.cnki.1001-5132.2023.0341
WANG Tianci,HUANG Biao,YANG Zhi,WANG Chunling.CFD simulation study on hydraulic impact characteristics of partially silted drainage pipelines[J].Journal of Ningbo University(Natural Science & Engineering Edition),2024,37(2):65-71.DOI:10.20098/j.cnki.1001-5132.2023.0341
| Title: | CFD simulation study on hydraulic impact characteristics of partially silted drainage pipelines |
| 作者: | 王天赐, 黄 标, 杨 志, 王春凌 |
| Author(s): | WANG Tianci, HUANG Biao, YANG Zhi, WANG Chunling |
| 关键词: | 排水系统; 管道淤积; 管道固体障碍物; 水流冲击力; 受力变化 |
| Keywords: | drainage system; pipeline sedimentation; solid obstacles in pipelines; water flow impact pressure; force variation |
| 分类号: | TU992.4 |
| DOI: | 10.20098/j.cnki.1001-5132.2023.0341 |
| 文献标识码: | A |
| 摘要: | 在市政排水管道中, 长时间运行会导致排水管道发生局部淤堵, 降低过流能力, 对排水管道正常运行产生影响. 本文针对存在局部淤堵的圆形截面排水管道构建了水汽两相流数值模型, 利用CFD手段模拟研究了非恒定入流边界下的局部淤堵排水管道水力特性, 量化分析了不同初始条件下淤积或障碍物的受力情况. 结果分析表明: 在干管初始条件下, 冲击瞬间障碍物受力达到最大值, 该冲击力可用射流公式近似计算, 相对误差小于10%; 而在湿管条件下, 水流对于障碍物的冲击力相较干管有显著下降. 此外在湿管条件下, 障碍物受水流冲击的强度还与初始条件下障碍物的淹没条件密切相关. |
| Abstract: | n municipal drainage pipelines, long term operation can cause local blockage, reduce the flow capacity, and affect the normal operation of drainage pipelines. This study presents a numerical model of two-phase air-water flow for circular cross-section drainage pipes with localized clogging, the hydraulic characteristics of drainage pipes with localized clogging under non-steady inflow boundaries were simulated using CFD mothods, and the force exerted on sedimentation or obstacles under different operating conditions was quantitaively analyzed. The results analysis showed that under dry-pipe initial conditions, the maximum force on the obstacle occurs during the impact moment, and this impact force can be approximated using the jet impinging with a relative error of less than 10%. On the other hand, under wet-pipe conditions (with base flow initially), the impact force of water flow on obstacles is significantly lower than that of dry-pipe conditions. In addition, under wet-pipe conditions, the intensity of the impact of increased flow on obstacles is closely related to the initial submerged conditions. |
| 参考文献 /References: | [1].WANG K, WU Y, FAN Q D. Construction of rainstorm security pattern based on waterlogging prevention and control: a case study on Zhengzhou City[J]. Alexandria Engineering Journal, 2022, 61(11):8911-8918. [2].JIANG W W, YU J. Impact of rainstorm patterns on the urban flood process superimposed by flash floods and urban waterlogging based on a coupled hydrologic- hydraulic model: a case study in a coastal mountainous river basin within southeastern China[J]. Natural Hazards, 2022, 112(1):301-326. [3].李华飞. 大管径排水管道水力清淤技术研究[D]. 重庆: 重庆大学, 2012. [4].CHEBBO G, BACHOC A, LAPLACE D, et al. The transfer of solids in combined sewer networks[J]. Water Science and Technology, 1995, 31(7):95-105. [5].SAFARI M J S, MOHAMMADI M, AB GHANI A. Experimental studies of self-cleansing drainage system design: a review[J]. Journal of Pipeline Systems Engineering and Practice, 2018, 9(4):04018017. [6].CARRERA F C, LA M E J. Graphical design tools to determine the minimum self-cleansing slope in small diameter sanitary sewers[J]. Ingenieria Del Agua, 2020, 24(1):49-63. [7].SAFARI M J S, AKSOY H. Experimental analysis for self-cleansing open channel design[J]. Journal of Hydraulic Research, 2021, 59(3):500-511. [8].OEHY C D, SCHLEISS A J. Control of turbidity currents in reservoirs by solid and permeable obstacles[J]. Journal of Hydraulic Engineering, 2007, 133(6):637-648. [9].PARKER G. Conditions for the ignition of catastro- phically erosive turbidity currents[J]. Marine Geology, 1982, 46(3/4):307-327. [10].CHOI S U. Layer-averaged modeling of two-dimensional turbidity currents with a dissipative-Galerkin finite element method part II: sensitivity analysis and experimental verification[J]. Journal of Hydraulic Research, 1999, 37(2):257-271. [11].BRADFORD S F, KATOPODES N D. Hydrodynamics of turbid underflows. I: formulation and numerical analysis[J]. Journal of Hydraulic Engineering, 1999, 125 (10):1006- 1015. [12].QIAN Y, ZHU D Z. Impact pressure on an orifice plate by a rising water column driven by an air pocket in a vertical riser[J]. Water Science and Technology: Journal of the International Association on Water Pollution Research, 2020, 81(5):1029-1038. [13].吴永妍. 输水明渠的无压隧洞及进口过渡段水动力性能研究[D]. 北京, 2017. [14].卢渊博. 排水管道淤积过流特性与点源污染扩散规律研究[D]. 郑州: 郑州大学, 2020. [15].张亚琦. 综合管廊排水管道堵塞识别理论与试验研究[D]. 北京, 2019. [16].桑浪涛, 石烜, 张彤, 等. 城市污水管网中污染物冲刷与沉积规律[J]. 环境科学, 2017, 38(5):1965-1971. [17].GOORMANS T, ENGELEN D, BOUTELIGIER R, et al. Design of self-cleansing sanitary sewer systems with the use of flushing devices[J]. Water Science and Technology: Journal of the International Association on Water Pollution Research, 2009, 60(4):901-908. [18].SOARES-FRAZÃO S. Experiments of dam-break wave over a triangular bottom sill[J]. Journal of Hydraulic Research, 2007, 45(Suppl.1):19-26. [19].SOARES-FRAZÃO S, ZECH Y. Experimental study of dam-break flow against an isolated obstacle[J]. Journal of Hydraulic Research, 2007, 45(Suppl.1):27-36. [20].BUKREEV V I. Force action of discontinuous waves on a vertical wall[J]. Journal of Applied Mechanics and Technical Physics, 2009, 50(2):278-283. [21].BUKREEV V I, ZYKOV V V. Bore impact on a vertical plate[J]. Journal of Applied Mechanics and Technical Physics, 2008, 49(6):926-933. [22].NOURI Y, NISTOR I, PALERMO D, et al. Experimental investigation of tsunami impact on free standing structures[J]. Coastal Engineering Journal, 2010, 52(1): 43-70. [23].张健, 方杰, 范波芹. VOF方法理论与应用综述[J]. 水利水电科技进展, 2005, 25(2):67-70. [24].ROULUND A, SUMER B M, FREDSØE J, et al. Numerical and experimental investigation of flow and scour around a circular pile[J]. Journal of Fluid Mechanics, 2005, 534:351-401. [25].BELTAOS S. Oblique impingement of plane turbulent jets[J]. Journal of the Hydraulics Division, 1976, 102(9): 1177-1192. [26].董淑芳, 何同溪. 曼宁公式在管道水头损失计算中适用性的讨论[J]. 山东建筑工程学院学报, 1998(1):100- 103. [27].PAN Y F, ZHANG Y L, ZHANG D K, et al. Effect of polymer and conventional molds on the aesthetical surface quality of concretes[J]. Construction and Building Materials, 2021, 302:124375. |
| 备注/Memo: | 收稿日期: 2023−03−28. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 浙江省自然科学基金（LY21E090003）; 浙江省省属高校基本科研专项（SJLZ2021004）. 第一作者: 王天赐, 硕士研究生, 主要研究方向: 市政排水管道淤积. E-mail: wabgtian123456@163.com *通信作者: 黄标, 博士/副教授, 主要研究方向: 城市水力学、市政管网模拟与监测. E-mail: huangbiao@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
