泥沙冲刷模拟的FLOW-3D数值方法研究
|
摘要
泥沙冲刷是很多水利工程中常见的现象,采用FLOW-3D的数值模拟手段来研究泥沙冲刷应用广泛。从水射流冲刷泥沙角度,对FLOW-3D泥沙冲刷时网格质量和泥沙模型参数的选择对于冲刷效果的影响进行研究,提出了一种网格的设置方法,确定了泥沙模型中影响射流冲刷泥沙过程的关键参数。结果表明:泥沙模型参数中临界体积分数越大,悬浮的泥沙量越少;水下休止角需要通过试验测量验证;挟带系数越大,随冲刷起动的沙更多;推移质系数越大,沉积物沿河床的传输量越大。研究成果可为FLOW-3D在泥沙冲刷的应用提供一定的参考。
Sediment erosion is a common phenomenon in many hydraulic projects. FLOW-3 D numerical simulation is widely used to study sediment erosion. From the point of view of water jet scouring sediment, the influence of grid quality and parameters of sediment model on scouring effect in FLOW-3 D sediment scouring was studied. A grid setting method was proposed, and the key parameters affecting the process of jet scouring sediment in sediment model were determined. The results show that the larger the maximum packing fraction of sediment model parameters, the less suspended sediment; the angle of repose needs to be verified by experimental measurements; the larger the entrainment coefficient, the more sediment will start with scouring; and the larger the bed load coefficient, the larger the sediment transport along the river bed. This study can provide some reference for the application of FLOW-3 D in sediment erosion.
Sediment erosion is a common phenomenon in many hydraulic projects. FLOW-3 D numerical simulation is widely used to study sediment erosion. From the point of view of water jet scouring sediment, the influence of grid quality and parameters of sediment model on scouring effect in FLOW-3 D sediment scouring was studied. A grid setting method was proposed, and the key parameters affecting the process of jet scouring sediment in sediment model were determined. The results show that the larger the maximum packing fraction of sediment model parameters, the less suspended sediment; the angle of repose needs to be verified by experimental measurements; the larger the entrainment coefficient, the more sediment will start with scouring; and the larger the bed load coefficient, the larger the sediment transport along the river bed. This study can provide some reference for the application of FLOW-3 D in sediment erosion.
引文
[1]黄雄合，许栋，及春宁，等.明渠砂质床面桩柱冲刷与导流防护试验研究[J].水利水电技术, 2013,48(11):128-133.HUANG Xiong-he, XU Dong, JI Chun-ning, et al. Experimental study on scouring around pile-column in sand-bed of open channel and relevant flow guiding protection measure[J]. Water Resources and Hydropower Engineering, 2013, 48(11):128-133.
[2]姜萌，张杰峰，陈兵.海洋平台立管系统底部局部冲刷试验研究[J].中国海洋平台，2014,29(2):45-49,56.JIANG Meng, ZHANG Jie-feng, CHEN Bing. The laboratory test of local scour around the bottom of a platform riser system[J]. China Ocean Platform, 2014, 29(2):45-49, 56.
[3]张浩，倪福生，顾磊.某靶距下射流垂直冲刷坑深的实验研究[J].科学技术与工程，2014,14(2):238-240.ZHANG Hao, NI Fu-sheng, GU Lei. An experimental study on depth of dynamic scour by vertical water jets at a height[J]. Science Technology and Engineering, 2014, 14(2):238-240.
[4]顾磊，倪福生，徐立群,等.垂直射流冲刷砂床的喷嘴间距试验研究[J].泥沙研究，2017,42(3):54-58.GU Lei, NI Fu-sheng, XU Li-qun, et al. Experimental study on nozzle distance of sand bed scour by impinging water jets[J]. Journal of Sediment Research, 2017, 42(3):54-58.
[5]褚濛.低层房屋风荷载的数值模拟研究[D].上海：同济大学，2008.CHU Meng. Numerical simulation of wind loads on low-rise buildings[D]. Shanghai:Tongji University, 2008.
[6]周丽丹.海底管道的冲刷发生机理及涡激振动特性研究[D].天津:天津大学，2016.ZHOU Li-dan. Scour mechanism and characteristics of vortexinduced vibrations of a submarine free spanning pipelines[D]. Tianjin:Tianjin University, 2016.
[7]王建军，倪福生.二维垂向淹没射流冲刷粗砂砂床的数值模拟[J].科学技术与工程，2014,14(3):108-111.WANG Jian-jun, NI Fu-sheng. Numerical simulation of coarse sandy bed scour by 2D vertical submerged jet[J]. Science Technology and Engineering, 2014, 14(3):108-111.
[8]顾磊，倪福生，李雯，等.喷嘴间距对双股平面射流冲刷的影响[J].泥沙研究，2016(6):32-37.GU Lei, NI Fu-sheng, LI Wen, et al. The influence of nozzle spacing on the scouring of double plane jet[J]. Journal of Sediment Research,2016(6):32-37.
[9] MASTBERGEN D R, VAN DEN BERG J H. Breaching in fine sands and the generation of sustained turbidity currents in submarine canyons[J]. Sedimentology, 2003, 50(4):13.
[10] GUO J. Hunter rouse and shields diagram[J]. Advances in Hydraulics and Water Engineering, 2002, 2:1 069-1 098.
[11] MEYER-PETER E, M?LLER R. Formulas for bed-load transport[C]//Proceedings of IAHR 2nd meeting. Stockholm:1948.
[12]孟然.海底管道后挖沟技术实验研究及数值模拟[D].天津:天津大学，2012.MENG Ran. Experimental study and numerical simulation of back trenching technology for submarine pipeline[D]. Tianjin:Tianjin University, 2012
[13] SOULSBY R. Ch. 9:bedload transport. Dynamics of marine sands[M]. London:Thomas Telford Publications, 1997.
[14] RIBBERINK J S. Bed-load transport for steady flows and unsteady oscillatory flows[J]. Coastal Engineering, 1998, 34(1):59-82.
[2]姜萌，张杰峰，陈兵.海洋平台立管系统底部局部冲刷试验研究[J].中国海洋平台，2014,29(2):45-49,56.JIANG Meng, ZHANG Jie-feng, CHEN Bing. The laboratory test of local scour around the bottom of a platform riser system[J]. China Ocean Platform, 2014, 29(2):45-49, 56.
[3]张浩，倪福生，顾磊.某靶距下射流垂直冲刷坑深的实验研究[J].科学技术与工程，2014,14(2):238-240.ZHANG Hao, NI Fu-sheng, GU Lei. An experimental study on depth of dynamic scour by vertical water jets at a height[J]. Science Technology and Engineering, 2014, 14(2):238-240.
[4]顾磊，倪福生，徐立群,等.垂直射流冲刷砂床的喷嘴间距试验研究[J].泥沙研究，2017,42(3):54-58.GU Lei, NI Fu-sheng, XU Li-qun, et al. Experimental study on nozzle distance of sand bed scour by impinging water jets[J]. Journal of Sediment Research, 2017, 42(3):54-58.
[5]褚濛.低层房屋风荷载的数值模拟研究[D].上海：同济大学，2008.CHU Meng. Numerical simulation of wind loads on low-rise buildings[D]. Shanghai:Tongji University, 2008.
[6]周丽丹.海底管道的冲刷发生机理及涡激振动特性研究[D].天津:天津大学，2016.ZHOU Li-dan. Scour mechanism and characteristics of vortexinduced vibrations of a submarine free spanning pipelines[D]. Tianjin:Tianjin University, 2016.
[7]王建军，倪福生.二维垂向淹没射流冲刷粗砂砂床的数值模拟[J].科学技术与工程，2014,14(3):108-111.WANG Jian-jun, NI Fu-sheng. Numerical simulation of coarse sandy bed scour by 2D vertical submerged jet[J]. Science Technology and Engineering, 2014, 14(3):108-111.
[8]顾磊，倪福生，李雯，等.喷嘴间距对双股平面射流冲刷的影响[J].泥沙研究，2016(6):32-37.GU Lei, NI Fu-sheng, LI Wen, et al. The influence of nozzle spacing on the scouring of double plane jet[J]. Journal of Sediment Research,2016(6):32-37.
[9] MASTBERGEN D R, VAN DEN BERG J H. Breaching in fine sands and the generation of sustained turbidity currents in submarine canyons[J]. Sedimentology, 2003, 50(4):13.
[10] GUO J. Hunter rouse and shields diagram[J]. Advances in Hydraulics and Water Engineering, 2002, 2:1 069-1 098.
[11] MEYER-PETER E, M?LLER R. Formulas for bed-load transport[C]//Proceedings of IAHR 2nd meeting. Stockholm:1948.
[12]孟然.海底管道后挖沟技术实验研究及数值模拟[D].天津:天津大学，2012.MENG Ran. Experimental study and numerical simulation of back trenching technology for submarine pipeline[D]. Tianjin:Tianjin University, 2012
[13] SOULSBY R. Ch. 9:bedload transport. Dynamics of marine sands[M]. London:Thomas Telford Publications, 1997.
[14] RIBBERINK J S. Bed-load transport for steady flows and unsteady oscillatory flows[J]. Coastal Engineering, 1998, 34(1):59-82.