摘要
为验证光滑粒子流体动力学方法的计算程序对自由表面大变形问题的模拟结果是否准确,基于光滑粒子流体动力学方法,建立溃坝模型,通过与物理模型试验结果对比,两者自由液面相似度为91.7%,内部压强分布合理,说明该程序能相对准确模拟流体大变形问题。在此基础上,建立了拱坝泄流模型,模拟了中孔泄流冲击水垫塘过程,结果显示:下泄水流流动连续,未见明显非物理振荡现象;开始泄流时中孔压强为14 kPa;中孔水流冲击下游水垫塘时最大流速为5.1 m/s。数值模型能相对准确地模拟出拱坝中孔泄流过程,未来有望应用于中孔泄流分析及坝身优化设计中。
In order to verify the accuracy of the program of smoothed particle hydronamics method in the simulation of large deformation of free surface,a dam break model is established based on smoothed particle hydrodynamics method.Compared with the experimental results of physical model,the similarity of free liquid surface is 91.7%,and the internal pressure distribution is reasonable.It shows that the program can simulate the large deformation of fluid relatively accurately.On this basis,the mesohole discharge model is established,and the process of the meso-orifice discharge impacting the cushion pool is simulated.the results show that the downflow is continuous,there is no obvious non-physical oscillation,and the mesohole pressure is 14 kPa at the beginning of the discharge.the maximum velocity of the midhole flow impacting the downstream cushion pool is 5.1 m/s.The numerical model accurately simulates the discharge process of the mesohole,which is expected to be used in the analysis of the discharge of mesohole and the optimization design of dam body in the future.
作者
张建伟
主攀
陈海舟
杜宇
ZHANG Jianwei;ZHU Pan;CHEN Haizhou;DU Yu(College of Water Conservancy,North China University of Water Resources and Hydropower,Zhengzhou 450046,China;Shanghai Daodun Technology Co.,Ltd.,Shanghai 200131,China)
出处
《华北水利水电大学学报（自然科学版）》
北大核心
2022年第1期61-68,共8页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
国家自然科学基金项目(51679091)。
关键词
光滑粒子流体动力学方法
中孔泄流
水垫塘
过程仿真
smoothed particle hydrodynamics method
meso-orifice discharge
water cushion pond
process simulation
