水跃区脉动壁压的大涡模拟  

A Numerical Simulation of Fluctuating Wall-pressure in Hydraulic Jumps Base on LES Method

作　　者：李名川[1] 刘昉[2] 

机构地区：[1]二滩水电开发有限责任公司,成都610051 [2]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《中国农村水利水电》2012年第11期97-99,共3页China Rural Water and Hydropower

摘　　要：应用大涡紊流模型,对水跃区脉动壁压特性进行的数值计算。研究表明,通过合理选择固体壁面的当量粗糙度和Smagorinsky常数,可以得到计算域内任意点的脉动压强时程线。与试验结果对比可知,由大涡模拟得到脉动壁压的时均值、标准差、概率密度和功率谱密度等与试验结果吻合较好,表明可以应用大涡模拟方法研究水流的脉动壁压。Based on LES method, the characteristics of fluctuating wall-pressure are simulated. The results indicate that by choosing wall roughness and Smagorinsky constant correctly, the dynamic pressure against time of any position in the computing region can be computed. Compared with physical model test data, the results show that the time-average value, standard deviation, probability density and power spectral density of the fluctuating wall-pressure in simulation are basically consistent with the measured ones. This confirms the ability of LES on the study of fluctuating wall-pressure in the flow.

关 键 词：水跃 脉动壁压 数值模拟 大涡模型 

分 类 号：TV143[水利工程—水力学及河流动力学]