淹没水跃导墙上脉动压力的幅频特性  

Pressure fluctuations acting on vertical guide wall in submerged hydraulic jump

作　　者：马吉明[1] 杨开林[1] 

机构地区：[1]清华大学水利水电工程系,中国水利水电科学研究院

出　　处：《水利学报》1996年第12期70-75,83,共7页Journal of Hydraulic Engineering

摘　　要：本文用实验方法研究淹没水跃条件下导水墙面板上脉动压力的幅频特性．根据实验结果，文中给出了各测压点脉动压力的均方根值表，脉动压力分布曲线，最大脉动压力的预期值及其变化范围，并将其与其它工程资料比较．除此之外，文中还给出了脉动压力的主频率表，不同频率区间对脉动压力贡献的百分比，还讨论了面板不同部位的主要压力脉动源及影响脉动压力的因素．The paper studies the properties of the amplitude and frequency spectra of pressure fluctuations acting on vertical guide wall in submerged hydraulic jump. Based on the experiment results,the data tables of root-mean-square pressure and main frequencies of pressure fluctuations are given. Furthermore some curves related to the distributions of r.m.s.pressures and their maximum values, which are compared with engineering data are drawn. Formula which can be used to calculate the maximum r.m.s pressure is obtained. In addition, the percentage contributed to the pressure by vortexes in different frequencies are shown. The main sources of pressure fluctuations are analyzed.

关 键 词：脉动压力 紊流 淹没水跃 漩涡 导水墙 溢流坝 

分 类 号：TV131.21[水利工程—水力学及河流动力学] TV652.1