水跃区水流脉动压力相似律的试验研究  

Investigations on the Similarity Theory of Fluctuating Pressures in the Hydraulic Jump Region

作　　者：张声鸣 

出　　处：《长江科学院院报》1991年第4期1-9,共9页Journal of Changjiang River Scientific Research Institute

摘　　要：本文通过孔口出流平底二元自由水跃5个相对比尺的132组模型试验,获得了水跃区内底板上跃首佛氏数从2.94～8.61,雷诺数从2×10~4～6×10~5的水流脉动压力资料。对不同比尺的试验结果进行对比分析,推导了水流脉动压力的幅值和频率比尺。得到的结果是脉动压力的幅值比尺为模型长度比尺,即P_T~′=L(?)符合重力相似律。脉动压力的频率比尺为1,即f_T=1不符合重力相似律。This paper deals with similarity of fluctuating pressure of a two-dimensional hydraulic jump on the apron below the outlet, which were tested on five different scale models witn relative ratio from 1 :1 to 1:10, 132 sets of data were measured on these models. The Froude number of the flow at the constriction section in the test is ranging from 2. 94 to 8. 61 ,the Reynolds number from 2.0 × 104 to 6× 105. From data analysis, it is concluded that the similarity theory of fluctuating pressure in flow of the hydraulic jump region is Pr = LT, fr = 1.

关 键 词：水跃区 压力脉动 水流 佛劳德数 

分 类 号：TV131.33[水利工程—水力学及河流动力学]