摘要
通过模型试验，研究了水平旋流内消能泄洪洞壁面压强及脉动特性。研究结果表明，在各流态下，随着上、下游水位的升高壁面压强随之增加，沿程逐渐减小；在Z／D=0．5-4．5范围内，压强变化剧烈，过渡段的性质非常明显，流态不同时规律不同；脉动压强主频在0．03—1．6Hz，属于低频范围，优势频率主要集中在0—20Hz之间；壁面脉动压强振幅概率分布基本上呈现高斯正态分布；但在水平段首（Z／D=0—4．5）和尾（Z／D=29-水平段出口）Ca、Ce均要略大于理论值。
Based on the model test, this paper studied the wall pressure and the pulsation characteristic of flood discharge tunnel with horizontal swirling flow. Results indicated that, for various flow patterns, wall pressure increase with the H and h increases,and the longitudinal wall pressure decreases along the tunnel. In the scope of Z/D =0.5 - 4.5, the intensity of pressure changes sharply, the nature of transition section is extremely obvious, the rule is different when the fluid pattern is different. The basic frequency of pulsation pressure, which belongs to the low frequency scope, is in 0.03 - 1.6 Hz. The dominant frequency mainly concentrates in 0 - 20 Hz; The amplitude probability distribution of wall pulsation pressure is in the Gauss normal distribution; but in the head （ Z/D = 0 - 4.5 ） and tail （ Z/D = 29 - horizontal section export） of the level section Cs, Ce are larger than the theoretical value slightly.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2008年第1期32-37,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(50479025)
四川大学水力学与山区河流开发保护国家重点实验室开放基金资助项目(0302)
关键词
水平旋转
内消能泄洪洞
模型试验
脉动压强
时均压强
horizontal swirling flow
flood discharge tunnel with inner energy
model test
pulsation pressure
time-averaged pressure
