新疆某工程表孔溢洪洞水工模型试验研究  

Study of a hydraulic model of the overflow surface spillway tunnel for one project in Xinjiang

作　　者：葛彩莲[1] 

机构地区：[1]水利部新疆维吾尔自治区水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《水科学与工程技术》2017年第2期62-64,共3页Water Sciences and Engineering Technology

摘　　要：通过建立表孔溢洪洞减压模型试验,在不同水位泄流条件下,对泄洪洞的进口段、竖井段的水流流态、动水压力、水流空化数进行观测分析,试验结果显示:进口为稳定的溢流堰自由泄流,进口及竖井水流流态较好,溢流堰跌坎及竖井环形掺气坎后均能形成稳定的掺气空腔;溢流堰面、竖井内的压力分布合理;水流空化数均满足规范要求,不会发生空化水流。By establishing pressure relief model test of the overflow surface spillway tunnel, under the condition of, we made a observation and analysis to water flow regime and hydrodynamic water pressure and flow cavitation number of the entrance region and the shaft section of the tunnel spillway in the different water discharge. The results show that： the import was stabilized free overflow for overflow weir , the water flow regime was well at the import and the vertical shaft, the falling-sill of overflow weir and vertical shaft formed a stabilized aerated cavity after emplacing circular aeration; The distribution of the pressure is reasonable at the surface of overflow weir and in the vertical; The flow cavitation coefficient can satisfy the requirements of specification, and the phenomenon of cavitation flow will not happening.

关 键 词：水流流态 动水压力 减压模型 水流空化数 

分 类 号：TV135.2[水利工程—水力学及河流动力学]