摘要
通过天桥水电站除险加固工程水工模型试验,推导出了面流界限水深理论和经验计算公式,并与前期研究成果进行了对比.分析了面流界限水深的影响因素,发现当鼻坎挑角由0°变化到15°,面流界限水深逐渐降低;在护坦加长和下游水流空间性的双重影响下,面流界限水深值增大;降低河床高程或增大坎高,面流发生范围将会扩大.
Through hydraulic model test of Tianqiao hydropower station reinforcing project,the theoretical equation and empirical equation of the surface flow critical water depth had been researched and compared with others.Some factors affected the change of surface flow pattern and critical water depth had been analyzed.It was found that the change of critical water depth values was neglect when nose angle changed from zero degree to fifteen degrees,lengthening the protection-apron and flow expansion result in the ascent of critical water depth values,the critical water depth values would descend if the bed level is reduced,or the nose height is increased.
出处
《华北水利水电学院学报》
2009年第5期13-16,共4页
North China Institute of Water Conservancy and Hydroelectric Power
基金
黄河天桥水电站除险加固工程项目(HSY-SL-194)
关键词
天桥水电站
水工模型试验
面流界限水深
水力计算
影响因素
Tianqiao hydropower station
hydraulic model test
surface flow critical water depth
hydraulic calculation
influencing factors
