多股多层水平淹没射流的试验研究  

Experimental Study on Multi-horizontal Submerged Jets

作　　者：李艳玲[1] 杨永全[1] 华国春[1] 张建民[1] 

机构地区：[1]四川大学水电学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2004年第6期32-36,共5页Journal of Sichuan University (Engineering Science Edition)

摘　　要：从模型试验的角度,测量了消力池内底板压力分布规律、水面流态、流速分布和脉动压强,着重分析了泄水孔出口体型、表中孔高程、跌坎形式、表中孔间中隔墩长度等体型参数对流态稳定性、水力特性和消能率的影响,研究了消能机理。研究表明,该新型消能形式具有流态稳定、适应性强、低雾化、高消能率的特点。结合某实际工程,提出中孔泄槽以等宽或微收缩为宜,表中孔最优坎高差应大于中孔水流的主流水深、延长隔墩有利于稳定水流流态等建议,为工程设计提供了科学依据。The pressure distribution, velocity distribution, flow pattern and fluctuating pressure are surveyed in model test by means of physical model test. Several important factors which affect the hydraulic characteristics and energy dissipation mechanism of MHSJ are studied. The results show that MHSJ is a good energy dissipation type with more dissipated energy rate, less food fogging and well applicability. Connecting to certain project, some suggestions to design are put forward, such as the chute width of intermediate outlet should be constant, the optimum height difference of drop between intermediate outlet and surface outlet should be larger than the water depth at intermediate outlet, long dividing pier is helpful to the stability of the flow.

关 键 词：多股多层水平淹没射流 水力特性 消能机理 

分 类 号：TV139.16[水利工程—水力学及河流动力学]