【摘要】 本文利用最近研制成功的微电脑掺气浓度实时量测和数据处理系统,对混合流各序列流态的掺气浓度进行了量测,分析了混合流掺气浓度的分布规律、从而证明了混合流确系射流与水跃流的混合流动。同时还初步探明局部水力现象中自掺气的结果,与消能效果之间并不存在必然的联系。更多还原

【Abstract】 An experimental study of air entrainment characteristics of the 2-D combined flow, i.e. the universal local hydraulic phenomena composed of water jets and hydraulic jumps, is made by using an air concentration meter equipped with a microcomputer. Air concentration distribution in the flow is presented, and the pulsation characteristics of air concentration in the flow is also analysed. Some emperical formulas to describe air entrainment characteristics are deduced, based on the data taken in the experiment. The initial results show that the air entrainment may not closely correlate with the efficiency of energy dissipation.更多还原