The relationship between the air concentration and the scour depth can be expressed as an exponential function . aeration does not affect the shape of scour hole 掺气浓度c _对冲坑深度的影响,可表达为掺气浓度与冲坑无量纲深度的幂函数关系。
Applying the k - e turbulence model , the distributions of air concentration are predicted for the air - water flow below an aerator . the validity of the numerical solution is demonstrated by the comparison between value measured and calculated 紊流模型计算了强迫掺气设施后的水气两相流,计算结果与实测值的比较表明,所采用的预测方法是行之有效的。
A kind of measurement was developed to measure the air concentration of water and the result showed the possibility of entrained air existing near the wall of drop shaft . that is to say , the wall of drop shaft may be protected by entrained air from cavitation damage to some extent 本文设计了一种适用于近壁区水流掺气浓度测量的方法,对空腔段水流掺气浓度进行初步测量,发现井壁附近水流存在掺气的可能,这对改善水流空化条件能起到积极作用。
The ratio of the length to the depth of scour hole decreases with the increasing scour depth , in spite of the reason is the increase of the air concentration , the decrease of the jet velocity or the decrease of the jet thickness . 5 . governing equations of the aerated jet flow are established 掺气对冲坑形态并没有实质性的影响,冲坑的宽深比随冲坑深度的减小而增大,无论造成冲坑深度减小的原因四) 1大学i学博士学位论文是掺气、降低流速还是减小入射水舌厚度,其变化规律都可用相同的直线关系表示。
The square pattern has been obtained for the first time in dielectric barrier ar / air discharge at atmospheric pressure by using the double water electrodes and its spatio - temporal dynamics is measured by optical method . the phase diagram of pattern types as a function of air concentration and applied voltage by fixing other parameters is given 本论文采用特殊设计的双水电极介质阻挡放电实验装置,首次在氩气与空气的混合气体中获得了大气压常温下的稳定正方网格斑图,并对其进行了时空动力学测量。