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可以根据将气体喷入水柱中所产生的含气率与起泡剂浓度关系对起泡剂进行分类。气泡尺寸通过影响气泡上升速度进而影响水中的含气率:水中含气率升高导致气泡上升速率增加和气泡尺寸减小。本文研究了这种对应关系并描述了测定气泡尺寸的方法。使用MIBC作为起泡剂,研究了两个浓度范围内水中含气率与起泡剂浓度之间的对应关系:低浓度范围内,含气率变化不大;高浓度范围内,含气率稳定升高。第一种情况下,气泡尺寸并没有减小足以降低气泡上升速度的程度。第二种情况下,含气率升高与小气泡数量稳定增加有关,但是采用Sauter平均直径并没有观测到小气泡的增加。最后,在相同的含气率下研究了不同起泡剂产生的气泡尺寸。气泡尺寸变化很大。这表明起泡剂种类(化学)影响单个气泡或气泡群上升速度。
The foaming agent can be classified according to the gas content produced by spraying the gas into the water column in relation to the concentration of the foaming agent. The bubble size affects the gas content in the water by influencing the rate of bubble rise: the increase of the gas content in the water results in an increase of the bubble rise rate and a decrease of the bubble size. This paper examines this correspondence and describes a method for measuring bubble size. Using MIBC as the foaming agent, the corresponding relationship between gas-bearing water content and foaming agent concentration in two concentration ranges was studied: the gas concentration did not change much in the low concentration range; and in the high concentration range, the gas content was stable Rise. In the first case, the bubble size did not decrease enough to reduce the rate of bubble rise. In the second case, the increase in gas content is associated with a steady increase in the number of small bubbles, but no increase in small bubbles is observed with Sauter mean diameter. Finally, the bubble size produced by different foaming agents was investigated at the same gas content. Bubble size varies widely. This indicates that the type of blowing agent (chemical) affects the rate of rise of individual bubbles or groups of bubbles.