About the experiment, these experiments were conducted in the free stream wind tunnel, and vitiated air heater was used to simulate the high altitude flow condition.
本文试验在自由射流风洞中进行，利用空气加热器模拟高空飞行条件。
From the view of fluid mechanics, the shear-free air water interface corresponds to a slip boundary condition in fluid and relatives to the concept of effective slip length.
从流体力学的角度来看，这个无剪切界面对应着流体中的滑移边界条件，而与此相关的概念是有效滑移长度。
The relationship between hydraulic condition and bubble point of bubble free aeration, as well as the effects of hydraulic condition and air pressure on aeration were also discussed.
对中空纤维膜无泡曝气进行了试验研究，考察了中空纤维膜的高效曝气性能，探讨了水力条件与无泡曝气泡点的关系，以及水力条件和曝气压强对曝气效果的影响。
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