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本文分析了掺气槽空腔区射流底缘气水界面上空气掺入水体过程的作用因素及受力情况，认为掺气是由于气水界面紊动涡体的脉动作用造成自由表面局部凹曲率超过临界值而发生的；建立了临界掺气流速和射流挟气量的理论表达式，它反映了影响射流掺气特性的各种因素及其相互关系，提出的射流挟气量公式得到部分原模型资料的验证，研究表明，射流挟气量受多种因素的影响，其中来流的紊动度是影响掺气的重要因素，研究初步揭示出模型和原型通气量不相似是由于糙率较小所致，表明运用加糙措施是消除模型通气量缩尺效应的一种有效途径。
In this paper, we analyze the factors that affect the process of air mixing into the water at the gas-water interface at the bottom of the jets in the aeration tank cavities, and consider that the aeration is due to the concave curvature of the free surface due to the pulsation of the turbulent scroll at the gas-water interface The critical aeration flow rate and jet entrained gas flow rate are established, which reflect the various factors that affect the aeration characteristics of the jet and their interrelationships. The proposed jet entrained gas flow rate formula obtains some of the original model data The results show that the jet entrained air volume is affected by many factors, of which the turbulence of the incoming flow is an important factor affecting the aeration. The preliminary study reveals that the difference between the model and the prototype ventilation is due to the small roughness , Indicating that the use of roughing measures is an effective way to eliminate the scale effect of model ventilation.