Aeration by plunging water jets is an effective and economical method of transferring oxygen into the receiving pool of water. A dispersion of air bubbles occurs underneath the pool surface as a high-velocity liquid jet plunges on the water surface after being ejected from a particular fall height. The present study aims to investigate the impact of jet velocity, jet length, water depth and jet thickness of plunging hollow jets in oxygenating the water in the aeration tank. Empirical correlations are proposed for the determination of volumetric oxygen transfer coefficient based on jet velocities and jet kinetic powers. Moreover, the oxygen transfer capacity of single hollow jet, double hollow jet and a dual jet (combined hollow and solid) is tested by keeping a nearly constant jet flow area through the jet openings. The observations recorded from the experimental analysis lead to the development of predictive relationships for estimating the values of volumetric oxygen transfer coefficient in terms of basic jet variables.

通过注入水来充气是将氧气转移到接收池中的一种有效且经济的方法。当高速液体射流从特定的跌落高度喷出后，在水表面突然掉落时，气泡的散布会在水池表面下方发生。本研究的目的是研究注入速度，射流长度，水深和中空射流的射流厚度对充气池中水的充氧的影响。提出了基于射流速度和射流动能确定体积氧转移系数的经验相关性。此外，通过使通过喷射口的喷射流面积保持恒定，来测试单空心喷射，双空心喷射和双喷射（组合的空心和固体）的氧气传输能力。