Research on Droplet Properties in Atomization using Optical Imaging Measurements

To study the properties of atomization, the atomized droplet parameters were analyzed using an optical method based on imaging measurements. For the experiments, a liquid flow rate control and metering apparatus was developed. Then, the tests were conducted on various liquid pressure and orifice diameter conditions at different measurement positions according to the influence factors in atomization. Finally, the diameter and velocity distribution of the atomized droplets were acquired, and the variations of the mean droplet diameter and velocity were analyzed in detail. The results indicate that both the diameter and velocity distributions of the atomized droplets are subject to log normal (LN) distribution, the average droplet diameter is negatively while the average droplet velocity is positively related with liquid pressure and orifice diameter near the spray outlet, and the detection position impacts the atomizing properties a lot.