Abstract: Based on the study and analysis of Y-shaped atomizers and their atomization mechanism, a new-type of fan-shaped spray atomizer is developed and experimentally studied. The flowrate, atomizing angle and Sauter mean diameter (SMD) in the center of spray under different air and liquid pressures, and the SMD spatial distribution of certain working conditions in transverse and axial directions are investigated. By fitting liquid flowrates with equation of Y-shaped atomizer, the values of coefficients suitable for fan-shaped atomizers are obtained, m=0.39, b=0.98. The atomizing angle a is approximately between 90o and 98o and varies within narrow limit. The droplet size distribution of spray in transverse direction is in a "W" shape, and in axial direction the SMD decreases gradually and becomes steady eventually.

Key words: fan-shaped, liquid atomization, atomizer, droplet size distribution

摘要： 在对Y型喷嘴结构和雾化机理研究分析的基础上，设计了一种新型的扇形雾化喷嘴，并对该喷嘴进行了实验研究. 实验测量了不同气、液压力下扇形雾化喷嘴的流量、雾化角和索特尔平均粒径及其在空间上的横向和纵向分布. 通过对液流量用Y型喷嘴设计公式进行拟合，得到了公式中适合扇形雾化喷嘴设计的系数取值：m=0.39, b=0.98. 喷雾雾化角a大约在90o~98o之间，变化不大. 喷雾的索特尔平均粒径在空间横向呈类似"W"的分布，在空间纵向呈逐渐降低并趋于稳定的分布.

关键词: 扇形, 液体雾化, 喷嘴, 液滴粒度分布