摘 要：为提高喷嘴雾化效率，基于维多辛斯曲线理论对喷嘴出口结构进行优化，研制出一种新型渐缩式空气雾化喷嘴，并搭建了喷雾实验平台进行实验。利用图像处理技术对实验数据进行分析，提取不同结构喷嘴的喷雾粒径和雾化锥角分布，通过对比仿真和试验结果分析喷嘴气液夹角对雾化效果的影响。研究表明：喷嘴喷雾实验和仿真结果较吻合，相对误差在6.5%以内；喷嘴气液夹角α=20时，雾化锥角最大，液滴索特尔平均直径最小，雾化效果最好。

Abstract:To enhance the atomization efficiency of a nozzle,the structure of the nozzle at the outlet was optimized based on the Witozinsky curve theory and a novel converging type air atomized nozzle was developed with an atomization test platform being set up for conducting various tests.The image processing technology was used to perform an analysis of the test data to extract the distribution of the particle diameter and the cone angle atomized by using the nozzle with various structures.Through contrasting the simulation results with the test ones,the influence of the inclusion angle between the gas and liquid inside the nozzle on the atomization effectiveness was analyzed.It has been found that the atomization test results of the nozzle are in relatively good agreement with the simulation ones and the relative error is within a range of 6.5%.When the inclusion angle between the gas and liquid inside the nozzle α=20?,the atomization cone angle will be the maximum and the Sauter mean diameter of the droplets will be the minimum,therefore,the atomization effectiveness will be the best.

TK17

国家自然科学基金（51205255）；国家科技支撑计划（2015BAK16B04）