Image processing analyses of the factors influencing the angle of an atomizer spray cone
ZHANG Simin1, WANG Guolei2, YU Qiankun1, HUA Xiaotong1, SONG Libin1, CHEN Ken1
1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; 2. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
Abstract：The relationship between the spray process parameters and the atomizer spray cone angle must be well understood for establishing accurate spray gun models. However, traditional experimental methods cannot easily provide sufficient experimental data, such as measurements of the spray pattern size. This paper presents a method to measure the atomizer cone angle by using image processing to identify the edges on an atomizer cone image. This method was then used in an experimental study of the relationship between the shaping air pressure, the atomizing air pressure and the flow rate on the atomizer cone angle. The results show that the shaping air pressure is positively correlated with the angle of the long axis of the atomizer cone and negatively correlated with the angle of the short axis of the atomizer cone. The atomizing air pressure is positively correlated with the angles of the long and short axes of the atomizer cone and the fluid flow rate. The atomizing air pressure is also coupled with the shaping air pressure. The fluid flow rate has a relatively small effect on the atomizer cone angle.
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2019, Vol. 59 
