Investigations of Spray Painting Processes Using an Airless Spray Gun

This paper presents experimental and numerical studies on spray painting processes by using airless spray guns for ship painting. A computational fluid dynamics code was applied to calculate the flow field and the droplet trajectories. Droplet size distributions and droplet velocities as necessary inlet characteristics for the simulations were experimentally obtained using a Spraytec Fraunhofer type particle sizer and laser-Doppler anemometry. Effects of shoreline winds and painting distance on the transfer efficiency and on the paint film thickness distributions on the target were numerically studied.

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木质的窗棂上还氤氲着雨后的气息,凌霄花的枝丫在窗前颤颤巍巍地抖落着雨丝,天边水雾般的云朵在日光边缘若隐若现。学校老旧的墙上棕红色的漆体逐渐落下,罅隙间还有着蚂蚁的行踪,偶尔长出的几朵小黄花,逆着光发呆。操场边围了圈锈迹斑斑的铁栏,顺着出口,是一道走廊,顶上除了长满杂草。