无气喷涂涂料成膜建模研究  

Modeling of Airless Spray Coating Film Formation

作　　者：杨桂春 陈雁 陈诗明 姜俊泽 YANG Gui-chun;CHEN Yan;CHEN Shi-ming;JIANG Jun-ze(Department of Petroleum,Oil and Lubricants Army Logistics Academy,Chongqing 401331,China)

机构地区：[1]陆军勤务学院油料系,重庆401331

出　　处：《机械设计与制造》2024年第5期219-222,228,共5页Machinery Design & Manufacture

基　　金：喷涂机器人涂料雾化机理及特性研究(KJZD-M201912901);复杂形面空气喷涂涂料成膜机理及规律研究(51475469)。

摘　　要：针对无气雾化喷涂的喷涂过程,提出了一种基于欧拉-拉格朗日法的涂料成膜建模方法。建立符合RosinRammler分布的雾化模型;在流场中建立离散相的受力平衡方程以及连续相的质量方程和动量方程,采用标准k-ε模型来对连续相的动量方程进行封闭;在粘附沉积模型中通过建立质量方程和动量方程来求解涂层厚度。将计算域网格分成喷嘴计算域和待喷平面计算域,采用四面体和六面体的混合网格来对计算域进行划分,用PC-SIMPLE算法来求解模型。最后通过实验来对动态喷涂模拟进行验证,数值模拟结果与实验整体吻合较好。证明欧拉-拉格朗日方法可以用来研究无气喷涂的成膜过程。Aiming at the spraying process of airless atomization spraying,a coating film forming model based on Euler-Lagrangian method is proposed.A Rosin-Rammler atomization model was established.The force equilibrium equation of the dis-crete phase and the continuity equation and momentum equation of the continuous phase are established in the flow field.The mo-mentum equation of the continuous phase is closed by the standard k-εmodel.The continuity equation and momentum equation are established in the adhesion deposition model to solve the coating thickness.The computational domain grid is divided into nozzle computational domain and plane computational domain,and the mixed grid of tetrahedron and hexahedron is used to di-vide the computational domain.PC-SIMPLE algorithm was used to solve the model.Finally,the dynamic spraying simulation is verified through experiments,and the numerical simulation results are in good agreement with the experiments as a whole.It is proved that the established film forming model can be used to study the film forming process of airless spraying.

关 键 词：无气喷涂 成膜模型 动态喷涂 欧拉—拉格朗日法 

分 类 号：TH16[机械工程—机械制造及自动化] TQ639[化学工程—精细化工]