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JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)  2018, Vol. 52 Issue (12): 2406-2413    DOI: 10.3785/j.issn.1008-973X.2018.12.019
Materials Science     
Numerical simulation for dynamic air spray painting of arc surfaces
CHEN Wen-zhuo, CHEN Yan, ZHANG Wei-ming, HE Shao-wei, LI Bo, JIANG Jun-ze
Department of Petroleum, Army Logistics University, Chongqing 401331, China
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A paint deposition model was established comprising a two-phase spray flow field model and an impinging and sticking model based on the Euler-Euler approach. The control domain for spray painting of the outer and inner arc surfaces and a plane surface were divided into moving region and stationary region, where the calculation meshes were generated, respectively. The spring smoothing model coupled with the region remeshing model was adopted to achieve the dynamic change of the meshes in the moving regions. Based on the finite volume method, the model was discretized by the second order upwind scheme and the discretized equations were solved by the PC-SIMPLE algorithm. The results of the spray field simulation show that the spray flow field is flattened in Y direction and spreads along the X direction by the impact of the air stream provided by the fan holes, and the spray field slightly tilts back away from the spray gun due to the motion of the spray gun. The results of the paint thickness distribution show that the maximum value of the film thickness distribution on the outer arc surface is smaller than that on the flat plane, while that on the inner arc surface is bigger than that on the flat plane; the film width on the inner arc surface is larger than that on the flat plane, while that on the outer arc surface is smaller than that on the flat plane. The simulated results are in good agreement with the experiments, which verifies the feasibility of the proposed models for the numerical simulation of dynamic spray painting.

Received: 15 January 2018      Published: 13 December 2018
CLC:  TG174.442  
Cite this article:

CHEN Wen-zhuo, CHEN Yan, ZHANG Wei-ming, HE Shao-wei, LI Bo, JIANG Jun-ze. Numerical simulation for dynamic air spray painting of arc surfaces. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2018, 52(12): 2406-2413.

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