高速熔融镍液滴撞击不锈钢基板数值模拟  

Numerical Simulation of High Speed Molten Nickel Droplet Impacting on the Stainless Steel Substrate

作　　者：康奥 吴念初 KANG Ao;WU Nianchu(School of Mechanical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《辽宁石油化工大学学报》2025年第2期68-75,共8页Journal of Liaoning Petrochemical University

基　　金：辽宁省教育厅基本科研项目(LJ212410148054)。

摘　　要：采用VOF模型模拟了熔融镍液滴在等离子喷涂沉积过程中的凝固和飞溅现象,并通过动量方程与流体体积法相结合的方法分析了颗粒的自由表面;利用焓法对包含相变的热传递过程进行了建模;通过设定三组不同的实验条件,模拟镍液滴形成涂层的过程,深入分析了镍涂层的形成机理。结果表明,液滴的撞击速度越大,其扩展系数越大,并且在喷涂过程中会产生飞溅现象;基板温度越高,液滴的扩散距离越大;液滴直径越大,扩散距离越大,但并非呈严格的线性关系,并且其凝固形成的薄片越厚。The solidification and splash phenomena of Ni during plasma spray deposition were simulated by VOF model.The Navier-Stokes equations are solved in combination with the volume-of-fluid technique to track the free surface of the particles.In addition,the heat transfer including phase change is modeled using the enthalpy method.The coating formation process of nickel droplets at high speed was simulated by setting three different experimental conditions.The formation mechanism of nickel coating was analyzed deeply.During the spraying process of different speeds,the diffusion coefficient of higher droplet speed is greater than that of slower speed and there will be splash.In the case of different substrate temperatures,the higher the substrate temperature,the farther the molten particle tiling distance is.In addition,the diameter of the molten droplet is changed.Under the same other simulation conditions,the larger the particle diameter,the larger the spread distance,but it is not linearly related,and the larger the particle,the greater the thickness of the solidified sheet.

关 键 词：VOF模型 等离子喷涂 凝固 镍 涂层 

分 类 号：TG146[一般工业技术—材料科学与工程]