Numerical Simulation of the Twin-Wire Arc Spraying Process: Modeling the High Velocity Gas Flow Field Distribution and Droplets Transport

作者：Chen Yongxiong^*; Liang Xiubing; Wei Shicheng; Chen Xi; Xu Binshi

来源：Journal of Thermal Spray Technology, 2012, 21(2): 263-274.

DOI：10.1007/s11666-011-9723-0

• gas flow field modeling
• gun head design
• particle transport
• twin-wire arc spraying process

During the twin-wire arc spraying, a high velocity gas stream is used to accelerate the arc-melting materials and propel the droplets toward the substrate surface. This study is aimed at investigating the gas flow formation and droplets transport processes using numerical simulation method. Results from the 3-D gas flow field model show that the distribution of the gas flow velocity on the twin-wire intersection plane is quite different from that on the twin-wire vertical plane. Based on the 3-D model, the convergence amplitude of the high velocity zone in the jet center is improved by modifying the gun head design. It is also observed that a flat substrate existed downstream from the gas nozzle exit results in decreasing close to zero in velocity of the gas jet near the substrate. In addition, the predicted droplet trajectories and velocity distributions exhibited good agreement with experimentally observations.

• 出版日期2012-3
• 单位中国人民解放军装甲兵工程学院