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在喷管出口和基板之间外加电场来加速带电颗粒,并对带电纳米铜颗粒进行电场辅助冷喷涂气固两相流数值研究,分析在气流和电场力的综合作用下颗粒粒径、电荷量、基板电压等参数对颗粒速度的影响。结果表明,电场辅助冷喷涂不适合微米级颗粒,但非常适合纳米颗粒喷涂,且粒径越小,颗粒撞击速度越大,电场力加速效果越显著;颗粒电荷量、基板电压越大,颗粒撞击速度越高。
Electric field was applied between nozzle outlet and substrate to accelerate the charged particles. The numerical simulation of gas-solid two-phase flow was carried out by electric field-assisted cold spraying on the charged nano-copper particles. The effects of gas flow and electric field on particle size, , Substrate voltage and other parameters of the particle velocity. The results show that electric field assisted cold spraying is not suitable for micron-sized particles, but it is very suitable for nano-particle spraying. The smaller the particle size is, the larger the particle impact velocity is and the greater the accelerating effect of electric field force is. The larger the particle charge and the substrate voltage are, The higher the speed.