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气体雾化技术可以制备一系列高性能超细球形金属粉末.利用计算流体动力学软件Fluent模拟了雾化气体压强(P0)对超音速气雾化喷嘴气体流场的影响,以及对流场中心线上压强、速度等变化的影响规律.研究结果表明:随着P0的增大,流场内气流达到的最大速度逐渐增加;当雾化气体压强较小时,抽吸压强(ΔP)随雾化气体压强增大而减小;而当雾化气体压强达到某一临界值时,ΔP才随雾化气体压强增大而增大;抽吸压强的变化与雾化室中心线上滞止压强和马赫碟位置的变化相一致,滞点位置对抽吸压强的作用不大;导液管顶端径向分布的静压强存在一个压强梯度,并且随着雾化气体压强的增加而增大.
Gas atomization technology can prepare a series of high-performance ultrafine spherical metal powders.Using computational fluid dynamics software Fluent to simulate the influence of atomizing gas pressure (P0) on the gas flow field of supersonic aerosol nozzle, Line pressure and velocity, etc. The results show that as the P0 increases, the maximum velocity reached by the airflow in the flow field increases gradually. When the pressure of the atomization gas is small, the suction pressure (ΔP) increases with the atomization Gas pressure increases and decreases; and when the pressure of atomized gas reaches a certain critical value, ΔP only increases with the increase of atomizing gas pressure; the change of suction pressure and the stagnation pressure on the center line of the atomization chamber and Mach disk position changes consistent, stagnation point position on the suction pressure is not big; catheter tip radial distribution of static pressure there is a pressure gradient, and with the increase of atomizing gas pressure increases.