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为了研究温度场引起的蒸发传质对荷电二次雾化的影响,采用蒸发模型及临界荷质比公式对液滴的不同温度条件下的稳态温度及其临界荷质比变化进行了计算,获得了液滴的稳态温度值的变化趋势及其寿命范围内蒸发作用下的临界荷质比。研究结果表明:不同初始表面温度的液滴处于相同的环境温度时,稳态温度最终会趋于一致,且初始表面温度越高,非稳态蒸发过程越短;初始表面温度一定的液滴处于不同的环境温度时,稳态温度随环境温度的升高而升高,且环境温度越高,非稳态蒸发过程越短;液滴初始粒径及环境温度一定,液滴的初始表面温度接近稳态温度时,破碎所需要的临界荷质比最小,且临界荷质比在初始表面温度在高于稳态温度时较初始表面温度低于稳态温度时要大;液滴的初始粒径和初始表面温度一定时,破碎所需要的临界荷质比随环境温度的升高而升高。
In order to study the influence of evaporation mass transfer on secondary charged atomization caused by temperature field, the steady-state temperature and the critical charge-to-mass ratio change of liquid droplets under different temperature conditions were calculated by using the evaporation model and the critical charge-to-mass ratio formula , The change tendency of the steady-state temperature value of the droplet and the critical charge-to-charge ratio under the evaporation of its lifetime are obtained. The results show that when the droplets with different initial surface temperatures are at the same ambient temperature, the steady-state temperature will eventually converge, and the higher the initial surface temperature, the shorter the unsteady evaporation process. The droplets with the initial surface temperature are at At different ambient temperatures, the steady-state temperature increases with the ambient temperature, and the higher the ambient temperature, the shorter the unsteady evaporation process. The initial droplet size and ambient temperature are constant, and the initial surface temperature of the droplet approaches When the steady state temperature is reached, the critical charge-to-mass ratio required for crushing is the smallest, and the critical charge-to-mass ratio is larger when the initial surface temperature is higher than the steady-state temperature than when the initial surface temperature is lower than the steady-state temperature. When the initial surface temperature is constant, the critical charge-to-charge ratio required for crushing increases with increasing ambient temperature.