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 mass transfer caused by evaporation due to temperature field on the charged spray of secondary atomization,we calculated the steady-state temperature and the critical mass ratio by adopting evaporation model and the critical mass ratio formula under different temperature conditions,and obtained the steady-state temperature tendency and critical mass ratio in its life as a result of evaporation.The results indicate that:steady-state temperature will reach unanimity even though the initial surface temperature is different but hold the same ambient temperature,and the initial surface temperature is higher,the process of non-steady state evaporation is shorter;Steady-state temperature increases with ambient temperature when the ambient temperature varies but the initial surface temperature is fixed,the time of non-steady state evaporation is inverse to environment temperature;Initial droplet size and ambient temperature remains the same,when the initial surface temperature is close to the steady-state temperature,droplet breakup needs the least critical charge-to-mass ratio,when the initial surface temperature is higher than steady temperature,its critical charge-to-mass ratio is bigger,whereas the critical charge-to-mass ratio is smaller when initial surface temperature is lower than the steady temperature;When the initial surface temperature and droplet diameter are fixed,the critical charge-to-mass ratio increases with ambient temperature during evaporation.