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对燃料液滴在高压不稳定环境中的蒸发进行了研究,着重讨论了气相介质压力振荡对液滴蒸发特性的影响,计算了C12H26液滴在N2介质中蒸发时的蒸发速率、滴温和无因次滴径随时间的变化。结果表明:(1)蒸发速率、滴温发生相同频率的振荡,相位滞后分别为。和。/2;(2)压力振荡使蒸发速率平均值增大,液滴生存时间减少;(3)在不定常加热阶段压力振荡影响很小。
The evaporation of fuel droplets in high pressure and unstable environment was studied. The influence of pressure oscillation of liquid medium on the evaporation characteristics of droplets was emphatically discussed. The evaporation rate of C12H26 droplets in evaporation in N2 medium was calculated. Droplet diameter changes with time. The results show that: (1) the evaporation rate, the temperature drop occurred at the same frequency oscillation, phase lag respectively. with. / 2; (2) The pressure oscillation increases the average evaporation rate and decreases the droplet survival time; (3) The pressure oscillation has little effect during the unsteady heating phase.