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采用VOF两相数值方法建模前后移动的双正癸烷液滴在高温对流空气中的燃烧过程,分析了不同液滴中心间距对前后液滴燃烧速率的影响。结果表明:液滴蒸发可分为预热期和稳定蒸发期,在液滴生存期的大部分时间内,基本满足d~2定律,且存在一定变形;前后布置时,上游液滴的燃烧速率和单液滴燃烧速率相近,低雷诺数下,下游液滴的燃烧速率随液滴中心间距增大而增大,最终趋于单液滴的燃烧速率。
The combustion process of di-n-decane droplets moving around and behind in the high-temperature convection air was modeled by the VOF two-phase numerical method, and the influence of the distance between the different droplets on the burning rate of the droplets was analyzed. The results show that the droplet evaporation can be divided into the preheating period and the steady evaporation period. During most of the droplet life, the law of d ~ 2 is basically satisfied and there is a certain deformation. When the front and back are arranged, the burning rate At the low Reynolds number, the burning rate of the downstream droplets increases with the increase of the center distance of the droplets, and finally tends to the burning rate of the single droplets.