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喷雾过程中,液滴蒸发涉及液滴与周围环境的传热、传质以及动量交换,是影响喷雾效果的重要因素.本文针对单个液滴的蒸发过程,假设液滴内部温度符合三次多项式分布,建立了一种可反映液滴内部温度分布且计算简单高效的新型液滴蒸发液相模型.以Decane油滴蒸发为例,对比了集总参数液相模型、二次多项式温度分布液相模型与三次多项式温度液相模型对液滴蒸发率与温度分布的影响.结果表明,新的三次多项式模型能够较好地反映蒸发过程中涡流与导热对内部温度分布特性的影响,既可较好地预测液滴蒸发率,又能较准确地计算液滴蒸发初始阶段内部的温度分布.“,”Droplet evaporation is a common physical phenomenon including heat,mass and momentum transfer between a single droplet and the ambient gas with fundamental importance in extensive engineering applications.A new liquid phase model is developed to consider internal temperature distribution for droplet evaporation with high computational efficiency by formulating a new energy equation based on the assumption of a cubic polynomial temperature distribution inside the droplet.The case of Decane droplet evaporation is simulated to compare the evaporation rate and internal temperature distribution by lump model,conduction limit model,effective conductivity model,parabolic temperature distribution model and cubic polynomial temperature distribution model.The results indicate that the new cubic polynomial temperature distribution model well predicts droplet evaporation rate and droplet internal temperature characteristics.