| 引用本文: | 苏凌宇,刘卫东.运动液滴蒸发时传热传质过程的理论分析.[J].国防科技大学学报,2008,30(5):10-14.[点击复制] |
| SU Lingyu,LIU Weidong.Theoretical Analysis of Heat and Mass Transfer of Moving Droplet during Evaporation[J].Journal of National University of Defense Technology,2008,30(5):10-14[点击复制] |
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| 运动液滴蒸发时传热传质过程的理论分析 |
| 苏凌宇, 刘卫东 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 对突然置入气体环境中的运动液滴的非稳态蒸发过程进行了传热传质过程的理论分析，建立了初始瞬间液滴非稳态蒸发的数学模型，并对模型进行数值求解。结果表明，在一定情况下，运动液滴突然置于气体环境中的初始瞬间，由于气液界面上与周围环境之间存在较大的浓度差，使得液滴在初始瞬间的蒸发速率很大，将会使气液界面的温度有所下降，这一温度的下降范围与液滴的初始温度、环境的初始温度以及液滴的运动速度有关。 |
| 关键词: 液滴蒸发 传热传质 理论分析 |
| DOI： |
| 投稿日期：2008-03-05 |
| 基金项目:教育部新世纪优秀人才支持计划(NCET)资助 |
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| Theoretical Analysis of Heat and Mass Transfer of Moving Droplet during Evaporation |
| SU Lingyu, LIU Weidong |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Theoretical analysis of heat and mass transfer is developed for the unsteady evaporation of a moving droplet which is suddenly placed into the gas circumstances. A mathematical model is proposed for the unsteady evaporation process of a droplet at the first moment and is solved by numerical method. The results indicate that the evaporation rate is very high for a moving droplet suddenly placed into the gas circumstance at the initial moment, which can make the temperature of droplet surface decline. The scope of the temperature decline is concerned with the initial temperature of the droplet, gas circumstances, and the initial velocity of the moving droplet as well. |
| Keywords: droplet evaporation heat and mass transfer theoretical analysis |
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