摘要
对蒸发冷凝法制备纳米粉体装置的加热源——真空自由燃烧氦电弧进行了研究。阐述了电弧的构造及电位分布,介绍了电弧产热的机理。在满足一定基本假设的前提下,文中给出了电弧的控制方程。运用有限元理论,构建了自由燃烧电弧的计算模型,运用AN SY S8.0对电弧的温度场进行了模拟,并应用类比法验证了本文构建的计算模型及模拟结果的正确性。
Investigates the free combustion in vacuum due to helium-arc, which is the heat source for the evaporation-condensation system to prepare nanopowder. Describes the formation of helium arc and relevant potential distribution, as well as the heat transfer from the arc. Some basic conditions are assumed, thus giving a control equation for the arc. A model is developed to calculate the free combustion due to helium-are by use of FEM. In addition, the software ANSYS 8.0 is applied to the simulation of the temperature field of helium-are, and an analogy is drawn between the results calculated via the models proposed and the simulation to verify the effectiveness of the former.
出处
《真空》
CAS
北大核心
2006年第4期58-61,共4页
Vacuum
基金
国家863计划资助项目(2002AA302608)
中国矿业大学青年科研基金顶目(E200410)
关键词
温度场
电弧
数值模拟
蒸发冷凝法
temperatue field
arc
numerical simulation
evaporation-condensation process
