论文部分内容阅读
为研究液相等离子体电解渗过程中施加的工作电压与工件表面温度的关系,建立了以工件—气膜—电解液三相体系为研究对象的热传导物理模型。等离子电解处理时,工件表面被一层连续而稳定的等离子体气膜所包围,气膜将工件与电解液分开,气膜与工件边界的温度即为工件表面的温度。建立气膜的热传导方程,采用第一类和第二类边界条件求解气膜中的温度分布,从而得到工件表面温度计算的表达式。实际测量了不同工作电压时工件的温度,理论计算的工件表面温度与实验测温结果都表明,随着工作电压的增大,工件表面温度不断增加。当温度计算模型中的气膜热导率是温度的函数、气膜电导率为常数的条件下,理论计算结果与实验结果符合程度最好。
In order to study the relationship between working voltage and workpiece surface temperature applied in the process of liquid plasma electrolysis, a physical model of heat conduction based on the workpiece-gas-electrolyte three-phase system was established. Plasma electrolysis treatment, the workpiece surface is a continuous and stable plasma film surrounded by a gas film and the workpiece separated from the electrolyte, the film and the workpiece boundary temperature is the temperature of the workpiece surface. The heat transfer equation of the gas film is established, and the temperature distribution in the gas film is solved by using the boundary conditions of the first type and the second type to obtain the expression of the surface temperature calculation. The actual measured temperature of the workpiece with different operating voltage, the theoretical calculation of the workpiece surface temperature and experimental temperature results show that with the increase of operating voltage, the workpiece surface temperature increases. When the thermal conductivity of the gas film in the temperature calculation model is a function of temperature and the conductivity of the gas film is constant, the theoretical calculation results are in good agreement with the experimental results.