本文对自由燃烧电弧中传热与流动进行了数值模拟，计算域除包括电弧本身外，还包括阴极与阳极。为了避免等离子体鞘层中复杂的物理过程给模拟所带来的困难，对阴、阳极鞘层分别进行了简化处理。文中讨论了不同形式的能量方程及其离散格式对计算结果的影响。并在求解能量方程时，考虑了电极－等离子体交界面处特殊的传热机理。
Modeling results concerning a free-burning argon arc are presented in thispaper. The calculation domain includes the arc itself and the electrodes.Temperature-dependent plasma properties at LTE state are employed for thearc region, while the electrode sheaths are treated with a simplified method.The effects of using different types of energy equation and its discretizationschemes on the numerical results are examined. Special treatments at theplasma-electrode interfaces are also adopted in the modeling.
参考文献
| [1] | Hsu K C;Etemadi K;Pfender E .Study of the Free-BurningHigh-Intensity Argon Arc[J].Journal of Applied Physics,1983,54(03):1293-1301. |
| [2] | Kovitya P;Lowke J J .Two-Dimensional Analysis of Free Burning Arcsin Argon[J].Journal of Physics D:Applied Physics,1985,18(01):53-70. |
| [3] | Kovitya P;Cram L E .A Two-Dimensional Model of Gas-Tungsten WeldingArcs[J].Welding Journal,1986,65(12):34-39. |
| [4] | Schmidt H.-P.;Speckhofer G. .Experimental and theoretical investigation of high-pressure arcs. I. The cylindrical arc column (two-dimensional modeling)[J].IEEE Transactions on Plasma Science,1996(4):1229-1238. |
| [5] | Lowke JJ.;Haidar J.;Morrow R. .A SIMPLIFIED UNIFIED THEORY OF ARCS AND THEIR ELECTRODES[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,1997(14):2033-2042. |
| [6] | 李和平;陈熙.自由燃烧电弧的二维数值模拟[J].哈尔滨工业大学学报,1999(31):139-143. |
| [7] | 韩鹏;陈熙.关于对流--导热耦合传热问题整体求解法的讨论[A].北京,1997:32-37. |
| [8] | Khosla P K;Rubin S G .A Diagonally Dominant Second-Order AccurateImplicit Scheme[J].Computers and Fluids,1974,2:207-209. |
| [9] | Cram L E .A Model of the Cathode of a Thermionic Arc[J].Journal of Physics D:Applied Physics,1983,16:1643-1650. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%