Modeling of arcs with binary gas mixtures in a multi-arc plasma generator Lichtbogenmodellierung in einem Multielektroden-Plasmagenerator mit binären Gasgemischen

IF 1.2 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
K. Bobzin, H. Heinemann, M. Erck, S. Warkentin, O. Mokrov, R. Sharma, U. Reisgen, K. Jasutyn
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Abstract

Using plasma as an energy source in thermal spraying allows the processing of feedstock materials with high melting temperatures. In plasma spraying, hydrogen or nitrogen is commonly injected into the argon plasma, which increases the specific enthalpy and thermal conductivity. The objective of this study is to improve the understanding of this process through numerical simulation and to investigate the impact on the plasma properties. A comprehensive modelling approach for the electrodes in the three-cathode plasma generator is built upon the previous work of the authors. The plasma is described as an electromagnetically reactive fluid in local thermodynamic equilibrium using temperature-dependent thermodynamic and transport properties. The increase of flow temperature and velocity as well as the temperature distribution at the electrodes can be successfully simulated. The simulation model could accelerate parameter development for new coating systems in the future. This study completes the simulation model for multi-arc plasma spraying using binary gas mixtures.

Abstract Image

多电弧等离子体发生器中二元气体混合物的电弧建模
在热喷涂中使用等离子体作为能量源,可以处理具有高熔融温度的原料。在等离子喷涂中,通常在氩等离子体中注入氢气或氮气,以增加比焓和导热系数。本研究的目的是通过数值模拟来提高对这一过程的理解,并研究其对等离子体特性的影响。三阴极等离子体发生器中电极的综合建模方法是建立在作者先前工作的基础上的。等离子体被描述为一种局部热力学平衡的电磁反应流体,使用温度依赖的热力学和输运性质。可以很好地模拟出流动温度和速度的变化以及电极处的温度分布。该仿真模型可以加速未来新型涂层系统参数的开发。本研究完成了二元混合气体多弧等离子喷涂的仿真模型。
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来源期刊
Materialwissenschaft und Werkstofftechnik
Materialwissenschaft und Werkstofftechnik 工程技术-材料科学:综合
CiteScore
2.10
自引率
9.10%
发文量
154
审稿时长
4-8 weeks
期刊介绍: Materialwissenschaft und Werkstofftechnik provides fundamental and practical information for those concerned with materials development, manufacture, and testing. Both technical and economic aspects are taken into consideration in order to facilitate choice of the material that best suits the purpose at hand. Review articles summarize new developments and offer fresh insight into the various aspects of the discipline. Recent results regarding material selection, use and testing are described in original articles, which also deal with failure treatment and investigation. Abstracts of new publications from other journals as well as lectures presented at meetings and reports about forthcoming events round off the journal.
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