U.S.-France Cooperative Research: Study of the Dynamic Characteristics of Plasma Spray Torches

这个为期三年的奖项将支持美国明尼苏达大学和利摩日大学研究小组在等离子辅助制造方面的美法合作研究。美国调查人员是Joachim Heberlein和Emil Pfender，法国调查人员是Pierre Fauchais。他们的研究目的是进行诊断实验，旨在提高等离子喷涂过程的可靠性和可控性。提出的研究解决了缺乏可重复性的主要原因，即等离子炬中电弧的不受控制的动态行为。改进后的等离子炬可以在大规模制造和各种工业过程中得到重要应用，其中包括切割、焊接、等离子喷涂、萃取冶金、熔炼和化学合成。美国和法国的实验室已经开发出专门的诊断技术来研究等离子体过程。该提案利用了互补的专业知识和正在进行的实验努力。不同的诊断技术将用于不同几何形状的等离子炬。随后将在类似设计的火炬上进行后续实验。该项目将促进对等离子弧动态行为的理解，并将改进等离子喷涂设备的设计指南。＊＊＊

9415715 Heberlein This three-year award will support U.S.-France cooperative research in plasma-aided manufacturing between research groups at the University of Minnesota and the University of Limoges. The U.S. investigators are Joachim Heberlein and Emil Pfender and the French investigator is Pierre Fauchais. The objective of their research is to perform diagnostic experiments designed to improve the reliability and controllability of the plasma spray process. The proposed research addresses the major cause of the lack of reproducibility, namely the uncontrolled dynamic behavior of the arc in the plasma torch. An improved plasma torch could have important applications in large-scale manufacturing and a variety of industrial processes, among them cutting, welding, plasma spraying, extractive metallurgy, melting- refining, and chemical synthesis. The U.S. and French laboratories have developed specific diagnostic techniques for studying the plasma process. The proposal takes advantage complementary expertise and ongoing experimental efforts. Different diagnostic techniques will be used on plasma torches of different geometries. Subsequent experiments on torches of similar design will then be conducted. The project will advance understanding of the dynamic behavior of the plasma arc and will result in improved design guidelines for plasma spray equipment. ***