Fast Modeling of Phase Changes in a Particle Injected Within a d.c Plasma Jet

摘要：

When spraying ceramic particles with a low thermal conductivity such as zirconia using Ar-H2 direct-current (d.c.) plasma jets where the heat transfer is important, heat propagation phenomena take place with the propagation melting, evaporation or even solidification fronts. Most models neglect these heat propagation phenomena assuming the particle as a lumped media. This work is aimed at developing a model coupling the effect of heat propagation with the particle dynamic within plasma jets. It uses an adaptative grid in which the coordinates of the phase change fronts are fixed. It allows minimizing the calculation costs (approximately 10 seconds on PC under windows XP against 1hour with an enthalpy model). Such calculations are illustrated for dense and porous agglomerated zirconia as well as iron particles which evaporation in an Ar- H2 (25 vol ％) plasma is important.

作者: F. Ben Ettouil B. Pateyron H, Ageorges M. El Ganaoui P. Fauchais O. Mazhorova

作者单位: University of Limoges, SPCTS, Limoges, France Keldysh Institute of Applied Mathematics, Moscow, Russia

会议类型: 国际会议

会议名称: 2007国际热喷涂大会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-05-14（万方平台首次上网日期，不代表论文的发表时间）