DIFFUSION OF ATOMIC-HYDROGEN IN AN ATMOSPHERIC-PRESSURE FREE-BURNING ARC-DISCHARGE

被引：42
|
作者：
SNYDER, SC
MURPHY, AB
HOFELDT, DL
REYNOLDS, LD
机构：
[1] CSIRO,DIV APPL PHYS,SYDNEY,NSW 2070,AUSTRALIA
[2] UNIV MINNESOTA,DEPT ENGN MECH,MINNEAPOLIS,MN 55455
来源：
PHYSICAL REVIEW E | 1995年 / 52卷 / 03期
关键词：
D O I：
10.1103/PhysRevE.52.2999
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Relative radial concentration profiles of atomic hydrogen in an atmospheric-pressure argon-hydrogen free-burning 200-A are discharge were measured using laser-induced fluorescence by two-photon excitation of the ground state of atomic hydrogen. Radial profiles are presented for three axial locations. A comparison between the measured profiles and profiles calculated using a diffusion model that considers demixing processes is made. The measured profiles decrease less rapidly with increasing radius than the calculated profiles, suggesting, in agreement with calculations, that the diffusion rate of atomic hydrogen is greater than the recombination rate. Consequently, local chemical equilibrium is not maintained at larger radii in the arc.
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页码：2999 / 3009
页数：11
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