Release Time:2019-03-09  Hits:

Indexed by: Journal Papers

Date of Publication: 2016-01-01

Journal: CHINESE PHYSICS B

Included Journals: Scopus、ISTIC、EI、SCIE

Volume: 25

Issue: 1

ISSN: 1674-1056

Key Words: atmospheric pressure plasma jet; OH radicals; plasma simulation

Abstract: A numerical study of the effect of water content on OH production in a pulsed-dc atmospheric pressure helium-air plasma jet is presented. The generation and loss mechanisms of the OH radicals in a positive half-cycle of the applied voltage are studied and discussed. It is found that the peak OH density increases with water content in air (varying from 0% to 1%) and reaches 6.3 x 10(18) m(-3) when the water content is 1%. Besides, as the water content increases from 0.01% to 1%, the space-averaged reaction rate of three-body recombination increases dramatically and is comparable to those of main OH generation reactions.