VORÁČ, Jan, Lucia POTOČŇÁKOVÁ, Petr SYNEK, Jaroslav HNILICA and Vít KUDRLE. Gas mixing enhanced by power modulations in atmospheric pressure microwave plasma jet. Plasma Sources Science and Technology. Bristol: IOP Pub., vol. 25, No 2, p. "nestrankovano", 15 pp. ISSN 0963-0252. 2016.
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Basic information
Original name Gas mixing enhanced by power modulations in atmospheric pressure microwave plasma jet
Authors VORÁČ, Jan (203 Czech Republic, guarantor, belonging to the institution), Lucia POTOČŇÁKOVÁ (703 Slovakia, belonging to the institution), Petr SYNEK (203 Czech Republic, belonging to the institution), Jaroslav HNILICA (203 Czech Republic, belonging to the institution) and Vít KUDRLE (203 Czech Republic, belonging to the institution).
Edition Plasma Sources Science and Technology, Bristol, IOP Pub. 2016, 0963-0252.
Other information
Original language English
Type of outcome Article in a journal
Field of Study Plasma physics and discharge through gases
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/00216224:14310/16:00087599
Organization Přírodovědecká fakulta – Repository – Repository
UT WoS 000372337900020
Keywords in English microwave plasma; atmospheric pressure; plasma jet; gas mixing; vortex
Links ED1.1.00/02.0068, research and development project. ED2.1.00/03.0086, research and development project. EE2.3.30.0009, research and development project. LO1411, research and development project. TE02000011, research and development project.
Changed by Changed by: RNDr. Daniel Jakubík, učo 139797. Changed: 2/9/2020 19:25.
Abstract
Microwave plasma jet operating in atmospheric pressure argon was power modulated by audio frequency sine envelope in the 10^2 W power range. Its effluent was imaged using interference filters and ICCD camera for several different phases of the modulating signal. The combination of this fast imaging with spatially resolved optical emission spectroscopy provides useful insights into the plasmachemical processes involved. Phase-resolved schlieren photography was performed to visualize the gas dynamics. The results show that for higher modulation frequencies the plasma chemistry is strongly influenced by formation of transient flow perturbation resembling a vortex during each period. The perturbation formation and speed are strongly influenced by the frequency and power variations while they depend only weakly on the working gas flow rate. From application point of view, the perturbation presence significantly broadened lateral distribution of active species, effectively increasing cross-sectional area suitable for applications.
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