The effect of methane gas flow rate on the streamer propagation in an atmospheric-pressure methane-air plasma jet

Atmospheric pressure capillary dielectric barrier oxygen discharge plasma jet is developed to generate nonthermal plasma using unipolar positive pulse power supply. Both electrical and optical diagnostic techniques were used to characterize the produced plasma as functions of applied voltage and gas flow rate. Electrical diagnostics indicated that the discharge frequency decreased with gas flow rate but increased with the applied voltage. Analytical results obtained from the optical emission spectroscopic data revealed the gas temperature, excitation temperature and electron density. Gas temperature was found to decrease with increasing oxygen flow rate but increase linearly with applied voltage. The produced plasma was applied preliminarily to study the inactivation yield of Fusarium oxysporum fungus infected potato samples.Journal of Bangladesh Academy of Sciences, Vol. 40, No. 1, 23-36, 2016

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Investigation on the Jet Stiffness Characteristics of a Novel Plasma Igniter

International Journal of Turbo and Jet Engines ◽

10.1515/tjj-2019-0036 ◽

2019 ◽

Vol 0 (0) ◽

Author(s):

Sibo Wang ◽

Jinlu Yu ◽

Jingfeng Ye ◽

Guohua Li ◽

Danqing Huang ◽

...

Keyword(s):

Flow Rate ◽

Gas Flow ◽

Plasma Jet ◽

Experimental Results ◽

Input Current ◽

Ignition Energy ◽

Air Plasma ◽

Gas Flow Rate ◽

Plasma Ignition ◽

Stiffness Characteristics

Abstract Plasma ignition technology is the research frontier in the field of energy and power. In this paper, a novel type of plasma jet igniter called pre-combustion plasma jet igniter is designed and the experimental results show that it has great potential in strengthening jet stiffness, improving ignition energy, decreasing ignition energy consumption and reducing igniter ablation. The value S called jet stiffness is defined for the first time to reflect the stiffness characteristics of the plasma jet. And the effects of jet gas flow rate, fuel-air ratio and input current on the jet stiffness are investigated experimentally. The experimental results show that the stiffness of the pre-combustion plasma jet is significantly stronger than that of the air plasma jet. When the total jet gas flow rate is increased from 16 L/min to 40 L/min, the stiffness of the air plasma jet and the pre-combustion plasma jet are increased by 73.3 % and 27.2 % respectively. When the current value reaches 30 A, the jet stiffness is increased by about 70 % compared to the input current of 20 A.

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Atmospheric Pressure Microwave Plasma Jet for Organic Thin Film Deposition

Polymers ◽

10.3390/polym12020354 ◽

2020 ◽

Vol 12 (2) ◽

pp. 354 ◽

Cited By ~ 3

Author(s):

Mehrnoush Narimisa ◽

František Krčma ◽

Yuliia Onyshchenko ◽

Zdenka Kozáková ◽

Rino Morent ◽

...

Keyword(s):

Flow Rate ◽

Atmospheric Pressure ◽

Gas Flow ◽

Microwave Plasma ◽

Plasma Jet ◽

Thin Film Deposition ◽

Film Deposition ◽

Organic Thin Film ◽

Gas Flow Rate ◽

Homogeneous Surface

In this work, the potential of a microwave (MW)-induced atmospheric pressure plasma jet (APPJ) in film deposition of styrene and methyl methacrylate (MMA) precursors is investigated. Plasma properties during the deposition and resultant coating characteristics are studied. Optical emission spectroscopy (OES) results indicate a higher degree of monomer dissociation in the APPJ with increasing power and a carrier gas flow rate of up to 250 standard cubic centimeters per minute (sccm). Computational fluid dynamic (CFD) simulations demonstrate non-uniform monomer distribution near the substrate and the dependency of the deposition area on the monomer-containing gas flow rate. A non-homogeneous surface morphology and topography of the deposited coatings is also observed using atomic force microscopy (AFM) and SEM. Coating chemical analysis and wettability are studied by XPS and water contact angle (WCA), respectively. A lower monomer flow rate was found to result in a higher C–O/C–C ratio and a higher wettability of the deposited coatings.

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Facile growth of centimeter-sized single-crystal graphene on copper foil at atmospheric pressure

Journal of Materials Chemistry C ◽

10.1039/c5tc00235d ◽

2015 ◽

Vol 3 (15) ◽

pp. 3530-3535 ◽

Cited By ~ 59

Author(s):

Jing Li ◽

Xuan-Yun Wang ◽

Xing-Rui Liu ◽

Zhi Jin ◽

Dong Wang ◽

...

Keyword(s):

Single Crystal ◽

Flow Rate ◽

Atmospheric Pressure ◽

Copper Foil ◽

Gas Flow ◽

Gas Flow Rate ◽

Single Crystalline ◽

Slowing Down ◽

Cu Foil

By mildly oxidizing Cu foil and slowing down the gas flow rate, centimeter-sized single-crystalline graphene was grown on Cu at atmospheric pressure.

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Studying of Plasma- Polymerized Pyrrole at Variable Gas Flow Rates Via Plasma Jet

Iraqi Journal of Physics (IJP) ◽

10.30723/ijp.v19i48.593 ◽

2021 ◽

Vol 19 (48) ◽

pp. 44-51

Author(s):

Saba Jawad Kadhem

Keyword(s):

Flow Rate ◽

Atmospheric Pressure ◽

Gas Flow ◽

Flow Characteristics ◽

Atmospheric Pressure Plasma ◽

Optical Emission ◽

Plasma Jet ◽

Nonequilibrium Plasma ◽

Nano Particles ◽

Vis Spectroscopy

In this manuscript has investigated the synthesis of plasma-polymerized pyrrole (C4H5N) nano-particles prepared by the proposed atmospheric pressure nonequilibrium plasma jet through the parametric studies, particularly gas flow rate (0.5, 1 and 1.5 L/min). The plasma jet which used operates with alternating voltage 7.5kv and frequency 28kHz. The plasma-flow characteristics were investigated based on optical emission spectroscopy (OES). UV-Vis spectroscopy was used to characterize the oxidization state for polypyrrole. The major absorption appears around 464.1, 449.7 and 435.3 nm at the three flow rate of argon gas. The chemical composition and structural properties of the contained samples which synthesized at 0.5 L/min as a argon flow rate were analyzed by scanning electron microscopy (SEM), Fourier transformation infrared spectroscopy (FTIR), Raman spectroscopy and X-ray diﬀraction (XRD). SEM point to a uniform distribution of polypyrrole (PPY) nanoparticles matrix. XRD technique showed a semicrystalline pattern for PPY)thin film. It is expected, that the high-quality plasma polymer grown by atmospheric pressure plasma jet method contributes to serving as conducting materials.

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