Study of generation characteristics of glow-type atmospheric-pressure plasma jet based on DC discharge in air

Liu, Wenzheng; Zheng, Qingtian; Hu, Mingchao

doi:10.1088/2058-6272/ab4160

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…Data are also available on how this type of discharge near a negative electrode is transformed and constricted [4] . Positive coronas can produce cylindrical jets [7] whose length increases greatly if an additional ring electrode is present in their region [22] . The threshold current for corona-to-glow and glow-to-spark transitions can vary with the geometry of an anode, its resistivity, length of gap, and gas flow [3] .…”

mentioning

confidence: 99%

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Corona with Streamers in Atmospheric Pressure Air in a Highly Inhomogeneous Electric Field

Тарасенко

Бакшт

Kuznetsov

et al. 2020

j. of atmos. sci. res.

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The paper presents research data on positive and negative coronas in atmospheric pressure air in a highly inhomogeneous electric field. The data show that irrespective of the polarity of pointed electrodes placed in a high electric field (>200 kV/cm), this type of discharge develops via spherical streamers even if the gap voltage rises slowly (£0.2 kV/ms). The start voltage of first positive streamers, compared to negative ones, is higher and the amplitude and the frequency of their current pulses are much lower: about two times and more than two orders of magnitude, respectively. The higher frequency of current pulses from negative spherical streamers provides higher average currents and larger luminous regions of negative coronas compared to positive ones. Positive and negative cylindrical streamers from a pointed to a plane electrode are detected and successive discharge transitions at both polarities are identified.

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mentioning

confidence: 99%

“…Despite abundant research data on corona discharges, their studies are continued [17][18][19][20][21][22][23][24][25]30] . In particular, some features of coronas remain unclear.…”

mentioning

confidence: 99%

Corona with Streamers in Atmospheric Pressure Air in a Highly Inhomogeneous Electric Field

Тарасенко

Бакшт

Kuznetsov

et al. 2020

j. of atmos. sci. res.

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show abstract

“…Therefore, distinguishing and monitoring the different types of discharge modes is a key issue in different applications. During discharge, electric, optical, electromagnetic, and acoustic signals are always produced [16][17][18][19]. The current methods used to classify discharge modes are usually based on these signal characteristics of plasma.…”

Section: Introductionmentioning

confidence: 99%

Classification of DC discharge modes based on acoustic signal

Xiong¹,

Wang²,

Li³

2022

Phys. Scr.

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Gas discharge will produce rich electromagnetic, optical as well as acoustic signals. Compared with the other signals, acoustic signals are also significant and would offer non-contact, low cost and easy-operation approach for online discharging monitoring, which require more attention and intensive study. In this paper, we studied the characteristics of acoustic signals in the corona, transient glow, spark, and glow discharging modes generated in a DC pin-to-pin configuration and developed a method using acoustic signals to classify the different discharge modes. The acoustic signals of the discharge at different gaps were recorded by adjusting the gap distance. 250 sets of acoustic signal samples were collected for each discharging mode. It was found that acoustic signals behave differently in different modes. Based on the short-time Fourier transform (STFT) of the acoustic signals, a novel method for discharge mode classification using the support vector machine (SVM) approach was developed. The final predictive accuracy of the trained classifier exceeds 90%.

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A review of low-temperature plasma-assisted machining: from mechanism to application

et al. 2023

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Materials with high hardness, strength or plasticity have been widely used in the fields of aviation, aerospace, and military, among others. However, the poor machinability of these materials leads to large cutting forces, high cutting temperatures, serious tool wear, and chip adhesion, which affect machining quality. Low-temperature plasma contains a variety of active particles and can effectively adjust material properties, including hardness, strength, ductility, and wettability, significantly improving material machinability. In this paper, we first discuss the mechanisms and applications of low-temperature plasma-assisted machining. After introducing the characteristics, classifications, and action mechanisms of the low-temperature plasma, we describe the effects of the low-temperature plasma on different machining processes of various difficult-to-cut materials. The low-temperature plasma can be classified as hot plasma and cold plasma according to the different equilibrium states. Hot plasma improves material machinability via the thermal softening effect induced by the high temperature, whereas the main mechanisms of the cold plasma can be summarized as chemical reactions to reduce material hardness, the hydrophilization effect to improve surface wettability, and the Rehbinder effect to promote fracture. In addition, hybrid machining methods combining the merits of the low-temperature plasma and other energy fields like ultrasonic vibration, liquid nitrogen, and minimum quantity lubrication are also described and analyzed. Finally, the promising development trends of low-temperature plasma-assisted machining are presented, which include more precise control of the heat-affected zone in hot plasma-assisted machining, cold plasma-assisted polishing of metal materials, and further investigations on the reaction mechanisms between the cold plasma and other materials.

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Study of generation characteristics of glow-type atmospheric-pressure plasma jet based on DC discharge in air

Cited by 8 publications

References 30 publications

Corona with Streamers in Atmospheric Pressure Air in a Highly Inhomogeneous Electric Field

Corona with Streamers in Atmospheric Pressure Air in a Highly Inhomogeneous Electric Field

Classification of DC discharge modes based on acoustic signal

A review of low-temperature plasma-assisted machining: from mechanism to application

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