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The corona discharge and audible noise in different polarities have different characteristics and rules. The experiment of sing point corona discharge under DC voltage was developed and the sound pressure produced by corona discharge was measured. The amplitude and pulse characteristics of needle-plane corona discharges were studied. The sound pressure in time domain was measured by capacitor microphone...
Plasma-induced advanced oxidation processes do not suffer from the drawbacks, such as carcinogenic byproducts, associated with conventional water treatment, and enable the removal of micro-pollutants [1]. The high oxidation strength of hydroxyl radicals enables degradation of resistant contaminants. Many reactions are known to occur at the plasma-water interface; however, the mechanisms of hydroxyl...
The magnitude distributions of filament current in dielectric barrier discharge were investigated under different supply voltage, barrier thickness and gap size. The experiment was carried out using two planar electrodes powered by 5 kHz and 2 kV power supply. One filament current could only affect a small space in the discharge gap. The number of filaments occurred depended on the rise rate of the...
Dielectric barrier discharges provide an effective method of industrial ozone generation. The process is usually driven by an ac power supply at a few hundred hertz, although attempts have been made to apply higher frequencies to increase the power density and ozone concentration. However, the population of low-energy electrons produced under continuous ac energization makes a large contribution to...
Power plants, internal combustion engines and other sources produce micron and sub-micron particles, which contaminate the air. This problem is faced mainly in large cities where both population and industrial activities are higher leading to significantly reduced air quality. Recent research has pointed out particles less than 2.5 μm in diameter (PM2.5) as a potential health hazard. In the light...
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