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Plasmas contain highly reactive radicals and free electrons, both of which are known to enhance the rates of a variety of chemical reactions. We are using this principle to explore the use of plasma streamers as a means for reforming organic liquids into hydrogen-rich gas. In this analysis, imaging studies of plasma streamers formed in liquids are presented. These studies aim to characterize plasma...
Secondary Reverse Streamer (SRS) was investigated in a natural ester transformer liquid under standard negative lightning impulse voltage. SRS represents a streamer that occurs well after the termination of the primary streamer (PS) propagation under a single lightning impulse, and it holds an opposite polarity to that of the PS and the impulse voltage. As an example when negative impulses are applied,...
This paper presents experimental studies on streamer and breakdown of synthetic and natural ester liquids with the presence of pressboard interface in a divergent point-plane field under lightning impulse voltage. Based on the current, light signals and streamer images, characteristics of both positive and negative streamers on pressboard surface were described, which resemble the features of streamers...
The propagation of point cathode-initiated streamers in cyclohexane with eight electronegative additives (electron scavengers) has been studied with fast impulses (<20 ns, <35 kV) applied to a 10 mm point-to-plane gap, using shadow graphic imaging and a differential charge-measurement technique. Due to a general random behavior of streamers, we could only separate effects from ldquostrongrdquo...
We have studied the spectral light from fast positive and negative streamers in five chlorocarbon liquids under pulsed divergent field conditions (30 kV). Atomic lines and C2 molecular Swan bands were observed, and with sufficient resolution to evaluate line and band-shapes. The characteristic broadening, shift and asymmetry of atomic lines varied significantly with the liquids, while differences...
Liquid insulation occupies a key position in the range of electrical insulating materials. We can conceive of a volume of empty space to which matter is added, molecule by molecule, until the vacuum is transformed, in stages through low pressure gas, high pressure gas, liquid of low viscosity, liquid of high viscosity, to an amorphous solid. First assumptions might be that as the phase changes then...
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