Adopting a dielectric-coated electrode configuration
the characteristics of streamer discharge in water with different conditions such as conductivity
ambient pressure
and voltage amplitude are investigated under pulse voltages. The experimental results demonstrate that water conductivity and applied voltage amplitude exert a great influence on mean velocity and brightness of the streamer discharge. When the ambient pressure decreases from 0.1 MPa to 0.006 5 MPa
the pressure affects slightly the mean velocities of the supersonic streamer in both distilled and tap water. Also
the 10% breakdown voltage(U
10
)is decreased by 20% in distilled water under the pressure of 0.006 5 MPa than that under the pressure of 0.1 MPa
while in tap water the U
10
is almost the same under different pressures. Based on the analysis of the discharge images and current waveforms
it can be concluded tha
t the streamer development in low conductivity water gets discrete and steps forward.
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references
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