Velocity of initial propagation of positive nanosecond discharge in liquid water: dependence on high voltage amplitude and water conductivity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F19%3A00509789" target="_blank" >RIV/61389021:_____/19:00509789 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-6595/aae91f" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6595/aae91f</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6595/aae91f" target="_blank" >10.1088/1361-6595/aae91f</a>

Result language

angličtina

Original language name

Velocity of initial propagation of positive nanosecond discharge in liquid water: dependence on high voltage amplitude and water conductivity

Original language description

This study deals with the effect of water conductivity and high voltage pulse amplitude on the initial velocity of nanosecond discharge in liquid water. As variable parameters, we used water solutions with three different conductivities (2 mu S cm(-1), 100 mu S cm(-1), 500 mu S cm(-1)), and positive high voltage pulses with four different amplitudes (80 kV, 91 kV, 100 kV, 113 kV). The discharge reactor consists of metallic electrodes in a point-to-plane geometry, both immersed in liquid water. The discharge was generated by a commercial nanosecond pulse power generator with positive HV pulses of similar to 6 ns pulse duration (FWHM) and similar to 2.5 ns rise time. ICCD time-resolved imaging microscopy with high temporal resolution (similar to ns) was utilized as a suitable diagnostic tool for the discharge dynamic propagation. It can be concluded that the discharge visual characteristics and behaviour are not significantly influenced by water conductivity and the length of the filaments increases with the increasing voltage amplitude and reaches the maximum value of similar to 1.8 mm for 90 kV. The initial propagation velocity also depends on the voltage amplitude and increases with the voltage. The effect of water conductivity on the propagation velocity is negligible. As far as we know, this paper is the first to bring insight into the topic of the effect of water conductivity on the nanosecond discharge propagation in liquid water.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/GA15-12987S" target="_blank" >GA15-12987S: Plasma-liquid interactions in organic solutions induced by high-voltage electrical discharges</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Plasma Sources Science & Technology

ISSN

0963-0252

e-ISSN

—

Volume of the periodical

28

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

02LT02

UT code for WoS article

000459327900002

EID of the result in the Scopus database

2-s2.0-85065712534