Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration
The results of investigations on electrodynamic characteristics of the pulsed barrierless discharge in the point-toplane electrode system in oxygen under the combined negative voltage application to the point-electrode are presented. It was shown that parameters of the combined voltage have signific...
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| Zitieren: | Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration / S.M. Mankovskyi, B.B. Kadolin, L.M. Zavada, V.I. Golota, M.O. Yegorov // Вопросы атомной науки и техники. — 2018. — № 4. — С. 168-171. — Бібліогр.: 4 назв. — англ. |
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irk-123456789-1473522019-02-15T01:25:06Z Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration Mankovskyi, S.M. Kadolin, B.B. Zavada, L.M. Golota, V.I. Yegorov, M.O. Плазменно-пучковый разряд, газовый разряд и плазмохимия The results of investigations on electrodynamic characteristics of the pulsed barrierless discharge in the point-toplane electrode system in oxygen under the combined negative voltage application to the point-electrode are presented. It was shown that parameters of the combined voltage have significant influence on conditions for the discharge ignition and, as a result, on efficiency of ozone synthesis in this discharge. Представлено результати досліджень електродинамічних характеристик імпульсного безбар'єрного розряду в системі електродів голка-площина в кисні при використанні комбінованого живлення з негативним потенціалом на голчатому електроді. Показано, що параметри живлення істотно впливають на умови запалювання розряду і, як наслідок, на ефективність синтезу озону в даному розряді. Представлены результаты исследований электродинамических характеристик импульсного безбарьерного разряда в системе электродов игла-плоскость в кислороде при использовании комбинированного питания с отрицательным потенциалом на игольчатом электроде. Показано, что параметры питания существенно влияют на условия зажигания разряда и, как следствие, на эффективность синтеза озона в данном разряде. 2018 Article Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration / S.M. Mankovskyi, B.B. Kadolin, L.M. Zavada, V.I. Golota, M.O. Yegorov // Вопросы атомной науки и техники. — 2018. — № 4. — С. 168-171. — Бібліогр.: 4 назв. — англ. 1562-6016 PACS: 52.75.−D, 52.77.−J, 52.80.HC, 52.90.+Z http://dspace.nbuv.gov.ua/handle/123456789/147352 en Вопросы атомной науки и техники Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Плазменно-пучковый разряд, газовый разряд и плазмохимия Плазменно-пучковый разряд, газовый разряд и плазмохимия |
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Плазменно-пучковый разряд, газовый разряд и плазмохимия Плазменно-пучковый разряд, газовый разряд и плазмохимия Mankovskyi, S.M. Kadolin, B.B. Zavada, L.M. Golota, V.I. Yegorov, M.O. Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration Вопросы атомной науки и техники |
| description |
The results of investigations on electrodynamic characteristics of the pulsed barrierless discharge in the point-toplane electrode system in oxygen under the combined negative voltage application to the point-electrode are presented. It was shown that parameters of the combined voltage have significant influence on conditions for the discharge ignition and, as a result, on efficiency of ozone synthesis in this discharge. |
| format |
Article |
| author |
Mankovskyi, S.M. Kadolin, B.B. Zavada, L.M. Golota, V.I. Yegorov, M.O. |
| author_facet |
Mankovskyi, S.M. Kadolin, B.B. Zavada, L.M. Golota, V.I. Yegorov, M.O. |
| author_sort |
Mankovskyi, S.M. |
| title |
Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration |
| title_short |
Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration |
| title_full |
Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration |
| title_fullStr |
Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration |
| title_full_unstemmed |
Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration |
| title_sort |
features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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2018 |
| topic_facet |
Плазменно-пучковый разряд, газовый разряд и плазмохимия |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/147352 |
| citation_txt |
Features of the microsecond pulsed discharge ignition in oxygen in a point-to-plane configuration / S.M. Mankovskyi, B.B. Kadolin, L.M. Zavada, V.I. Golota, M.O. Yegorov // Вопросы атомной науки и техники. — 2018. — № 4. — С. 168-171. — Бібліогр.: 4 назв. — англ. |
| series |
Вопросы атомной науки и техники |
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2025-07-11T02:16:34Z |
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| fulltext |
ISSN 1562-6016. ВАНТ. 2018. №4(116) 168
FEATURES OF THE MICROSECOND PULSED DISCHARGE IGNITION
IN OXYGEN IN A POINT-TO-PLANE CONFIGURATION
S.M. Mankovskyi, B.B. Kadolin, L.M. Zavada, V.I. Golota, M.O. Yegorov
National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine
E-mail: svyatoslav@kipt.kharkov.ua
The results of investigations on electrodynamic characteristics of the pulsed barrierless discharge in the point-to-
plane electrode system in oxygen under the combined negative voltage application to the point-electrode are pre-
sented. It was shown that parameters of the combined voltage have significant influence on conditions for the dis-
charge ignition and, as a result, on efficiency of ozone synthesis in this discharge.
PACS: 52.75.−D, 52.77.−J, 52.80.HC, 52.90.+Z
INTRODUCTION
Over the last decade, ozone technologies have been
widely used. However, the large-scale introduction of
ozone technologies is restricted due to a high cost and
operation complexity of the DBD ozone generators.
Therefore, the development of ozone generators which
are robust alternative to the regular DBD ozone genera-
tors is an actual task. The pulsed barrierless ozonizer
with a point-to-plane electrode system is one of the
promising directions of research [1]. According to [2],
high-efficient ozone synthesis (2.5 kW⋅h/g) was reached
for the pulsed corona discharge. Such result was ob-
tained due to the application of high-voltage nanosec-
ond pulses with a steep edge (less than 50 ns). These
high-voltage nanosecond pulses provided significant
overvoltage at the discharge gap and prevented the tran-
sition of discharge to a spark mode due to short pulse
duration. However, up-to-date power supply units gen-
erating such HV-pulses are low-efficient and emit the
high-level electromagnetic noise. This makes such pow-
er supply units inexpedient for the wide using in com-
mercial ozonizers. On the other hand, it was shown that
parameters of the first Trichell pulse significantly differ
from pulse parameters of the steady-state pulse se-
quence [3]. Characteristic time for setting the Trichell
pulse sequence is defined by the balance between the
processes of negative ion formation in the Trichell puls-
es and their neutralization on the anode in the intervals
between pulses. Therefore, it can be assumed that if the
plasma chemical reactor (PCR) is fed with the high-
voltage pulses of microsecond duration and high pulse
ratio, the discharge breakdown will occur every time
under the conditions of the first Trichel pulse, i.e. under
the most favorable conditions for ozone synthesis. The
high-voltage (up to 15 kV) high-efficiency power sup-
ply units, operating at the pulse repetition rate up to
20 kHz with pulse width of ~1 μs and efficiency factor
up to 80%, have already been developed and are widely
used. Therefore, the high-voltage microsecond pulses
can be successfully exploited in the PCRs for ozone
synthesis.
The goals of this article are: to study the electrody-
namic characteristics of the microsecond pulsed dis-
charge breakdown under the combined voltage applica-
tion to the point-to-plane electrode system in oxygen-air
gas mixture (93% О2); to study the influence of HV-
pulse repetition rate on the discharge breakdown voltage
and on the discharge transition to the sparkover; to
study the influence of low bias voltage on ozone synthe-
sis efficiency.
1. EXPERIMENTAL SETUP
The experiments were carried out on the experi-
mental setup that included: PCR-module, HV-pulse
generator, oxygen generator AirSep-20 with the produc-
tivity up to 0.5 m3/h, oil-less air compressor At-
las Copco LF 2-10 with the productivity of 11m3/h at
the pressure of 10 bars. Gas flow was measured by the
flowmeter RМ-0.25G. Output ozone concentration was
measured by the ozone analyzer Teledyne Instruments
454-H with an effective measuring range of
0…200 g/Nm3. Oxygen concentration was measured by
the magneto-dynamic oxygen analyzer PMA-10. The
HV-probe Tektronix P6015A with the bandwidth up to
75 MHz and current probe Tektronix СТ1 with the
bandwidth of 1.2 kHz…200 MHz were used to take
measurement of HV-pulse characteristics. Signals from
the probes were recorded by the 200 MHz oscilloscope
Tektronix TDS 2024B.
The HV-pulse generator provided negative gaussian-
shaped HV-pulses at resistive-capacitive load with the
following parameters: the amplitude is up to 12 kV,
pulse duration at the half-height is 0.7…1 μs, pulse rep-
etition rate is 0.1…15 kHz. Maximum power consump-
tion of the HV-pulse generator was 180 W with the effi-
ciency up to 70%. Typical oscillogram of the HV-pulse
at the reactive load is shown in Fig. 1.
Fig. 1. Typical oscillogram of the HV-pulse
Electrical diagram of the experimental setup is
shown in Fig. 2. The bias circuit provides on the dis-
charge gap the low negative DC bias voltage UDC up to
600 V at the inter-pulse periods. The bias circuit was
formed by the HV-capacitor C and the group of HV-
diodes D.
mailto:svyatoslav@kipt.kharkov.ua
ISSN 1562-6016. ВАНТ. 2018. №4(116) 169
Fig. 2. Electrical diagram of the experimental setup
The PCR-module consisted of two PCRs connected
in-parallel in the supply circuit and in-series along the
gas flow line. Each PCR was a point-to-plane electrode
system. Anode was a hollow stainless steel cylinder
(500 mm length, 38 mm inner diameter, 0.5 mm tube
wall thickness) with an inner cartridge made of graphite
foil ТМG-F/В2 (0.35 mm thickness). On the axis of the
cylinder there was a sectioned cathode with 43 star-like
cathode sections (26.5 mm diameter) separated by
10 mm bushings. Each cathode section had fifteen radial
equidistant cogs with 0.5×0.5 mm cross section. If there
is no discharge, the PCR is an air capacitor with the
capacitance of 55 pF. Oxygen enriched air mixture with
93% oxygen and –73°С dew point was used as plasma-
forming gas. Gas flow rate through the PCR module
was 2 LPM.
2. EXPERIMENTAL RESULTS
The dependence of electrodynamic characteristics of
the discharge and ozone synthesis efficiency on DC bias
voltage was studied. As a PCR is a resistive-capacitive
load with changing impedance, the HV-pulse amplitude
at the equivalent capacitive load was fixed as constant
for the whole range of the pulse repetition rate to match
the experimental results properly. During the experi-
ments, the oscillograms of voltage and current pulses
were recorded at the applied low negative DC bias volt-
age UDC = 0…600 V. The HV-pulse repetition rate was
varied within the range of f = 0.5…15 kHz. Readings of
output ozone concentration at all investigated values
UDC and f were gathered.
The oscillograms of voltage and current at the DC
bias voltage UDC = 500 V and pulse repetition rates
f = 0.5; 1; 3; 5; 9; 11; 13 and 15 kHz are shown in
Fig. 3.
There are specific distortions on the current and
voltage waveforms that related to the discharge break-
down and to the conduction current flowing. Specific
break on the leading edge of the HV-pulse or close to
the maximum corresponds to the discharge breakdown
voltage UB.
At HV-pulse repetition rate f up to 2.5 kHz, there are
a sharp break on the voltage waveform (at 10…11 kV)
and multiple pulsations in the current waveforms are
observed at the same time. These pulsations can be ex-
plained by non-simultaneous discharge ignition in the
different point-to-plane electrode cells along the mul-
tipoint electrode area.
As the pulse repetition rate f increases over 3 kHz,
the point of discharge ignition time becomes less no-
ticeable in the oscillograms, pulsations of the discharge
conduction current are merged and localized in time and
the discharge ignition occurs at lower voltage
(8…9 kV). If the pulse repetition rate f increases over
11 kHz, the discharge ignition and the discharge current
occur at increasingly higher voltage (10…11 kV).
At all other investigated values of DC bias voltage
except UDC=0 V, the discharge breakdown voltage UB
varied with the HV-pulse repetition rate f in similar
way.
It’s essential to note that the HV-pulse amplitude
could be reduced by up to 700 V due to the discharge
current flowing.
f = 0.5 kHz f = 1 kHz f = 3 kHz f = 5 kHz
f = 9 kHz f = 11 kHz f = 13 kHz f = 15 kHz
Fig. 3. Oscillograms of voltage (black) and current (grey) at the DC bias voltage UDC = 500 V
and HV-pulse repetition rates f = 0.5; 1; 3; 5; 9; 11; 13 and 15 kHz
ISSN 1562-6016. ВАНТ. 2018. №4(116) 170
The dependence of the discharge breakdown voltage
UB on the pulse repetition rate f for the given DC bias
voltage UDC = 0…600 V is shown in Fig. 4.
It should be noted that in case UDC = 0 V, the dis-
charge breakdown voltage does not depend significantly
on HV-pulse repetition rate f. If the applied DC bias
voltage UDC > 0 V, a “dip” on the dependence curve
occurs (see Fig. 4). This “dip” expands and shifts to
higher HV-pulse repetition rates f.
Together with oscillograms, values of the output
ozone concentration were recorded. To estimate the
efficiency of ozone synthesis in the discharge, ozone
mass m(O3) (g) per HV-pulse was determined as the
following:
f
QOn
Om
×
=
)(
)( 3
3
,
where n(O3) is the output ozone concentration (g/m3); Q
is the gas flow rate through the PCRs (m3/s); f is the
HV-pulse repetition rate (Hz).
The dependences of output ozone mass per HV-
pulse m(O3) on the HV-pulse repetition rate f for the
given DC bias voltage UDC = 0…600 V is presented in
Fig. 5. The analysis of dependences on Fig. 5 shows that
ozone mass per HV-pulse m(O3) monotonously decreas-
es as the HV-pulse repetition rate f increases at the DC
bias voltage UDC =0 V.
It can be assumed that such ozone synthesis reduc-
tion is related to the increase of ozone concentration in
the plasma-forming gas due to the increase in discharge
specific power with HV-pulse repetition rate f [4]. If the
applied DC bias voltage UDC is nonzero, the dependence
of ozone mass per HV-pulse m(O3) on the pulse repeti-
tion rate f has a nonmonotonic behavior. Moreover, for
each specified DC bias voltage UDC there is a certain
range of HV-pulse repetition rate f, where efficiency of
ozone synthesis is higher in comparison with the case
when UDC = 0 V. As a result, the increase of ozone out-
put concentration n(O3) from 32 to 45 g/Nm3 was ob-
tained at the DC bias voltage UDC = 500 V and the HV-
pulse repetition rate f = 15 kHz. At the same time, pow-
er consumption for this case increased only by 10%.
Comparison of the dependences in Figs. 4 and 5
suggests a correlation of ozone mass being produced per
HV-pulse m(O3) with the discharge breakdown voltage.
It is clearly shown that the “dips” in the curves for the
discharge breakdown voltage UB correspond to similar
“dips” in the curves for the dependence of ozone mass
per HV-pulse m(O3) on the HV-pulse repetition rate f.
Maximum ozone mass per HV-pulse m(O3) is produced
at the HV-pulse repetition rates f when the discharge
breakdown voltage goes out of the right side of the
“dip” to a quasi-constant level.
Fig. 4. The dependence of the discharge breakdown voltage UB on the HV-pulse repetition rate
for the DC bias voltage UDC = 0…600 V
Fig. 5. The dependence of output ozone mass per HV-pulse m(O3) on the HV-pulse repetition rate
for the DC bias voltage UDC = 0…600 V
Also, the dependence of the discharge breakdown
voltage UB for the HV-pulses with different amplitude
applied to the discharge gap at the given pulse repetition
rates f and DC bias voltage UDC was studied. It was
found that the discharge breakdown voltage UB for the
sub-microsecond pulses does not depend on the ampli-
UDC=0 V UDC=100 V UDC=200 V UDC=300 V
UDC=400 V UDC=500 V UDC=600 V
UDC=0 V UDC=100 V UDC=200 V UDC=300 V
UDC=400 V UDC=500 V UDC=600 V
ISSN 1562-6016. ВАНТ. 2018. №4(116) 171
tude of HV-pulses. At the same time, it should be noted
that the low negative DC bias voltage UDC prevents the
discharge transition to a spark mode and allows to sig-
nificantly extend the operating range for the HV-pulse
amplitude. It allows to apply more power to the dis-
charge and, therefore, to improve the output ozone
productivity of PCR.
CONCLUSIONS
The effect of application the DC bias voltage in in-
tervals between HV-pulses on characteristics of the bar-
rierless gas discharge in oxygen with a point-to-plane
electrode system has been studied. Bias voltage has an
effect on discharge formation conditions. This influ-
ences the discharge breakdown voltage and, as a result,
the plasma chemical processes in the discharge. It was
shown that there is an optimal bias voltage for efficient
ozone synthesis by the discharge. This optimal bias
voltage magnitude depends on the HV-pulse repetition
rate. Under the optimal both a bias voltage and a HV-
pulse repetition rate the output ozone concentration can
be increased by 20…40% with an increase in power
consumption up to 10%.
Other important effect of the combined voltage ap-
plication is the possibility to extend the HV-pulse am-
plitude range in which the discharge operates without
transition to a spark mode.
The research was partially supported by STCU pro-
ject #P658.
REFERENCES
1. V.I. Golota, B.B. Kadolin, V.I. Karas’,
I.A. Paschenko, S.G. Pugach and A.V. Yakovlev.
Ozone synthesis in atmospheric pressure needle-to-
plane gas discharge // Problems of Atomic Science
and Technology. Series “Plasma Electronics and
New Acceleration Methods”. 2000, № 4, p. 254-257.
2. S.V. Korobtsev, D.D. Medvedev, V.M. Shiryaevski.
Ozone generation in the impulse corona discharge in
the non dry air // 25 All Russian seminar “Ozone and
Other Ecologically Safe Oxidizes. Science and Tech-
nologies”. M.: “MSU”, June 5, 2003, p. 31-35.
3. Y.S. Akishev, M.E. Grushin, I.V. Kochetov,
A.P. Napartovich, N.I. Trushkin. An establishment
of regular Trichel pulses in a negative corona in air //
Plasma Phys. Rep. (11). 1999, № 25, p. 922-927.
4. V.I. Golota, L.M. Zavada, O.V. Kotyukov,
O.V. Poliakov, S.G. Pugach. Ozone synthesis effi-
ciency upgrading in the pulsed point-to-plane gas
discharge // Problems of Atomic Science and Tech-
nology. Series “Plasma Electronics and New Accel-
eration Methods”. 2006, № 5, p. 91-94.
Article received 05.06.2018
ОСОБЕННОСТИ ЗАЖИГАНИЯ МИКРОСЕКУНДНОГО ИМПУЛЬСНОГО РАЗРЯДА
В КИСЛОРОДЕ В СИСТЕМЕ ИГЛА-ПЛОСКОСТЬ
С.Н. Маньковский, Б.Б. Кадолин, Л.М. Завада, В.И. Голота, М.А. Егоров
Представлены результаты исследований электродинамических характеристик импульсного безбарьерно-
го разряда в системе электродов игла-плоскость в кислороде при использовании комбинированного питания
с отрицательным потенциалом на игольчатом электроде. Показано, что параметры питания существенно
влияют на условия зажигания разряда и, как следствие, на эффективность синтеза озона в данном разряде.
ОСОБЛИВОСТІ ЗАПАЛЮВАННЯ МІКРОСЕКУНДНОГО ІМПУЛЬСНОГО РОЗРЯДУ
В КИСНІ В СИСТЕМІ ГОЛКА-ПЛОЩИНА
С.М. Маньковський, Б.Б. Кадолін, Л.М. Завада, В.І. Голота, М.О. Єгоров
Представлено результати досліджень електродинамічних характеристик імпульсного безбар'єрного роз-
ряду в системі електродів голка-площина в кисні при використанні комбінованого живлення з негативним
потенціалом на голчатому електроді. Показано, що параметри живлення істотно впливають на умови запа-
лювання розряду і, як наслідок, на ефективність синтезу озону в даному розряді.
Особенности зажигания микросекундного импульсного разряда в кислороде в системе игла-плоскость
Особливості запалювання мікросекундного імпульсного розряду В кисні в системі голка-площина
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