The secondary discharge supported by microdischarge in vortex flow
This research studies the DC microdischarges properties in the air vortex flow. The electrical parameters of the discharge and optical characteristics of the microdischarge plasma jet have been studied. The electronic excitation temperatures has been determined by Boltzmann plots using oxygen atom m...
Збережено в:
| Опубліковано в: : | Вопросы атомной науки и техники |
|---|---|
| Дата: | 2014 |
| Автори: | , , , , , , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2014
|
| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/81962 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | The secondary discharge supported by microdischarge in vortex flow / Ok.V. Solomenko, V.V. Lendiel, V.Ya. Chernyak, D.O. Kalustova, V.V. Iukhymenko, E.V. Martysh, I.V. Prysiazhnevych, V.O. Shapoval // Вопросы атомной науки и техники. — 2014. — № 6. — С. 241-244. — Бібліогр.: 6 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860241673771024384 |
|---|---|
| author | Solomenko, Ok.V. Lendiel, V.V. Chernyak, V.Ya. Kalustova, D.O. Iukhymenko, V.V. Martysh, E.V. Prysiazhnevych, I.V. Shapoval, V.O. |
| author_facet | Solomenko, Ok.V. Lendiel, V.V. Chernyak, V.Ya. Kalustova, D.O. Iukhymenko, V.V. Martysh, E.V. Prysiazhnevych, I.V. Shapoval, V.O. |
| citation_txt | The secondary discharge supported by microdischarge in vortex flow / Ok.V. Solomenko, V.V. Lendiel, V.Ya. Chernyak, D.O. Kalustova, V.V. Iukhymenko, E.V. Martysh, I.V. Prysiazhnevych, V.O. Shapoval // Вопросы атомной науки и техники. — 2014. — № 6. — С. 241-244. — Бібліогр.: 6 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | This research studies the DC microdischarges properties in the air vortex flow. The electrical parameters of the discharge and optical characteristics of the microdischarge plasma jet have been studied. The electronic excitation temperatures has been determined by Boltzmann plots using oxygen atom multiplets (777, 844, 926 nm). Also, there are the molecular bands of NO, OH, and N₂ (B-A) and N₂ (C-B) in the microdischarge plasma spectrum. The vibrational and rotational excitation temperatures have been determined.
Исследованы свойства микроразрядов постоянного тока в вихревом потоке воздуха, а также электрические параметры этого разряда и оптические характеристики плазменного факела микроразряда. Температуру заселения возбужденных электронных уровней определяли с помощью диаграмм Больцмана, используя мультиплеты атома кислорода (777, 844, 926 нм). В спектре плазмы микроразряда присутствуют молекулярные полосы NO, OH, N₂ (В-А) и N₂ (С-В). Определены температуры заселения колебательных и вращательных уровней.
Дослідженню властивості мікророзрядів постійного струму у вихровому потоці повітря, а також електричні параметри цього розряду та оптичні характеристики плазмового факелу мікророзряду. Температура заселення збуджених електронних рівнів визначалася за допомогою діаграм Больцмана, з використанням мультиплетів атома кисню (777, 844, 926 нм). У спектрі плазми мікророзряду присутні молекулярні смуги NO, OH, N₂ (В-А) і N₂ (С-В). Визначені температури заселення коливальних та обертальних рівнів.
|
| first_indexed | 2025-12-07T18:30:33Z |
| format | Article |
| fulltext |
ISSN 1562-6016. ВАНТ. 2014. №6(94)
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2014, №6. Series: Plasma Physics (20), p. 241-244. 241
THE SECONDARY DISCHARGE SUPPORTED BY MICRODISCHARGE
IN VORTEX FLOW
Ok.V. Solomenko, V.V. Lendiel, V.Ya. Chernyak, D.O. Kalustova, V.V. Iukhymenko,
E.V. Martysh, I.V. Prysiazhnevych, V.O. Shapoval
Taras Shevchenko National University of Kyiv, Ukraine
E-mail: chernyak_v@ukr.net; oksana_solomenko@ukr.net
This research studies the DC microdischarges properties in the air vortex flow. The electrical parameters of the
discharge and optical characteristics of the microdischarge plasma jet have been studied. The electronic excitation
temperatures has been determined by Boltzmann plots using oxygen atom multiplets (777, 844, 926 nm). Also, there
are the molecular bands of NO, OH, and N2 (B-A) and N2 (C-B) in the microdischarge plasma spectrum. The
vibrational and rotational excitation temperatures have been determined.
PACS: 52.50.Dg; 52.80.-s
INTRODUCTION
Plasma generators of non-equilibrium atmospheric
pressure plasma attract the most attention from a wide
group of experts from various areas. This is due to the
possibility of technological applications of such plasma
sources and disclosure of fundamental questions
regarding the mechanisms of plasma interaction with
living organisms (Plasma medicine).
Atmospheric pressure plasma has a wide range of
applications in industries ranging from electronics to
medicine. Promising task is to obtain nanomaterials
without bulky expensive equipment. This problem can
be solved by using non-equilibrium atmospheric
pressure plasma, which can be obtained by using
various categories such as barrier discharge [1], corona
discharge [2], etc. But among the existing types of
discharges greatest interest is microdischarges because
it is a non-equilibrium plasma generator, similar to the
plasma glow discharge low pressure [3]. It has a small
size and does not require a high power. Also, unlike
corona discharge, in this discharge gas stream may be
directly involved in the discharge (through a tubular
electrode) that promotes the synthesis and processing of
nanomaterials [4, 5]. In addition, various gas mixtures
can be used to generate the microplasma jets.
Virtually unexplored the secondary discharges
which supported by plasma of microdischarges. It is
known [6] that the secondary discharge provides the
ability to create potential leaping near the electrode of
the secondary discharge. This can lead to the
empowerment of an applications number of
microdischarge plasma.
This work is devoted to the researching of electrical
properties of DC microdischarge in the vortex air flow
that generated plasma jet with radius ~ 1 mm in
atmospheric pressure area. In this work examine two
cases: 1–there are no electric field in outlet area; 2–there
is specially created constant electric field. The last case
corresponds to the secondary microdischarge, which is
supported by the microdischarge plasma jet.
1. EXPERIMENTAL SETUP
The scheme of the experimental setup that was used
in researches of microdischarge jet is shown in Fig. 1.
І
Iu
Ru
Rbal
G
U1
U2
Fig. 1. The electrical scheme of generating of the
microdischarge jet
The generator of the microdischarge jet was the
axially symmetric system. The copper electrodes (the
high voltage electrode with a diameter of 6 mm and an
output electrode with a thickness of 1 mm) were located
at a distance of 1 mm. The high voltage electrode has
cylindrical form with cone-shaped ending. The height of
cone-shaped ending was 8 mm and the radius of
curvature ~0.5 mm. Both electrodes were water-cooled.
Air was used as working gas and it was injected
tangential to the device lateral surface.
mailto:chernyak_v@ukr.net
242 ISSN 1562-6016. ВАНТ. 2014. №6(94)
2. RESULTS AND DISCUSSION
In this study, the current-voltage characteristics
(CVC) measurements of self-microdischarge were
performed for different air flows (G = 1…3 l / min) and
for different output diameters (from which
microdischarge jet was blown out): d = 0.5 mm or
d = 1.7 mm. The output (external) electrode of the
design was grounded.
Fig. 2. CVC of the microdischarge that measured for
the constructions d = 0.5 mm and d = 1.7 mm
It should be noted that increasing of outlet diameter
(d) in output electrode leads to contraction of
microplasma jet. Its form is similar to the rotating
gliding discharge. The measuring results of CVC are
demonstrated in Fig. 2. The measuring results of CVC
with the positive potential of the high voltage electrode
are presented in Fig. 2,a. The gas flows are the same
under different outlet diameters and correspond to
G = 1 l / min. In Fig. 2,b the negative potential of the
high voltage electrode and the gas flows in the system
was varied: in case of d = 0.5 mm air flow corresponds
to G = 1 l/min; for d = 1.7 mm – G = 3 l/min. The
extreme points on the ordinates axis correspond to the
breakdown voltage.
As it can be seen from Fig. 2, the CVC has
monotone character and does not depend on the plasma
jet outlet diameter d. The form of the CVC reminds
transition from Townsend dark discharge (at low
currents) to normal glowing discharge (started from
~ 10 mA or more). This transition is crossing through
subnormal glowing discharge. It was found that
compared with d = 0.5 mm increasing of d leads to
higher voltages of the microdischarge burning.
The secondary microdischarge (SMD) generation
was supported by the microplasma flow. The nickel
plate (diameter of 10 mm and a thickness of 0.1 mm)
served as an electrode of the secondary discharge during
the SMD generation. Measurements were performed for
different distances between the electrode of the
secondary discharge and the surface of the output
electrode of the self-microdischarge.
The parameters of the self-microdischarge circuit are
remained unchanged. Measurements were carried out in
the air flow G = 1 l / min. The results of the
measurement for CVC of SMD for d = 0.5 mm with the
positive potential of the high voltage electrode are
presented in Fig. 3. The CVC of the SMD has a view
similar to the probe characteristics.
Fig. 3. CVC of the secondary microdischarge (SMD)
for different distances between the secondary electrode
and the surface of the output electrode at the
d = 0.5 mm; the self-microdischarge had I = 20 mA
The measurements of the SMD plasma jet emission
were performed perpendicular to its axis on the distance
1…2 mm from the output electrode surface. Distance
between the plasma jet and inlet of the quartz optical
fiber was about 12…13 mm. Also measurements were
carried out at distance of 2.5 mm between the secondary
electrode and the surface of the output electrode.
One can in Fig. 3 a saturation regions can be
observed on the current-voltage characteristics of the
secondary discharge for any potential of the electrode of
the secondary discharge. The magnitude of the
saturation current significantly depends on the polarity
of the voltage on the electrode of the secondary
discharge. In case of positive potential of the high
voltage electrode the saturation current of the secondary
discharge with the negative polarity is much higher than
in the positive polarity. In case of negative potential of
the high voltage electrode the saturation current of the
secondary discharge is much higher at the positive
polarity. The direction of the secondary discharge
current at the higher saturation of the current coincides
with the direction of the self-microdischarge current.
ISSN 1562-6016. ВАНТ. 2014. №6(94) 243
It was found that emission spectra of the plasma jet
and emission spectra of the SMD at E = 0 (no secondary
Ni electrode) and E ≠ 0 (SMD) are almost identical. The
measurements of the microplasma emission spectrum
was carried out at discharge currents I = 30 mA
(Fig. 4,a) and I = 8.5 mA (Fig. 4,b). These two regimes
correspond to normal glowing discharge and subnormal
glowing discharge respectively.
Optical emission spectroscopy of generated plasma
jet was made by CCD-based spectrometer Solar TII in
the wavelength range of 200…1100 nm with spectral
resolution ~ 0.2 nm. Emission spectra of the
microplasma showed the presence of atomic oxygen
multiplets (777, 844 and 926 nm) and molecular bands
of NO, OH, N2 (B-A) and N2 (C-B) and also N2
+
.
Fig. 4. Comparison of the experimental emission
spectra (black) with simulation spectra of N2 (C-B)
created in Specair code. Discharge current І = 30 мА
(а) and І= 8.5 мА (b)
The temperature of excited vibrational (Tv
*
) and
rotational (Tr
*
) levels of N2 and OH molecules were
determinated by comparing the experimental spectra
with spectra simulation in Specair code. In case of
I = 30 mA, when d = 1.7 mm, the temperatures of N2
and OH molecules: Tr
*
(N2) = Tr
*
(OH) = 2500 ± 500 K:
Tv
*
(N2) = Tv
*
(OH) = 3500 ± 500 K (see Fig. 4,а). In
case of a discharge current of 8.5 mA (for the same
outlet diameter) the temperatures of N2 and OH were
(Fig. 4,b):Tr
*
(N2) = 1500 ± 500 K,Tv
*
(N2) = 3500 ± 500
K and Tr
*
(OH) = 2000 ± 500 K, Tv
*
(OH) = 3500 ± 500 K.
Temperature of excited electronic population levels
(Te
*
) was determined for the case of I = 30 mA, when
d = 1.7 mm. The oxygen Te
*
(O) has been defined by the
Boltzmann plots method. The three most intense
multiplets (777.2, 844, 926 nm) are used in this method.
Also Te
*
was determined from the first
(N2 (B-A)) and second (N2 (С-В)) positive systems of
nitrogen radiation intensities ratio. Temperatures among
themselves varied greatly, namely: Te
*
(O) = 4500 K,
Te
*
(N2) = 9000 ± 1000 K.
Also in case of I = 30 mA, when d = 1.7 mm using
determined temperatures it was created the simulated
spectrum of the microplasma. It is represented in Fig. 5.
Fig. 5 Comparison of experimental (black) spectrum of
microplasma and simulated (gray) spectrum at
temperatures: Tr
*
(N2) = 2500 K, Tv
*
(N2) = 3500 K and
Te
*
(N2) = 9000 K
CONCLUSIONS
Thus, it was found that:
• in case of the microplasma jet, which is blown out
from the hole, its diameter affects significantly on the
plasma jet shape;
• the transition through the zero at current-voltage
characteristic of the secondary discharge depends on the
distance between the surface of the output electrode and
the electrode of the secondary discharge;
• a saturation regions can be observed on the
current-voltage characteristics of the secondary
discharge for any potential of the electrode of the
secondary discharge. The magnitude of the saturation
current significantly depends on the polarity of the
voltage on the electrode of the secondary discharge. In
case of positive potential of the high voltage electrode
the saturation current of the secondary discharge with
the negative polarity is much higher than in the positive
polarity. In case of negative potential of the high voltage
electrode the saturation current of the secondary
discharge is much higher at the positive polarity. The
direction of the secondary discharge current at the
higher saturation of the current coincides with the
direction of the self-microdischarge current;
• emission spectra of the plasma jet and emission
spectra of the secondary microdischarge at E = 0
(no secondary electrode) and E ≠ 0 (the secondary
microdischarge) are almost identical;
244 ISSN 1562-6016. ВАНТ. 2014. №6(94)
• the temperatures Tv
*
and Tr
*
were determined from
N2 (C-B) and OH (A-X) bands at hole diameter
d = 1.7 mm. They are similar in values.
REFERENCES
1. D. Lanbo, Z. Xiuling, X. Zhijian. Preparation of
copper nanoparticles using dielectric barrier discharge at
atmospheric pressure and its mechanism// Plasma
Science and Technology. 2014, № 1, p. 41-44.
2. S.N. Abolmasov, L. Kroely, et al. Negative corona
discharge: application to nanoparticle detection in rf
reactors// Plasma Sources Sci. Technol. 2009, p. 6.
3. K.H. Becker, U. Kogelschatz, et al. Non-equilibrium
air plasma at atmospheric pressure // Institute of Physics
Publishing, Bristol and Philadelphia. 2005.
4. R.M. Sankaran, D. Holunga, et al. Synthesis of blue
luminescent Si nanoparticles using atmospheric-
pressure microdischarges // NANO LETTERS (5). 2005,
№ 3, p. 537-541.
5. W.-H. Chiang, R.M. Sankaran. Microplasma
synthesis of metal nanoparticles for gas-phase studies of
catalyzed carbon nanotube growth // Applied Physics
Letters (91). 2007.
6. V. Prysiazhnevych, V.Ya. Chernyak, et al. Optical
and probe diagnostics of plasma-liquid systems with
secondary discharge // Problems of Atomic Science and
Technology. 2007, p. 212-215.
Article received 21.09.2014
ВТОРИЧНЫЙ РАЗРЯД, ПОДДЕРЖИВАЕМЫЙ МИКРОРАЗРЯДОМ В ВИХРЕВОМ ПОТОКЕ
Ок.В. Соломенко, В.В. Лендьел, В.Я. Черняк, Д.О. Калустова, В.В. Юхименко, Е.В. Мартыш,
И.В. Присяжневич, В.О. Шаповал
Исследованы свойства микроразрядов постоянного тока в вихревом потоке воздуха, а также
электрические параметры этого разряда и оптические характеристики плазменного факела микроразряда.
Температуру заселения возбужденных электронных уровней определяли с помощью диаграмм Больцмана,
используя мультиплеты атома кислорода (777, 844, 926 нм). В спектре плазмы микроразряда присутствуют
молекулярные полосы NO, OH, N2 (В-А) и N2 (С-В). Определены температуры заселения колебательных и
вращательных уровней.
ВТОРИННИЙ РОЗРЯД, ЩО ПІДТРИМУЄТЬСЯ МІКРОРОЗРЯДОМ У ВИХРОВОМУ ПОТОЦІ
Ок.В. Соломенко, В.В. Ленд′єл, В.Я. Черняк, Д.О. Калустова, В.В. Юхименко, Є.В. Мартиш,
І.В. Присяжневич, В.О. Шаповал
Дослідженню властивості мікророзрядів постійного струму у вихровому потоці повітря, а також
електричні параметри цього розряду та оптичні характеристики плазмового факелу мікророзряду.
Температура заселення збуджених електронних рівнів визначалася за допомогою діаграм Больцмана, з
використанням мультиплетів атома кисню (777, 844, 926 нм). У спектрі плазми мікророзряду присутні
молекулярні смуги NO, OH, N2 (В-А) і N2 (С-В). Визначені температури заселення коливальних та
обертальних рівнів.
|
| id | nasplib_isofts_kiev_ua-123456789-81962 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T18:30:33Z |
| publishDate | 2014 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Solomenko, Ok.V. Lendiel, V.V. Chernyak, V.Ya. Kalustova, D.O. Iukhymenko, V.V. Martysh, E.V. Prysiazhnevych, I.V. Shapoval, V.O. 2015-05-22T20:05:57Z 2015-05-22T20:05:57Z 2014 The secondary discharge supported by microdischarge in vortex flow / Ok.V. Solomenko, V.V. Lendiel, V.Ya. Chernyak, D.O. Kalustova, V.V. Iukhymenko, E.V. Martysh, I.V. Prysiazhnevych, V.O. Shapoval // Вопросы атомной науки и техники. — 2014. — № 6. — С. 241-244. — Бібліогр.: 6 назв. — англ. 1562-6016 PACS: 52.50.Dg; 52.80.-s https://nasplib.isofts.kiev.ua/handle/123456789/81962 This research studies the DC microdischarges properties in the air vortex flow. The electrical parameters of the discharge and optical characteristics of the microdischarge plasma jet have been studied. The electronic excitation temperatures has been determined by Boltzmann plots using oxygen atom multiplets (777, 844, 926 nm). Also, there are the molecular bands of NO, OH, and N₂ (B-A) and N₂ (C-B) in the microdischarge plasma spectrum. The vibrational and rotational excitation temperatures have been determined. Исследованы свойства микроразрядов постоянного тока в вихревом потоке воздуха, а также электрические параметры этого разряда и оптические характеристики плазменного факела микроразряда. Температуру заселения возбужденных электронных уровней определяли с помощью диаграмм Больцмана, используя мультиплеты атома кислорода (777, 844, 926 нм). В спектре плазмы микроразряда присутствуют молекулярные полосы NO, OH, N₂ (В-А) и N₂ (С-В). Определены температуры заселения колебательных и вращательных уровней. Дослідженню властивості мікророзрядів постійного струму у вихровому потоці повітря, а також електричні параметри цього розряду та оптичні характеристики плазмового факелу мікророзряду. Температура заселення збуджених електронних рівнів визначалася за допомогою діаграм Больцмана, з використанням мультиплетів атома кисню (777, 844, 926 нм). У спектрі плазми мікророзряду присутні молекулярні смуги NO, OH, N₂ (В-А) і N₂ (С-В). Визначені температури заселення коливальних та обертальних рівнів. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Низкотемпературная плазма и плазменные технологии The secondary discharge supported by microdischarge in vortex flow Вторичный разряд, поддерживаемый микроразрядом в вихревом потоке Вторинний розряд, що підтримується мікророзрядом у вихровому потоці Article published earlier |
| spellingShingle | The secondary discharge supported by microdischarge in vortex flow Solomenko, Ok.V. Lendiel, V.V. Chernyak, V.Ya. Kalustova, D.O. Iukhymenko, V.V. Martysh, E.V. Prysiazhnevych, I.V. Shapoval, V.O. Низкотемпературная плазма и плазменные технологии |
| title | The secondary discharge supported by microdischarge in vortex flow |
| title_alt | Вторичный разряд, поддерживаемый микроразрядом в вихревом потоке Вторинний розряд, що підтримується мікророзрядом у вихровому потоці |
| title_full | The secondary discharge supported by microdischarge in vortex flow |
| title_fullStr | The secondary discharge supported by microdischarge in vortex flow |
| title_full_unstemmed | The secondary discharge supported by microdischarge in vortex flow |
| title_short | The secondary discharge supported by microdischarge in vortex flow |
| title_sort | secondary discharge supported by microdischarge in vortex flow |
| topic | Низкотемпературная плазма и плазменные технологии |
| topic_facet | Низкотемпературная плазма и плазменные технологии |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/81962 |
| work_keys_str_mv | AT solomenkookv thesecondarydischargesupportedbymicrodischargeinvortexflow AT lendielvv thesecondarydischargesupportedbymicrodischargeinvortexflow AT chernyakvya thesecondarydischargesupportedbymicrodischargeinvortexflow AT kalustovado thesecondarydischargesupportedbymicrodischargeinvortexflow AT iukhymenkovv thesecondarydischargesupportedbymicrodischargeinvortexflow AT martyshev thesecondarydischargesupportedbymicrodischargeinvortexflow AT prysiazhnevychiv thesecondarydischargesupportedbymicrodischargeinvortexflow AT shapovalvo thesecondarydischargesupportedbymicrodischargeinvortexflow AT solomenkookv vtoričnyirazrâdpodderživaemyimikrorazrâdomvvihrevompotoke AT lendielvv vtoričnyirazrâdpodderživaemyimikrorazrâdomvvihrevompotoke AT chernyakvya vtoričnyirazrâdpodderživaemyimikrorazrâdomvvihrevompotoke AT kalustovado vtoričnyirazrâdpodderživaemyimikrorazrâdomvvihrevompotoke AT iukhymenkovv vtoričnyirazrâdpodderživaemyimikrorazrâdomvvihrevompotoke AT martyshev vtoričnyirazrâdpodderživaemyimikrorazrâdomvvihrevompotoke AT prysiazhnevychiv vtoričnyirazrâdpodderživaemyimikrorazrâdomvvihrevompotoke AT shapovalvo vtoričnyirazrâdpodderživaemyimikrorazrâdomvvihrevompotoke AT solomenkookv vtorinniirozrâdŝopídtrimuêtʹsâmíkrorozrâdomuvihrovomupotocí AT lendielvv vtorinniirozrâdŝopídtrimuêtʹsâmíkrorozrâdomuvihrovomupotocí AT chernyakvya vtorinniirozrâdŝopídtrimuêtʹsâmíkrorozrâdomuvihrovomupotocí AT kalustovado vtorinniirozrâdŝopídtrimuêtʹsâmíkrorozrâdomuvihrovomupotocí AT iukhymenkovv vtorinniirozrâdŝopídtrimuêtʹsâmíkrorozrâdomuvihrovomupotocí AT martyshev vtorinniirozrâdŝopídtrimuêtʹsâmíkrorozrâdomuvihrovomupotocí AT prysiazhnevychiv vtorinniirozrâdŝopídtrimuêtʹsâmíkrorozrâdomuvihrovomupotocí AT shapovalvo vtorinniirozrâdŝopídtrimuêtʹsâmíkrorozrâdomuvihrovomupotocí AT solomenkookv secondarydischargesupportedbymicrodischargeinvortexflow AT lendielvv secondarydischargesupportedbymicrodischargeinvortexflow AT chernyakvya secondarydischargesupportedbymicrodischargeinvortexflow AT kalustovado secondarydischargesupportedbymicrodischargeinvortexflow AT iukhymenkovv secondarydischargesupportedbymicrodischargeinvortexflow AT martyshev secondarydischargesupportedbymicrodischargeinvortexflow AT prysiazhnevychiv secondarydischargesupportedbymicrodischargeinvortexflow AT shapovalvo secondarydischargesupportedbymicrodischargeinvortexflow |