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Journal articles on the topic 'High-Speed Plasma Jet'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Bobzin, K., M. Öte, M. A. Knoch, I. Alkhasli, and H. Heinemann. "High-Speed Video Analysis of the Process Stability in Plasma Spraying." Journal of Thermal Spray Technology 30, no. 4 (2021): 987–1000. http://dx.doi.org/10.1007/s11666-021-01159-1.

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AbstractIn plasma spraying, instabilities and fluctuations of the plasma jet have a significant influence on the particle in-flight temperatures and velocities, thus affecting the coating properties. This work introduces a new method to analyze the stability of plasma jets using high-speed videography. An approach is presented, which digitally examines the images to determine the size of the plasma jet core. By correlating this jet size with the acquisition time, a time-dependent signal of the plasma jet size is generated. In order to evaluate the stability of the plasma jet, this signal is an

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2

Yuan, Ye, Yan Zhang, Cheng Guo, et al. "Optical analysis method for fast plasma characterization of high-speed miniaturized synthetic jet." Chinese Optics Letters 20, no. 7 (2022): 073001. http://dx.doi.org/10.3788/col202220.073001.

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3

SAMIMY, M., J. H. KIM, J. KASTNER, I. ADAMOVICH, and Y. UTKIN. "Active control of high-speed and high-Reynolds-number jets using plasma actuators." Journal of Fluid Mechanics 578 (April 26, 2007): 305–30. http://dx.doi.org/10.1017/s0022112007004867.

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Localized arc filament plasma actuators are used to control an axisymmetric Mach 1.3 ideally expanded jet of 2.54 cm exit diameter and a Reynolds number based on the nozzle exit diameter of about 1.1×106. Measurements of growth and decay of perturbations seeded in the flow by the actuators, laser-based planar flow visualizations, and particle imaging velocimetry measurements are used to evaluate the effects of control. Eight actuators distributed azimuthally inside the nozzle, approximately 1 mm upstream of the nozzle exit, are used to force various azimuthal modes over a large frequency range

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4

Watanabe, Takayuki, Manabu Tanaka, Tasuku Shimizu, and Feng Liang. "Metal Nanoparticle Production by Anode Jet of Argon-Hydrogen DC Arc." Advanced Materials Research 628 (December 2012): 11–14. http://dx.doi.org/10.4028/www.scientific.net/amr.628.11.

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The purpose of this paper is to prepare nickel particles by arc plasma method with hydrogen addition. The effect of anode jet formation on the nanoparticle production was investigated by high-speed camera observations. The high-speed camera system with appropriate band-pass filters successfully provides the observation of anode jet image without cathode jet image. The areas of the anode jet and the cathode jet were separately estimated from the high-speed images. From these observations, the periodical fluctuation of the anode jet was confirmed. Higher hydrogen concentration leads to larger an

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5

Zhu, Xia, Taisuke Satoh, Hiromichi Toyota, Shinfuku Nomura, Yukiharu Iwamoto, and Pria Gautama. "Basic Characteristics of In-Liquid Plasma Jet and Electrode Damage." Key Engineering Materials 749 (August 2017): 76–80. http://dx.doi.org/10.4028/www.scientific.net/kem.749.76.

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The most progress towards a practical method of fusing municipal waste incineration ash has been in the use of a plasma jet that employs arc discharge, a form of thermal plasma. However, a remaining problem is that stable plasma generation is prevented by melting of the nozzle of the plasma-jet torch by the high-temperature plasma flow. With the objective of developing high-speed fusion treatment for waste materials using an in-liquid plasma jet, basic research was conducted on plasma stability and the durability of plasma-jet torches, including electrodes and nozzles. Basic plasma jet charact

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6

Hashizawa, Akio, Manabu Tanaka, Takayuki Watanabe, and Tomohiro Koga. "Effect of External Magnetic Field on Long DC Arc Characteristics with Rng-shaped Anode." MATEC Web of Conferences 333 (2021): 03004. http://dx.doi.org/10.1051/matecconf/202133303004.

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Fluctuation phenomena of plasma jet flow in an innovative long DC arc system with a ring-shaped anode were successfully clarified by a high-speed camera visualization. The long DC arc with long electrode gap distance more than 350 mm has been applied to gas decomposition due to its advantages of long plasma length, resulting in long residence time of treated gas. However, large heat loss at a conventional hemispherical-shaped anode was a critical issue in the long DC arc system. Therefore, the ring-shaped anode was utilized to convert large energy loss at the anode into the plasma jet flow. Hi

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7

Hashizawa, Akio, Manabu Tanaka, Takayuki Watanabe, and Tomohiro Koga. "Effect of External Magnetic Field on Long DC Arc Characteristics with Rng-shaped Anode." MATEC Web of Conferences 333 (2021): 03004. http://dx.doi.org/10.1051/matecconf/202133303004.

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Fluctuation phenomena of plasma jet flow in an innovative long DC arc system with a ring-shaped anode were successfully clarified by a high-speed camera visualization. The long DC arc with long electrode gap distance more than 350 mm has been applied to gas decomposition due to its advantages of long plasma length, resulting in long residence time of treated gas. However, large heat loss at a conventional hemispherical-shaped anode was a critical issue in the long DC arc system. Therefore, the ring-shaped anode was utilized to convert large energy loss at the anode into the plasma jet flow. Hi

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8

Mohammed, A. I., and C. S. Adams. "Ion shock layer formation during multi-ion-species plasma jet stagnation events." Physics of Plasmas 29, no. 7 (2022): 072307. http://dx.doi.org/10.1063/5.0087509.

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We report the characteristics of collisional plasma shocks formed during interactions between low density ([Formula: see text] cm−3), low temperature ([Formula: see text] eV), high velocity (30 km s−1), plasma jets and stagnant plasma of similar parameters. This investigation seeks to probe the structure of shocks in multi-ion-species plasmas, in particular, the presence of gradient-driven ion species separation at the shock front. The railgun-accelerated jets utilized here have previously been shown to exist in a collisional regime with intra-jet collisional mean-free-path substantially small

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9

Pogrebnyak, A. D., Yu N. Tyurin та A. P. Kobzev. "High-speed plasma jet modification and doping of α-Fe". Technical Physics Letters 27, № 8 (2001): 619–21. http://dx.doi.org/10.1134/1.1398947.

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10

Frolov, Vasiliy, and Yury Klochkov. "Numerical Simulation of Plasma Spraying Performance Index." E3S Web of Conferences 221 (2020): 03006. http://dx.doi.org/10.1051/e3sconf/202022103006.

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In recent years, there has been an increasing interest in plasma jet numerical simulation. Speed and temperature propagation in axial and radial direction in plasma jet significantly influences on speed and temperature of sprayed material and therefore on coating quality. However, there are few studies concerning plasma jet numerical simulation in modern software systems and they describe a specific problem. It is a wellknown fact that using simple structural components such as plasmatron heads for plasma thermal spraying allows us to increase the quality of zirconium oxide coatings by increas

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11

Sklodowski, Kamil D., Shreekrishna Tripathi, and Troy Carter. "Dynamic Formation of a Transient Jet from Arched Magnetized Laboratory Plasma." Astrophysical Journal 953, no. 1 (2023): 5. http://dx.doi.org/10.3847/1538-4357/acdf47.

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Abstract A laboratory plasma experiment was built to explore the eruptive behavior of arched magnetized plasmas with dimensionless parameters relevant to the Sun’s photosphere (β ≈ 10−3, Lundquist number ≈104, plasma radius/ion gyroradius ≈20, ion–neutral collision frequency ≫ion cyclotron frequency). Dynamic formation of a transient plasma jet was observed in the presence of the strapping magnetic field. The eruption leading to the jet is unintuitive because the arched plasma is both kink- and torus-stable. The jet structure erupts within a few Alfvén transit times from the formation of the a

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12

Bobzin, K., H. Heinemann, and A. O’Brien. "Capturing the Influence of Jet Fluctuations on Particles in Plasma Spraying." Journal of Thermal Spray Technology 31, no. 1-2 (2022): 59–69. http://dx.doi.org/10.1007/s11666-021-01307-7.

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AbstractInstabilities and fluctuations of the plasma jet in a thermal spray process can have a significant influence on the particle in-flight temperatures and velocities, affecting the properties of resulting plasma-sprayed coatings. Presented in this paper is a novel method for capturing the effects particles are exposed to in the plasma spraying process. High-speed camera images of a plasma jet generated by a cascaded three-cathode plasma generator (TriplexPro-210) were recorded for varying operating conditions. The images are processed using the inverse Abel transform. This transformation

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13

Ondac, P., A. Maslani, and M. Hrabovsky. "Investigation of the Arc-Anode Attachment Area by Utilizing a High-Speed Camera." PLASMA PHYSICS AND TECHNOLOGY 3, no. 1 (2016): 1–4. http://dx.doi.org/10.14311/ppt.2016.1.1.

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The arc-anode attachment in the DC plasma arc influences power distribution in the plasma, a lifespan of anode and flow structure of plasma jet. A movement of the attachment and the surrounding plasma was directly observed by using a high-speed camera (max. 1,080,000 fps). The observations were compared with cathode-anode voltage measurements (sample rate 80 MHz). We have directly measured the average velocity of the attachments and hydrodynamic waves above them, as well as the characteristic dwell times and dwell frequencies of the attachments.

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14

Wang, Lin, Zhi-xun Xia, Zhen-bing Luo, and Jun Chen. "Three-Electrode Plasma Synthetic Jet Actuator for High-Speed Flow Control." AIAA Journal 52, no. 4 (2014): 879–82. http://dx.doi.org/10.2514/1.j052686.

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15

Teschke, M., J. Kedzierski, E. G. Finantu-Dinu, D. Korzec, and J. Engemann. "High-speed photographs of a dielectric barrier atmospheric pressure plasma jet." IEEE Transactions on Plasma Science 33, no. 2 (2005): 310–11. http://dx.doi.org/10.1109/tps.2005.845377.

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16

Samimy, M., I. Adamovich, B. Webb, et al. "Development and characterization of plasma actuators for high-speed jet control." Experiments in Fluids 37, no. 4 (2004): 577–88. http://dx.doi.org/10.1007/s00348-004-0854-7.

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17

Bathgate, Stephen N., Marcela M. M. Bilek, Iver H. Cairns, and David R. McKenzie. "A thruster using magnetic reconnection to create a high-speed plasma jet." European Physical Journal Applied Physics 84, no. 2 (2018): 20801. http://dx.doi.org/10.1051/epjap/2018170421.

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Plasma thrusters propel spacecraft by the application of Lorentz forces to ionized propellants. Despite evidence that Lorentz forces resulting from magnetic reconnection in solar flares and Earth's magnetopause produce jets of energetic particles, magnetic reconnection has only recently been considered as a means of accelerating plasma in a thruster. Based on theoretical principles, a pulsed magnetic reconnection thruster consisting of two parallel-connected slit coaxial tubes was constructed. The thruster was operated in argon plasma produced by RF energy at 13.56 MHz. A 1.0 ms current pulse

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18

TICOŞ, C. M., I. JEPU, C. P. LUNGU, P. CHIRU, V. ZAROSCHI, and A. M. LUNGU. "Levitated dust particles subjected to plasma jet." Journal of Plasma Physics 76, no. 3-4 (2010): 501–11. http://dx.doi.org/10.1017/s0022377809990663.

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AbstractA dust crystal levitated in the sheath of a radio-frequency plasma is subjected to a pulsed plasma jet expelled from a minicoaxial gun. The dust particles, initially found at rest and self-organized in a 3-D structure, are dragged by the plasma jet for a short distance and come to rest when the action of the jet terminates. The trajectories of the microparticles are tracked in vertical and horizontal planes with a high-speed camera. From in situ observations of dust particle dynamics the dust acceleration is compared to numerical simulations.

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19

Plaschke, Ferdinand, and Heli Hietala. "Plasma flow patterns in and around magnetosheath jets." Annales Geophysicae 36, no. 3 (2018): 695–703. http://dx.doi.org/10.5194/angeo-36-695-2018.

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Abstract. The magnetosheath is commonly permeated by localized high-speed jets downstream of the quasi-parallel bow shock. These jets are much faster than the ambient magnetosheath plasma, thus raising the question of how that latter plasma reacts to incoming jets. We have performed a statistical analysis based on 662 cases of one THEMIS spacecraft observing a jet and another (second) THEMIS spacecraft providing context observations of nearby plasma to uncover the flow patterns in and around jets. The following results are found: along the jet's path, slower plasma is accelerated and pushed as

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20

Shanenkov, Ivan I., Dmitry S. Nikitin, Artur R. Nassyrbayev, Alexander I. Tsimmerman, and Alexander A. Sivkov. "Synthesis of Magnéli phases in a high-speed electric discharge plasma jet." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 11 (2024): 185–96. http://dx.doi.org/10.18799/24131830/2024/11/4847.

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Relevance. Currently, there is an active search for photocatalytic materials suitable for water decomposition and hydrogen production that exhibit activity when exposed to visible light, and are also accessible, chemically stable and safe. In this regard, a number of materials with the general formula TinO2n-1 (n=2–10) are distinguished, they are called Magnéli phases. Despite the fact that Magnéli phases exhibit significantly higher photocatalytic activity compared to traditional titanium oxides (rutile, anatase, brookite), their practical application is currently extremely difficult due to t

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21

Mahapatra, D., R. Sriram, and G. Jagadeesh. "Effect of counterflow argon plasma jet on aerodynamic drag of a blunt body at hypersonic Mach numbers." Aeronautical Journal 112, no. 1137 (2008): 683–87. http://dx.doi.org/10.1017/s0001924000590009.

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AbstractAn experimental investigation of aerodynamic drag reduction by counter How plasma jet injection from the stagnation region of a hemispherical blunt cylinder model flying at hypersonic Mach numbers are presented. Experiments are carried out in a hypersonic shock tunnel at four different jet-to-pitot pressure ratios namely 15·3, 24·52, 72·5 and 96·67 and three supply powers, namely 1·8KW, 2·7KW and 3·6KW. The flow fields around the test model are visualised using high speed schlieren technique. Direct force measurement is also performed using a single component accelerometer balance. The

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22

Zhang, Pengfei, Xin Liu, Mengjiao Lin, and Jia Zhang. "Research on the spatio-temporal characteristics of high energy pulsed plasma jets." Physics of Plasmas 29, no. 9 (2022): 093505. http://dx.doi.org/10.1063/5.0098307.

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This research proposes a high-energy pulsed plasma jet for producing highly dynamic and huge gradient plasma. The injected plasma enters the plasma sheath, and the stealth of the high-speed vehicle is achieved by modulating the dynamics of the plasma sheath electron density. The characteristics of the plasma were extensively diagnosed using current–voltage measurements, high-speed cameras, and optical emission spectroscopy. This includes the electrical parameters of the plasma and its spatial and temporal distribution. The deposited energy rises and then falls as the pressure rises. The high-s

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23

Kim, Young Sun, and Jichul Shin. "Performance Characteristics of a High-Speed Jet Produced by a Pulsed-Arc Spark Jet Plasma Actuator." Journal of the Korean Society for Aeronautical & Space Sciences 45, no. 11 (2017): 907–13. http://dx.doi.org/10.5139/jksas.2017.45.11.907.

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24

Afanas'ev, V. V., A. K. Kuz'min, S. A. Abrukov, V. N. Podymov, and S. V. Il'in. "Ignition of a fuel-air mixture with a high-speed plasma jet." Journal of Engineering Physics and Thermophysics 67, no. 5-6 (1995): 1059–61. http://dx.doi.org/10.1007/bf00852723.

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25

Tiwari, Nirupama, S. N. Sahasrabudhe, N. K. Joshi, and A. K. Das. "Study of jet fluctuations in DC plasma torch using high speed camera." Journal of Physics: Conference Series 208 (February 1, 2010): 012134. http://dx.doi.org/10.1088/1742-6596/208/1/012134.

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26

Samimy, M., M. Kearney-Fischer, J. H. Kim, and A. Sinha. "High-Speed and High-Reynolds-Number Jet Control Using Localized Arc Filament Plasma Actuators." Journal of Propulsion and Power 28, no. 2 (2012): 269–80. http://dx.doi.org/10.2514/1.b34272.

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27

Kearney-Fischer, Martin, Jin-Hwa Kim, and Mo Samimy. "Noise Control of a High Reynolds Number High Speed Heated Jet Using Plasma Actuators." International Journal of Aeroacoustics 10, no. 5-6 (2011): 635–58. http://dx.doi.org/10.1260/1475-472x.10.5-6.635.

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28

Bessmertniy, Vasiliy S., Diana O. Bondarenko, Sofia V. Varfolomeeva, and Alexey V. Makarov. "Block Foam Glass with Plasma Protective and Decorative Coatings." Materials Science Forum 974 (December 2019): 96–100. http://dx.doi.org/10.4028/www.scientific.net/msf.974.96.

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An innovative energy-saving technology for producing block foam glass with a protective decorative coating has been developed, including the preliminary application of an intermediate heat resistant coating followed by the application of the main coating and the plasma jet melting. The optimal composition of the intermediate heat resistant coating, its preparation technology and laying on the front surface of the foam glass block are determined. It is shown that the main factor shaping the quality of the foam glass insulating block with a protective decorative coating is the speed of the plasm

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29

Sivkov, Alexander, Ilyas Rakhmatullin, and Anastasiya Makarova. "The Possibility of Boron Carbide Coating Formation by Using a Coaxial Magnetoplasma Accelerator." Advanced Materials Research 1097 (April 2015): 45–49. http://dx.doi.org/10.4028/www.scientific.net/amr.1097.45.

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A coaxial magnetoplasma accelerator can generate a dense and high velocity plasma jet by applying a pulsed high-current arc-discharge. The results of the experiment investigations of plasmadynamic synthesis in the B-C system have been shown while hyper speed jet boron carbide electric–discharged plasma steams onto copper substrate. The boron carbide coatings were formed on the copper substrate without a binder material. The formation of the crystalline boron carbide coating on the copper substrate was analysed through X-ray diffraction, transmission electron microscopy and scanning electron mi

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30

Toyota, Hiromichi, Xia Zhu, Ryoya Shiraishi, Kazuto Nakajima, Yukiharu Iwamoto, and Shinfuku Nomura. "Synthesizing Cubic Diamond Crystal Using DC Plasma Jet CVD." Key Engineering Materials 825 (October 2019): 71–76. http://dx.doi.org/10.4028/www.scientific.net/kem.825.71.

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Diamond crystals are successfully synthesized by irradiating DC arc plasma jet to the substrate set in a methanol solution. It is the important procedure to preheat the substrate by inert Ar plasma jet before introducing the methanol solution gas to the plasma jet gun. The effects of two experimental conditions, the incident power and the substrates, are investigated. In the case of the Si substrate, cubic crystalline diamond grains of same size are synthesized at the plasma power of 470W. High speed hetero epitaxy is expected by using this method. In the case of the tungsten carbide substrate

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31

Nikitin, Dmitry S., Artur R. Nassyrbayev, Ivan I. Shanenkov, Yuliya N. Vympina, Alexander A. Sivkov, and Evgenia G. Orlova. "Formation of nanosized copper silicides in a high-speed electric discharge plasma jet." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 7 (2024): 33–42. http://dx.doi.org/10.18799/24131830/2024/7/4487.

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Relevance. The search for suitable materials for creating a new generation of anodes in lithium-ion batteries that have not only high capacity, but also high electrical conductivity. For this purpose, the attempts have been made to use silicon Si, which has a high specific capacitance, instead of graphite C, but this material does not have high electrical conductivity. Copper silicides, in addition to high specific capacity, have high electrical conductivity values, since they do not react with lithium during operation, and therefore can be used to solve problems in the development of the abov

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32

Zong, Haohua, Matteo Chiatto, Marios Kotsonis, and Luigi de Luca. "Plasma Synthetic Jet Actuators for Active Flow Control." Actuators 7, no. 4 (2018): 77. http://dx.doi.org/10.3390/act7040077.

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The plasma synthetic jet actuator (PSJA), also named as sparkjet actuator, is a special type of zero-net mass flux actuator, driven thermodynamically by pulsed arc/spark discharge. Compared to widely investigated mechanical synthetic jet actuators driven by vibrating diaphragms or oscillating pistons, PSJAs exhibit the unique capability of producing high-velocity (>300 m/s) pulsed jets at high frequency (>5 kHz), thus tailored for high-Reynolds-number high-speed flow control in aerospace engineering. This paper reviews the development of PSJA in the last 15 years, covering the major achi

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33

Wang Zhen, Liu Jin-Yao, Zhang Jin-shuo, Jiang Nan, Yan Hui-jie, and Song jian. "Investigation of Plasma Dynamics in a Magnetized Coaxial Plasma Gun." Acta Physica Sinica 74, no. 17 (2025): 0. https://doi.org/10.7498/aps.74.20250733.

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The magnetized coaxial gun is an efficient plasma injection device with significant applications in fusion fueling, astrophysical jet simulation, and magnetic reconnection studies. In this work, three typical discharge regions—spheromak region, diffusive region, and jet region—were observed using high-speed imaging and magnetic field measurements. The dynamic characteristics of the plasma in each region were systematically investigated. Based on ideal magnetohydrodynamic (MHD) theory, the magnetic field configurations, rotational behavior, and axial motion mechanisms of the plasma in different

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34

Ohta, Takashi, Daisuke Ogasawara, Takahiro Iwai, Hidekazu Miyahara, and Akitoshi Okino. "Development of Ultrasonic Pulsed Plasma Jet Source for Remote Surface Treatment." Applied Sciences 13, no. 1 (2022): 444. http://dx.doi.org/10.3390/app13010444.

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We have developed a supersonic pulsed plasma jet device capable of long-distance and high-speed processing, and investigated its basic characteristics for surface treatment applications, mainly in the material and medical fields. The developed apparatus is equipped with a mechanism to transport active species in the plasma to the object to be treated by jetting the generated high-density plasma outward with supersonic pulse jets, which allows the gas flow velocity to increase significantly during pulse jetting compared with plasma generation. This enables the active species in the plasma to re

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35

Han, Hai Ling. "Motion Analysis of Powder Particle in Plasma Jet." Advanced Materials Research 709 (June 2013): 201–4. http://dx.doi.org/10.4028/www.scientific.net/amr.709.201.

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In order to do research on the motion time of plasma spray gun in powder particle flame plating, the paper made an analog computation to powder particle motion process of plasma spray gun by establishing powder particle equation of motion and thermal evolution equation, after that the motion time of powder particle in electric arc was obtained. It provided advantageous theoretical basis for plasma spray gun design after confirming the computation results by making use of high-speed photography technology.

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36

Zong, Haohua, and Marios Kotsonis. "Formation, evolution and scaling of plasma synthetic jets." Journal of Fluid Mechanics 837 (December 20, 2017): 147–81. http://dx.doi.org/10.1017/jfm.2017.855.

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Plasma synthetic jet actuators (PSJAs), capable of producing high-velocity pulsed jets at high frequency, are well suited for high-Reynolds-number subsonic and supersonic flow control. The effects of energy deposition and actuation frequency on the formation and evolution characteristics of plasma synthetic jets (PSJs) are investigated in detail by high-speed phase-locked particle imaging velocimetry (PIV). Increasing jet intensity with energy deposition is mainly contributed by the increasing peak jet velocity ($U_{p}$), while decreasing jet intensity with actuation frequency is attributed to

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37

Plaschke, F., H. Hietala, and V. Angelopoulos. "Anti-sunward high-speed jets in the subsolar magnetosheath." Annales Geophysicae 31, no. 10 (2013): 1877–89. http://dx.doi.org/10.5194/angeo-31-1877-2013.

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Abstract. Using 2008–2011 data from the five Time History of Events and Macroscale Interactions during Substorms (THEMIS) spacecraft in Earth's subsolar magnetosheath, we study high-speed jets identified as intervals when the anti-sunward component of the dynamic pressure in the subsolar magnetosheath exceeds half of its upstream solar wind value. Based on our comprehensive data set of 2859 high-speed jets, we obtain the following statistical results on jet properties and favorable conditions: high-speed jets occur predominantly downstream of the quasi-parallel bow shock, i.e., when interplane

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38

Crawley, Michael, Lior Gefen, Ching-Wen Kuo, Mo Samimy, and Roberto Camussi. "Vortex dynamics and sound emission in excited high-speed jets." Journal of Fluid Mechanics 839 (January 29, 2018): 313–47. http://dx.doi.org/10.1017/jfm.2017.906.

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This work aims to study the dynamics of and noise generated by large-scale structures in a Mach 0.9 turbulent jet of Reynolds number $6.2\times 10^{5}$ using plasma-based excitation of shear layer instabilities. The excitation frequency is varied to produce individual or periodic coherent ring vortices in the shear layer. First, two-point cross-correlations are used between the acoustic near field and far field in order to identify the dominant noise source region. The large-scale structure interactions are then investigated by stochastically estimating time-resolved velocity fields using time

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39

Matsoukas, George, and Noor A. Ahmed. "Manufacture of Model Apollo Capsule Utilizing Pulsed-Plasma Jet for Bow Shock Dispersion." Applied Mechanics and Materials 607 (July 2014): 139–44. http://dx.doi.org/10.4028/www.scientific.net/amm.607.139.

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High speed Schlieren imaging, pressure tapping points and optical emission spectroscopy for temperature and heat flux data are essential measurement techniques for analysis of bow shock dispersion, aerodynamic performance or heat transfer of spacecraft in atmospheric re-entry. However, design and manufacturing of a high voltage pulsed-plasma jet for testing in a supersonic counterflow deserves careful examination. High voltage electrification combined with high temperature sparking between electrodes possesses several design difficulties and manufacturing challenges which need to be addressed

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40

Schlich, Michele, Luca Casula, Aurora Musa, et al. "Needle-Free Jet Injectors and Nanosuspensions: Exploring the Potential of an Unexpected Pair." Pharmaceutics 14, no. 5 (2022): 1085. http://dx.doi.org/10.3390/pharmaceutics14051085.

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Needle-free liquid jet injectors are medical devices used to administer pharmaceutical solutions through the skin. Jet injectors generate a high-speed stream of liquid medication that can puncture the skin and deliver the drug to the underlying tissues. In this work, we investigated the feasibility of using liquid jet injectors to administer nanosuspensions, assessing the impact of the jet injection on their pharmaceutical and physicochemical properties. For this purpose, the model drug diclofenac was used to prepare a set of nanosuspensions, stabilized by poloxamer 188, and equilibrated at di

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41

Forster, Roman, Michal Jerzy Szulc, and Jochen Schein. "High-Speed Tomography—A New Approach to Plasma Bulk Velocity Measurement." Applied Sciences 14, no. 20 (2024): 9160. http://dx.doi.org/10.3390/app14209160.

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The plasma bulk velocity is one of the key parameters describing the behavior of a plasma jet and is relevant for applications such as plasma spraying or electric propulsion. Therefore, different measurement techniques to determine the velocity were developed in the past. This paper presents a novel, non-invasive method for spatially resolved velocity measurements. The method is based on tracking of characteristic features in tomographic reconstructions of the plasma plume. A high-speed image recording system combined with tomographic acquisition is therefore the backbone of this method. The p

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Hanafusa, Hiroaki, Ryosuke Ishimaru, and Seiichiro Higashi. "High-temperature and high-speed oxidation of 4H-SiC by atmospheric pressure thermal plasma jet." Japanese Journal of Applied Physics 56, no. 4 (2017): 040304. http://dx.doi.org/10.7567/jjap.56.040304.

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Tsyganov, D. L., A. I. Veremejchik, M. Grądzka-Dahlke, M. I. Sazonov, and V. M. Khvisevich. "Tribological studies of thin diamond-like films synthesized using high-speed plasma jet." Journal of Friction and Wear 37, no. 3 (2016): 282–88. http://dx.doi.org/10.3103/s1068366616030168.

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Pashchina, A. S., V. G. Brovkin, and N. M. Ryazanskiy. "Interaction of high-speed plasma jet with a pulse of powerful microwave radiation." Journal of Physics: Conference Series 891 (November 10, 2017): 012296. http://dx.doi.org/10.1088/1742-6596/891/1/012296.

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Raghu, S., and G. Goutevenier. "Visualization of a high-speed, luminous plasma jet using a focusing schlieren technique." Experiments in Fluids 19, no. 2 (1995): 136–38. http://dx.doi.org/10.1007/bf00193860.

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LI, Hua, Minglei LI, Hongcheng ZHU, et al. "Realizing high efficiency and large-area sterilization by a rotating plasma jet device." Plasma Science and Technology 24, no. 4 (2022): 045501. http://dx.doi.org/10.1088/2058-6272/ac550d.

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Abstract By tilting a plasma jet and rotating 360°, a large-area can be scanned and sterilized in a short time. Compared with the previous array device, this pipe has the significant advantages of high sterilization uniformity and low gas consumption. Firstly, a rotatable plasma jet device, which can control the swing and rotation of a jet pipe, is designed, and a corresponding theoretical model is established to guide the experiment. Secondly, with Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) as the target bacteria, the device achieves a short sterilization time of 158 s—t

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Kawashima, Tomohisa, Seiji Ishiguro, Toseo Moritaka, Ritoku Horiuchi, and Kohji Tomisaka. "Mushroom-instability-driven Magnetic Reconnections in Collisionless Relativistic Jets." Astrophysical Journal 928, no. 1 (2022): 62. http://dx.doi.org/10.3847/1538-4357/ac5591.

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Abstract We study the kinetic plasma dynamics in collisionless relativistic jets with velocity shear, by carrying out particle-in-cell simulations in the transverse plane of a jet. It is discovered that intermittent magnetic reconnections (MRs) are driven by mushroom instability (MI), which is an important kinetic-scale plasma instability in the plasma shear flows with relativistic bulk speed. We refer to this sequence of kinetic plasma phenomena as “MI-driven MR.” The MI-driven MRs intermittently occur with moving the location of the reconnection points from the vicinity of the initial veloci

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Liu, Rubing, Shenghui Xue, Wentao Wei, Qi Lin, and Kun Tang. "Internal Characteristics of Air-Supplied Plasma Synthetic Jet Actuator." Aerospace 10, no. 3 (2023): 223. http://dx.doi.org/10.3390/aerospace10030223.

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Conventional plasma synthetic jet actuators rely only on jet orifice for suction when functioning for long durations. A limited supplementary gas leads to jet velocity reduction and weakening of the flow control ability. Therefore, this study proposes an air-supplied actuator with a check valve externally connected to the cavity to improve its gas-supplying ability and jet performance. A quartz glass discharge chamber is developed to clarify the internal working mechanism of the air-supplied actuator. High-speed schlieren is employed to photograph the internal flow field of the discharge chamb

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MacDonald, N. R., and K. I. Nishikawa. "From electrons to Janskys: Full stokes polarized radiative transfer in 3D relativistic particle-in-cell jet simulations." Astronomy & Astrophysics 653 (September 2021): A10. http://dx.doi.org/10.1051/0004-6361/201937241.

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Context. Despite decades of dedicated observation and study, the underlying plasma composition of relativistic extragalactic jets remains largely unknown. Aims. Relativistic magnetohydrodynamic (RMHD) models are able to reproduce many of the observed macroscopic features of these outflows (e.g., recollimation shocks, jet sheaths and spines, bow shocks, and enshrouding jet cocoons). The nonthermal synchrotron emission detected by very long baseline interferometric arrays, however, is a by-product of the kinetic-scale physics occurring within the jet, physics that is not modeled directly in most

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SONG, Guozheng, Haohua ZONG, Hua LIANG, Zhi SU, Like XIE, and Xing ZHENG. "Parametric study of high-frequency characteristics of plasma synthetic jet actuator." Plasma Science and Technology 23, no. 12 (2021): 125503. http://dx.doi.org/10.1088/2058-6272/ac30d7.

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Abstract A major issue of plasma synthetic jet actuator (PSJA) is the severe performance deterioration at high working frequency. In this study, experiments and numerical simulation are combined together to investigate the influence of thermal conductivity, throat length (L th) and discharge duration (T d) on the high-frequency characteristics of PSJA. Results show that the variation of the actuator thermal conductivity and discharge duration will not alter the saturation frequency of the actuator, whereas decreasing the throat length results in an increase of the saturation frequency. For a s

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