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Journal articles on the topic 'Installed jets'

Author: Grafiati

Published: 24 May 2025

Last updated: 31 July 2025

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1

Le, Minh Duc, Shiferaw Regassa Jufar, Dinh Nghia Duong, and Thi Phuong Quyen Nguyen. "A Study on Swirling Jets Flow Controlled by Two Tandem Bodies." Energies 15, no. 10 (2022): 3590. http://dx.doi.org/10.3390/en15103590.

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This study presents the effects of using two centerbodies arranged in tandem on the flow and velocity properties of swirling jets. The centerbodies are installed concentrically downstream of the jets to modify the wake. Smoke flow visualization was employed to illustrate the flow behaviors, while the particle image velocimetry technique was utilized to investigate the velocity fields, turbulent properties, vorticities, and Lagrangian time and length scales. The toroidal recirculation and vortex shedding are found near the field using one centerbody. The recirculation zone is evolved from the e

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2

Липко, Юрий, Yuriy Lipko, Александр Пашинин, et al. "Geomagnetic effects caused by rocket exhaust jets." Solar-Terrestrial Physics 2, no. 3 (2016): 43–55. http://dx.doi.org/10.12737/22284.

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In the space experiment Radar–Progress, we have made 33 series of measurements of geomagnetic variations during ignitions of engines of Progress cargo spacecraft in low Earth orbit. We used magneto-measuring complexes, installed at observatories of the Institute of Solar-Terrestrial Physics of Siberian Branch of the Russian Academy of Sciences, and magnetotelluric equipment of a mobile complex. We assumed that engine running can cause geomagnetic disturbances in field tubes crossed by the spacecraft. When analyzing experimental data, we took into account the following space weather factors: so

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3

Mathews, Logan T., and Kent L. Gee. "An investigation of shock cell-related noise in an installed, full-scale tactical jet engine using acoustical holography." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A325. http://dx.doi.org/10.1121/10.0023683.

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Shock cells in imperfectly expanded supersonic jet flows have been found to contribute to the noise radiated by these jets. Acoustic phenomena such as screech and broadband shock-associated noise have been linked to the shock cell structure in jets. Acoustical holography has been used to study various jet noise source and radiation characteristics. Holography-based reconstructions near the acoustic source in an installed, full-scale tactical jet engine have yielded features indicative of the known shock cell structure in the jet. This paper presents these results and investigates the character

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4

Липко, Юрий, Yuriy Lipko, Александр Пашинин, et al. "Geomagnetic effects caused by rocket exhaust jets." Solnechno-Zemnaya Fizika 2, no. 3 (2016): 33–40. http://dx.doi.org/10.12737/19634.

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In the space experiment Radar–Progress, we have made 33 series of measurements of geomagnetic variations during ignitions of engines of Progress cargo spacecraft in low Earth orbit. We used magneto-measuring complexes, installed at observatories of the Institute of Solar-Terrestrial Physics of Siberian Branch of the Russian Academy of Sciences, and magnetotelluric equipment of a mobile complex. We assumed that engine running can cause geomagnetic disturbances in flux tubes crossed by the spacecraft. When analyzing experimental data, we took into account space weather factors: solar wind parame

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5

Kinoshita, Toshiki, Hiroshi Fukuoka, and Ikurou Umezu. "Numerical Analysis of Behavior on Opposing Unsteady Supersonic Jets in a Flow Field with Shields." Materials Science Forum 910 (January 2018): 96–101. http://dx.doi.org/10.4028/www.scientific.net/msf.910.96.

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Collision dynamics of opposing unsteady supersonic jets injected in background gas with shock waves were calculated to simulate double pulsed laser ablation. Since the jets are deflected by collision and the motion of debris is ballistic. This characteristic can be used to reduce the number of debris when shields are mounted in front of substrate. The flow of jets through installed shields is complicated by the interaction between shields and jets, and between shields and shock waves. We investigate influence of shield position on the shock waves and the jets by numerical calculations. Axisymm

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6

IKEDA, Toshiki, Tasuku HORI, and Nobuo OGAWA. "721 The jets into counter flowing flow (In the case of installed side-wall)." Proceedings of the Fluids engineering conference 2005 (2005): 106. http://dx.doi.org/10.1299/jsmefed.2005.106.

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7

Tsurusaki, Hiromu, and Takahiro Kinoshita. "Flow Control of Rotating Stall in a Radial Vaneless Diffuser." Journal of Fluids Engineering 123, no. 2 (2000): 281–86. http://dx.doi.org/10.1115/1.1351174.

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The instabilities of a backflow layer on a diffuser wall and the main flow with vorticity have already been shown theoretically to cause the occurrence of rotating stall in a vaneless diffuser. These instabilities, however, have not yet been proven to exist experimentally. This study was carried out to examine the factors contributing to the occurrence of rotating stall using a jet installed in a diffuser. Rotating stall was completely suppressed by a jet that was set in the direction opposite to the vector of the impeller peripheral velocity, and amplified by the jet set in the same direction

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8

Wu, Xuetao, Rong Zhu, Guangsheng Wei, and Kai Dong. "Influence of lance height and angle on the penetration depth of inclined coherent and conventional supersonic jets in electric arc furnace steelmaking." Journal of Mining and Metallurgy, Section B: Metallurgy, no. 00 (2020): 19. http://dx.doi.org/10.2298/jmmb190225019w.

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Nowadays, coherent and conventional supersonic jets are widely used in electric arc furnace (EAF)steelmaking processes. Generally, these jets are installed in the EAF oven wall with a tilt angle of 35-45?. However, limited studies have been conducted on the impact characteristics of these inclined supersonic jets. This study developed an optimized theoretical model to calculate the penetration depth of inclined coherent and conventional supersonic jets by combining theoretical modeling and numerical simulations. The computational fluid dynamics results are validated against water model experim

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9

Aunapu, Nicole V., Ralph J. Volino, Karen A. Flack, and Ryan M. Stoddard. "Secondary Flow Measurements in a Turbine Passage With Endwall Flow Modification." Journal of Turbomachinery 122, no. 4 (2000): 651–58. http://dx.doi.org/10.1115/1.1311286.

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A flow modification technique is introduced in an attempt to allow increased turbine inlet temperatures. A large-scale two half-blade cascade simulator is used to model the secondary flow between two adjacent turbine blades. Various flow visualization techniques and measurements are used to verify that the test section replicates the flow of an actual turbine engine. Two techniques are employed to modify the endwall secondary flow, specifically the path of the passage vortex. Six endwall jets are installed at a location downstream of the saddle point near the leading edge of the pressure side

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10

Yuksel, Yalcin, Selahattin Kayhan, Yesim Celikoglu, and Kubilay Cihan. "OPEN TYPE QUAY STRUCTURES UNDER PROPELLER JETS." Coastal Engineering Proceedings 1, no. 33 (2012): 19. http://dx.doi.org/10.9753/icce.v33.structures.19.

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In recent years, dramatically increases in ship dimensions and installed engine power, introduction of new type of special purpose ships and use of roll-on/roll-of, ferries, container ships can cause damage which in many cases threatens to undermine berth structures. Vessel jets of these types of ships can change flow area and cause erosion and scour around foundation of berth structures. Due to the damages in berth structures maintenance and repair cost may increase and also cause management losses. For this reason vessel jet induced the flow area around the berth structures during ships bert

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11

Abid, Mohammed F. "A Modified Correlation to Evaluate Liquid Mass Transfer Coefficient in an Impinging-Jet Tall Bubble Column." Tikrit Journal of Engineering Sciences 13, no. 3 (2006): 54–77. http://dx.doi.org/10.25130/tjes.13.3.03.

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An impinging-jet bubble column has been installed in Al- Mansoor Co.-Baghdad for measurements of the ozone mass transfer applications in water treatment Two injectors were used to produce turbulent gas-liquid jets in the working fluid by placing them at an intersecting angle of 1200 . The impact of the two jets increased the gas-liquid mass transfer rates. Experiments are conducted at different ranges of Reynolds number for gas and liquid such that 12.8<ReG< 78 and 804.24<ReL<2928. A correlation to predict volumetric liquid mass transfer coefficient is developed based on CSTRM appl

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12

Siller, Henri A., Jonas König, Stefan Funke, Sebastian Oertwig, and Larisa Hritsevskyy. "Acoustic source localization on a model engine jet with different nozzle configurations and wing installation." International Journal of Aeroacoustics 16, no. 4-5 (2017): 403–17. http://dx.doi.org/10.1177/1475472x17719102.

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The source distribution in the dual jets of a 1:10 scale jet engine model was investigated in a large anechoic facility. A linear microphone array was used to record the data and the analysis was performed with the SODIX method, an optimization technique that fits a model distribution of sound sources with non-uniform directivity to the measured cross-spectral matrix. Configurations with a plain secondary nozzle and a secondary nozzle with a serrated trailing edge were investigated with and without a wing installed above the engine. The results show that the SODIX method is able to resolve the

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13

Rhee, Dong Ho, Yong Woo Nam, and Hyung Hee Cho. "Local Heat/Mass Transfer With Various Rib Arrangements in Impingement/Effusion Cooling System With Crossflow." Journal of Turbomachinery 126, no. 4 (2004): 615–26. http://dx.doi.org/10.1115/1.1791287.

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The present study has been conducted to investigate the effect of rib arrangements on flow and heat/mass transfer characteristics for an impingement/effusion cooling system with initial crossflow. Two perforated plates of square hole array are placed in parallel and staggered arrangements with a gap distance of 2d and the crossflow passes between the injection and effusion plates. Both the injection and effusion hole diameters d are 10 mm and Reynolds number based on the hole diameter and hole-to-hole pitch are fixed at 10,000 and 6d, respectively. Square ribs of various rib arrangements and a

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14

Straub, Lorenz G., John B. Herbich, and C. E. Bowers. "AN EXPERIMENTAL STUDY OF HYDRAULIC BREAKWATERS." Coastal Engineering Proceedings 1, no. 6 (2011): 43. http://dx.doi.org/10.9753/icce.v6.43.

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A hydraulic or water-jet breakwater is formed by- forcing water through a series of nozzles mounted on a pipe which is installed perpendicular to the direction of the incident waves. The jets create a surface current which results in breaking of the incident wave. Apparently, this effect is primarily responsible for attenuation of the incident wave. An earlier development, the pneumatic breakwater, operates on a similar principle with a horizontal surface current induced by rising air bubbles.

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15

Shashurin, Alexandr, Nickolay Ivanov, Andrey Vasilyev, Yuri Elkin, and Zhenish Razakov. "CONTRIBUTION OF NON-ISOTHERMAL JETS TO THE PROCESSES OF NOISE GENERATION OF ENERGY MACHINES WHEN INSTALLING SILENCERS." Akustika, VOLUME 41 (2021): 30–33. http://dx.doi.org/10.36336/akustika20214130.

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The method of James Lighthill is known and widely used, which allows determining the acoustic power of isothermal jets. A mathematical model for calculating the acoustic parameters (sound power, radiation pattern) of non-isothermal sound jets is proposed, taking into account the noise silencer installed in the gas exhaust tract. At the output, the equations of continuity, the amount of motion, energy, as well as the Lighthill wave equation are used. A statistical model is used as a turbulence model for calculations. A physical mechanism of noise generation by turbulent flows is proposed, which

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16

Voskoboinick, Vladimir, Oleksandr Voskoboinyk, Oleg Chertov, Andrey Voskoboinick, and Lidiia Tereshchenko. "Hydrodynamic Noise of Pulsating Jets through Bileaflet Mechanical Mitral Valve." BioMed Research International 2020 (May 30, 2020): 1–10. http://dx.doi.org/10.1155/2020/1024096.

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Experimental research results of hydrodynamic noise of pulsating flow through a bileaflet mechanical mitral valve are presented. The pulsating flow of pure water corresponds to the diastolic mode of the cardiac rhythm heart. The valve was located between the model of the left atrium and the model of the left ventricle of the heart. A coordinate device, on which a block of miniature sensors of absolute pressure and pressure fluctuations was installed, was located inside the model of the left ventricle. It is found that the hydrodynamic noise of the pulsating side jet of the semiclosed valve is

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17

Faruoli, M., G. Abbruzzese, RM Di Tommaso, and E. Nino. "Visualization of a Small Jet Synthetic Using a Particle Image Velocimetry and Background-Oriented Schlieren Techniques." Journal of Physics: Conference Series 2293, no. 1 (2022): 012002. http://dx.doi.org/10.1088/1742-6596/2293/1/012002.

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Abstract This work reports the results of experimental investigations carried out on a submerged synthetic jet obtained through the use of a headset speaker piloted with an appropriate sinusoidal signal at a frequency of 380 Hz. The study begins with the construction of a device that, exploiting the well-known transport properties of impacting jets, was able to improve local ventilation and the removal of excess moisture, due to the natural transpiration of human skin in people forced to assume the same position for prolonged periods such as professional drivers; bedridden patients; etc… Subje

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18

Mathews, Logan T., and Kent L. Gee. "Acoustic source characterization of shock-associated noise in an installed, full-scale F404 engine." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A63. http://dx.doi.org/10.1121/10.0026812.

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Shock-associated noise in supersonic jets is an important factor in acoustic radiation, particularly in the upstream direction. A previous paper [L. T. Mathews et al., J. Acoust. Soc. Am. 154, A325 (2023)] discussed a preliminary source characterization of shock-associated noise in a full-scale, installed tactical jet engine. Acoustical holography was used to reconstruct the acoustic behavior near the jet and high-amplitude features were produced that were consistent with shock-associated noise sources. This paper presents a more detailed characterization of shock-related noise in the jet usin

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19

Fung Huang, Rong, and Kuo Tong Chang. "Evolution and Turbulence Properties of Self-Sustained Transversely Oscillating Flow Induced by Fluidic Oscillator." Journal of Fluids Engineering 129, no. 8 (2007): 1038–47. http://dx.doi.org/10.1115/1.2746905.

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The evolution process and turbulence properties of a transversely oscillating flow induced by a fluidic oscillator are studied in a gravity-driven water tunnel. A planar jet is guided to impinge a specially designed crescent surface of a target blockage that is enclosed in a cavity of a fluidic oscillator. The geometric configuration of the cavity transforms the inherent stability characteristics of the jet from convective instability to absolute instability, so that the jet precedes the persistent back and forth swinging in the cavity. The swinging jet is subsequently directed through two pas

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20

Proença, A. R., and J. L. T. Lawrence. "Far-field pressure measurements of elliptic jets discharged close to a wing." IOP Conference Series: Materials Science and Engineering 1226, no. 1 (2022): 012048. http://dx.doi.org/10.1088/1757-899x/1226/1/012048.

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Abstract This paper presents a preliminary experimental investigation into the acoustics of two elliptical jet nozzles installed close to a wing model. Acoustic pressure data is obtained for a range of observer polar angles mounted in the far field of the jets. Three nominal jet Mach numbers, namely 0.4, 0.6 and 0.8 are studied. Results suggest that the elliptic jets surveyed provide a noise reduction of the jet-surface installation noise source. The noise reduction is maximum in the forward arc and in the order of 1 dB for the fully-corrected overall sound pressure level data. Additionally, t

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21

Huang, Biao, Shiqiang Wu, David Z. Zhu, and Fangfang Wang. "Mitigating peak pressure of storm geysering by orifice plates installed at the top of vent pipes." Water Science and Technology 78, no. 7 (2018): 1587–96. http://dx.doi.org/10.2166/wst.2018.436.

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Abstract Large air pockets can be trapped in storm sewer systems during intense rain events. Uncontrolled release of these air pockets may cause geysering and pressure surges, resulting in flooding, pipe failures and safety issues. Thus, there is a great need to develop methods to retrofit existing sewer systems and to provide guidance on system design. A large-scale physical model was established to evaluate air-control orifice plates in reducing geysering intensity by utilizing air cushion effects over the process of air escape. Experimental results indicate that the magnitude of pressure fl

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22

Chudyk, Ihor, and Denys Panevnyk. "Determination of Experimental Characteristics of a Jet-vortex Pump." Periodica Polytechnica Mechanical Engineering 68, no. 4 (2024): 361–69. https://doi.org/10.3311/ppme.38631.

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A methodology has been developed and the results of experimental studies of high-pressure jet-vortex pump models with a mixing chamber and working nozzle area ratio of 3.429 and 3.795 have been obtained. In the flow part of the pump, inclined guide elements for swirling the mixed flows are installed. An increase in the velocity of swirling screw jets increases the level of turbulence, intensifies the energy exchange of the mixed media, and improves the conditions for transferring kinetic energy from the working flow to the injected one. Improvement of the flow mixing mechanism allows increasin

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23

Kysliakov, V. H., I. O. Manachyn, V. I. Yelisieiev, and O. L. Rudenko. "Study of gas-powder jets injection by cold modeling methods." Fundamental and applied problems of ferrous metallurgy, no. 38 (2024): 186–98. https://doi.org/10.52150/2522-9117-2024-38-186-198.

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The aim of the work is to study the processes of injecting gas-powder jets into a liquid bath on cold models and determine the processing parameters. To implement the cold modeling, an installation was mounted at the laboratory base of the Institute of Ferrous Metallurgy, which provides a controlled reagent injection. The reagents used were soda, lime, and iron (II) oxide. The simulation was carried out with the reagent being dispensed into a dry container and into a container with water, which was an imitation of a ladle. Before pouring the reagent into the dosing device, sieving was performe

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24

Ramírez-Cuellar, J., M. P. Guerrero-Mata, L. A. Leduc, and R. Colás. "Modelling descaling during hot rolling of steel." Journal de Physique IV 120 (December 2004): 209–15. http://dx.doi.org/10.1051/jp4:2004120024.

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A computer model was developed to study the stresses that develop within the oxide formed on the surface of reheated steel slabs. The model considers that the crust grows during reheating following temperature dependent parabolic rates, and, as result of its thickness and growth rate, it will be stressed. Removal of this crust takes place by the impingement of water from high pressure jets installed in descaling units, which are located prior to deformation to avoid oxide imprint on the steel surface. Removal of the oxide layer depends on the velocity and amount of the water, as well as the fo

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25

Cortés, Guillermo Ruperto Martín, Wildor Theodoro Hennies, Carlos Tadeu Lauand, and Francisco Rolando Valenzuela-Díaz. "Dimension Stone Cutting with AWJ Methods." Materials Science Forum 498-499 (November 2005): 482–87. http://dx.doi.org/10.4028/www.scientific.net/msf.498-499.482.

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The application of high-pressure abrasive water jets (AWJ) has evolved quickly in some fields of engineering. At Polytechnic School, University of São Paulo, one application has particular interest that is the cutting of friable materials, as rock and ceramics. The main aspect in this field is the cut at the beneficiation process of end product in dimension stone plates. How much the cut of plates, by different kind of AWJ methods, was the research of a PhD work of one of the authors. The abrasive water jet equipment, installed in the Laboratory of Rock Mechanics of the Mining and Petroleum En

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26

Schroll, Michael, Christian Willert, Marcel Matha, Christian Morsbach, and Robin Brakmann. "Improved Impingement Cooling Using Flow Enhancing Structural Elements." Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics 21 (July 8, 2024): 1–24. http://dx.doi.org/10.55037/lxlaser.21st.176.

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This investigation is part of a study seeking to improve impingement cooling in internal combustion turbomachinery using flow modifying elements within the cooling channel. A simplified geometry of a jet impingement cooling configuration is chosen for well-defined numerical simulations and complementary experiments. The generic cooling channel setup features of a square cross-section that is closed on one end and is supplied by 9 inline jets that are directed toward a heated plate. Using RANS, the presence of an arc-conic placed immediately downstream of each jet nozzle was found to increase t

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27

Alghamdi, Bahaj, Blunden, and Wu. "Dust Removal from Solar PV Modules by Automated Cleaning Systems." Energies 12, no. 15 (2019): 2923. http://dx.doi.org/10.3390/en12152923.

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Dust accumulation on solar photovoltaic (PV) modules reduces light transmission from the outer surfaces to the solar cells reducing photon absorption and thus contributing to performance reduction of PV systems. In regions such as the Middle East where dust is prevalent and rainfall is scarce, remedial measures are needed to reduce such impacts. Currently, various techniques are being employed to address such sand soiling ranging from mechanical (brushing) to active and passive electrical interventions. This research focuses on mechanical approaches encompassing module vibration, air and water

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28

Mathews, Logan T., and Kent L. Gee. "Methods for predicting overall sound power and maximum overall sound pressure levels from heated supersonic jets, including rockets." Journal of the Acoustical Society of America 158, no. 1 (2025): 371–79. https://doi.org/10.1121/10.0037192.

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Prior work [e.g., McInerny (1992). Noise Control Eng. J. 38(1), 5–16; McInerny (1996). J. Aircraft 33(3), 511–517; Franken (1958). Noise Control 4(3), 8–16] has resulted in models for estimating overall sound power levels (OAPWLs) and maximum overall sound pressure levels (OASPLmax) from jet and rocket engines. Based on fundamental flow properties, this paper builds on previous results and presents simple methods for predicting OAPWL and OASPLmax from heated supersonic jets and rockets. A method for estimating ground effects on OASPLmax is also presented. The model's performance is evaluated f

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29

Starostin, I. I., and A. V. Bondarenko. "Use of Turboprop Fans with the Device for Intensification of Aeration of Open Pits for Ventilation of Mined-Out Space." Herald of the Bauman Moscow State Technical University. Series Mechanical Engineering, no. 4 (139) (December 2021): 138–51. http://dx.doi.org/10.18698/0236-3941-2021-4-138-151.

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The application of open-pit fans on the basis of turboprop aircraft engines, working in complex with the devices for intensification of aeration of worked-out space, for ventilation of open-pit mines is considered. The most effective for the open-pit mines ventilation is the use of isothermal jets created by the mine fans with gas-turbine aviation engines. The principle design of the device for intensification of open pits airing represents inclined profiled blades installed on supports. Such a design allows to direct the developed ventilation jet into the quarry, as well as to increase its ve

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30

Righini, Simona, Pietro Cassaro, Uwe Bach, et al. "Update on the Multi-Frequency Monitoring of Blazars with Medicina and Noto." Proceedings of the International Astronomical Union 14, S342 (2018): 234–36. http://dx.doi.org/10.1017/s1743921318007962.

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AbstractThe Medicina and Noto radiotelescopes have been employed for over 14 years to monitor the flux density variations of a vast sample of blazars at different radio frequencies. Radio data are essential components of blazar spectral energy distribution (SED, spanning from radio waves to gamma rays), whose trend with luminosity and shape changes provide decisive information on the physics of extra-galactic jets and, eventually, on the mechanism extracting energy from the central black hole in radio-loud AGN. Observations presently carried out at 5, 8 and 24 GHz have taken advantage of the c

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31

Klest, Henry T. "A Compact TPC for the sPHENIX Experiment." Journal of Physics: Conference Series 2374, no. 1 (2022): 012147. http://dx.doi.org/10.1088/1742-6596/2374/1/012147.

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The sPHENIX detector to be installed at RHIC in 2022 is designed to precisely measure jets, jet correlations, and dilepton pairs in heavy-ion collisions. With these measurements in mind, sPHENIX will employ a compact TPC covering 20cm < r < 78 cm and |η| < 1.1 as the central tracker. Utilizing an optimized Ne-CF4 gas mixture, zigzag readout pads, a 1.4 T solenoid, and a modified SAMPA chip for streaming readout, the TPC will provide a position resolution sufficient for measuring target observables in a high event rate environment. The sPHENIX TPC, with some modifications, could be a m

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32

Rausch, Thomas, Beatriz Cañadillas, Oliver Hampel, et al. "Wind Lidar and Radiosonde Measurements of Low-Level Jets in Coastal Areas of the German Bight." Atmosphere 13, no. 5 (2022): 839. http://dx.doi.org/10.3390/atmos13050839.

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For wind energy, the knowledge of the available wind resource is essential. Therefore, specific wind phenomena at the altitude range of wind turbines are currently the focus of investigations. One such specific feature is the low-level jet (LLJ). The article analyses LLJ properties at two locations in the German Bight: A wind lidar system for measuring wind profiles at heights from 50 m to 500 m a.g.l. (above ground level) was first installed at the offshore island of Heligoland, Germany, and then at the coastal island of Norderney, Germany, for one year. The LLJ is defined here as a maximum h

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33

Shakouchi, Toshihiko, and Shunsuke Fukushima. "Fluidic Thrust, Propulsion, Vector Control of Supersonic Jets by Flow Entrainment and the Coanda Effect." Energies 15, no. 22 (2022): 8513. http://dx.doi.org/10.3390/en15228513.

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Thrust, propulsion, vector control of supersonic jets has been applied to jet and rocket engines, ejectors, and other many devices. In general, there are two approaches to this type of control, namely mechanical moving systems and fluidic thrust vector control systems without moving parts, with mechanical moving systems being the most common. However, generally speaking, these systems are very complicated, and more simple methods and devices are desired. In this study, an extremely simple method for the thrust vector control of a supersonic jet by a fluidic Coanda nozzle (FC-nozzle) using the

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34

Shakerin, Said. "Water on Fire." Mechanical Engineering 128, no. 01 (2006): 34–36. http://dx.doi.org/10.1115/1.2006-jan-3.

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Engineers and artists have teamed to create combinations of fire and water that have dazzled people at tourist attractions, festivals, and the Olympic Games. At the University of the Pacific in Stockton, California, mechanical engineering professor Ed Pejack and student Eric Eubanks designed a small-scale fountain for educational and demonstration purposes, adapting parts used in irrigation and a camping fuel can. Alan Robinson and Mark Fuller invented a fountain that illuminates water jets with colored flames. Kiki Pettit, a computer programmer, has designed, built, and installed water founta

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35

Gierke, Alexander, Claudia Goy, Andreas Schmidt, et al. "A liquid jet sample environment for experiments on liquids at MID (EuXFEL)." Journal of Physics: Conference Series 3010, no. 1 (2025): 012151. https://doi.org/10.1088/1742-6596/3010/1/012151.

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Abstract An experimental setup for liquid jet applications was implemented at the Materials Imaging and Dynamics Instrument (MID) of the European XFEL. This setup is operated in the multi-purpose experimental chamber of MID at pressures down to 10−5 mbar. The motion of the nozzle was realized in three dimensions for alignment purposes and the investigation of liquids at different states of supercooling. For this purpose, an active nozzle temperature control is implemented and a catcher system has been installed to capture the liquid after passing the interaction region to maintain good vacuum

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36

Choi, C. E., C. W. W. Ng, D. Song, et al. "Flume investigation of landslide debris–resisting baffles." Canadian Geotechnical Journal 51, no. 5 (2014): 540–53. http://dx.doi.org/10.1139/cgj-2013-0115.

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Landslide debris is a common occurrence in mountainous regions around the world that can potentially result in disastrous consequences to downstream facilities. Flow-impeding structures are often constructed along the flow path to impede this hazardous phenomenon. Baffles are a type of flow-impeding structure regularly installed using empirical and prescriptive design methods as the interaction mechanism and the influence of baffle configuration on flow impedance is not well understood. A series of flume experiments were carried out to investigate flows characterizing landslide debris impactin

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Kolegaev, Mykhaylo, and Igor Brazhnik. "Improvement of the process of preparing cargo tanks of crude oil tankers for cargo operations." Technology audit and production reserves 6, no. 1(80) (2024): 36–40. https://doi.org/10.15587/2706-5448.2024.318534.

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The object of research is the process of inerting the cargo tank of an oil tanker. Issues related to improving the process of preparing cargo tanks of oil tankers for cargo operations are considered. It is noted that the efficiency of oil tanker operation, in addition to transport operations, is determined by the technologies used during the preparation of the vessel for receiving new cargo. One of such technologies is the inerting cargo tanks, which precedes any cargo operations. The study was aimed at improving the inert flue gas system by using a new technology for supplying jets of inert g

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Vance, Fredrick, and Jared Young. "Design, development, and validation of acoustic insulation packages for business and VIP aircraft." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 264, no. 1 (2022): 800–809. http://dx.doi.org/10.3397/nc-2022-813.

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The owners of private airplanes have high expectations when it comes to the comfort inside the cabin. The interior of a business jet is crafted to feel like a luxurious office space where its occupants can focus on their work or relaxation without the distractions or fatigue caused by excessive wind, engine, or mechanical noise while in flight. Choosing the right Thermal Acoustic Insulation System (TAIS) to accomplish this goal is most often a balancing act between competing priorities such as system weight, ease of installation, cost, and acoustic performance. Here, we will describe our metho

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Olaveson, Tyce W., and Kent L. Gee. "Multiple wavepacket source decomposition methods applied to an F404 engine noise source." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A63. http://dx.doi.org/10.1121/10.0026813.

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Characterizing jet noise sources is an important part of noise reduction efforts. Many equivalent source models (ESMs) derived from inverse methods lack a compelling physical interpretation. Connecting the source model to flow properties is an important part of understanding noise radiation methods. Wavepackets are coherent, spatiotemporal structures observed in jet turbulence. Mathematical expressions describing wavepackets have been used in modal decompositions of the turbulent flow. Similar structures appear in frequency domain ESMs and these methods have been applied to create physically m

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Yao, Xiongliang, Zhaoyu Qu, Guihui Ma, Nana Yang, Xiaobo Quan, and Shaohua Cheng. "Experimental Study on Motion Characteristics of Cavity Attached to the Tail of Underwater Vehicle." Journal of Marine Science and Engineering 11, no. 7 (2023): 1287. http://dx.doi.org/10.3390/jmse11071287.

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The formation and development of an attached cavity at the tail of an underwater moving vehicle involves a complex multiphase flow, which determines the load characteristics and motion stability of the vehicle. In this study, an experimental method was used to explore the formation process and motion characteristics of the cavity at the tail of the vehicle, and a pressure sensor installed at the tail of the model was used to establish the relationship between the evolution of the tail attachment cavity and transient pressure. The study found that the process of pulling and breaking the attache

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Xia, Jingxi. "Fluid dynamics study on flight performance improvement of morphing winglets on jetliners." Applied and Computational Engineering 59, no. 1 (2024): 199–203. http://dx.doi.org/10.54254/2755-2721/59/20240802.

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Winglets are structures with unique shapes designed on the wingtips of aircraft. They were first time justified as a device that can improve aircraft fuel efficiency by generating more lift in the last century and have been widely used in the aviation industry until today. The current winglets installed on jetliners, however, are fixed, resulting in that winglets can only be aerodynamically optimized for single flight condition. Searching for further improvement on flight performance, this paper investigates and analyzes two types of morphing winglets that can adjust their configurations durin

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Cai, Changyou, Ming Zhao, Minggang Shen, Yuhua Pan, Xin Deng, and Chunyang Shi. "Physical and Numerical Simulation Study on Structure Optimization of the Inner Wall of Submerged Entry Nozzle for Continuous Casting of Molten Steel." Processes 11, no. 11 (2023): 3237. http://dx.doi.org/10.3390/pr11113237.

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The submerged entry nozzle (SEN) plays an important role in the continuous casting production process. It is a cast refractory pipe fitting installed in the lower part of the tundish and inserted below the molten steel level of the mold. It not only affects the speed of molten steel flow, but is also prone to nodules and affects production. In the present work, the flow behavior of molten steel in a traditional nozzle and that in a new type of nozzle whose inner wall was distributed with arrays of hemispherical crowns were studied by means of both physical simulation (using a water model) and

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Astafiev, Aleksandr M., Aleksandr M. Altmark, Nikita A. Lesiv, and Alexander S. Chirtsov. "Diagnostics of Atmospheric Plasma Jets of Helium and Argon Barrier Discharge in a Cylindrical Microwave Cavity Resonator." Journal of the Russian Universities. Radioelectronics 26, no. 3 (2023): 122–35. http://dx.doi.org/10.32603/1993-8985-2023-26-3-122-135.

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Introduction. Technologies related to the use of low-temperature atmospheric plasmas are developing at a rapid pace. Creation of new low-temperature plasma sources for specific applications requires monitoring of dynamic processes in such discharges with a high time resolution. Electron concentration is one the most important plasma characteristics, which can be very low for a low-temperature atmospheric pressure plasma. However, the methods currently available for diagnostics of gas-discharge plasmas are either characterized by insufficient sensitivity or unable to monitor dynamic processes i

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ТАРАСЕНКО, В. Ф., Н. П. ВИНОГРАДОВ, Е. Х. БАКШТ, Д. А. СОРОКИН, and Д. С. ПЕЧЕНИЦИН. "Bright areas of radiation in low-pressure air when diffuse plasma jets meet." Optika atmosfery i okeana 37, no. 4(423) (2024): 294–301. http://dx.doi.org/10.15372/aoo20240405.

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Исследуется свечение плазменных диффузных струй (ПДС), которые позволяют моделировать в атмосферном воздухе низкого давления некоторые свойства красных спрайтов – импульсных разрядов, наблюдаемых в верхних слоях атмосферы Земли на высотах 40–100 км. ПДС инициировались плазмой импульсно-периодического емкостного разряда, создаваемой в кварцевой трубке между двумя внешними электродами, и распространялись одновременно в противоположные стороны. Для формирования ПДС, которые двигались навстречу друг другу, использовались две пары кольцевых электродов, установленных на расстоянии 66 см. При подаче

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Hagiwara, Yoshiaki, Kazuhiro Hada, Mieko Takamura, Tomoaki Oyama, Aya Yamauchi, and Syunsaku Suzuki. "Demonstration of Ultrawideband Polarimetry Using VLBI Exploration of Radio Astrometry (VERA)." Galaxies 10, no. 6 (2022): 114. http://dx.doi.org/10.3390/galaxies10060114.

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We report on recent technical developments in the front- and back-ends for the four 20 m radio telescopes of the Japanese Very-Long-Baseline Interferometry (VLBI) project, VLBI Exploration of Radio Astrometry (VERA). We present a brief overview of a dual-circular polarization receiving and ultrawideband (16 Giga bit s−1) recording systems that were installed on each of the four telescopes operating at 22 and 43 GHz bands. The wider-band capability improves the sensitivity of VLBI observations for continuum emission, and the dual-polarization capability enables the study of magnetic fields in r

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Li, Ang, Hongjiang Cui, Ying Guan, Jichen Deng, Ying Zhang, and Wu Deng. "Study on Aerodynamic Drag Reduction by Plasma Jets for 600 km/h Vacuum Tube Train Sets." Machines 11, no. 12 (2023): 1078. http://dx.doi.org/10.3390/machines11121078.

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In order to break through the speed bottleneck, researchers envision using tubes to cover high-speed maglev trains and extract some of the air inside the tubes, creating a low-density environment on the ground, greatly reducing the aerodynamic drag of the trains, and in a relatively economical and feasible way, making high subsonic (600 km/h and above) and even supersonic ground transportation possible. The faster the running speed of high-speed trains, the greater the impact of aerodynamic drag on their energy consumption. Studying the aerodynamic characteristics of trains with a speed of 600

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Pinheiro Rulli, Ricardo, Fernando Dotta, and Paulo Anchieta da Silva. "Flight Tests Performed by EMBRAER with SHM Systems." Key Engineering Materials 558 (June 2013): 305–13. http://dx.doi.org/10.4028/www.scientific.net/kem.558.305.

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This paper presents an overview of a set of tests performed by Embraer with two different SHM technologies in an E-Jets flight tests aircraft. Considered as promising technologies for monitoring structural parts, sensors networks including cables and connectors of CVM (Comparative Vacuum Monitoring) and LW (Lamb Waves) were installed in an Embraer-190 aircraft. The two technologies have been investigated by Embraer within the companys effort on Structural Health Monitoring. Scheduled maintenance and inspection activities can take advantage of the SHM technologies by evaluating the structural i

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Alpigiani, Cristiano. "Explore the Lifetime Frontier with MATHUSLA." EPJ Web of Conferences 182 (2018): 02004. http://dx.doi.org/10.1051/epjconf/201818202004.

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Many extensions of the Standard Model (SM) include particles that are neutral, weakly coupled, and long-lived that can decay to final states containing several hadronic jets. Long-lived particles (LLPs) can be detected as displaced decays from the interaction point, or missing energy if they escape. ATLAS and CMS have performed searches at the LHC and significant exclusion limits have been set in recent years. However, the current searches performed at colliders have limitations. An LLP does not interact with the detector and it is only visible once it decays. Unfortunately, no existing or pro

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Hur, Shin, and Wan Doo Kim. "The Electrospinning Process and Mechanical Properties of Nanofiber Mats under Vacuum Conditions." Key Engineering Materials 326-328 (December 2006): 393–96. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.393.

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The structure and morphology of the electrospun nanofiber depend on the parameters such as the physical properties of polymer, the applied voltages, tip to collector distance and ambient condition. Until now, most of studies have been focused on the effects of the above mentioned parameters for electrospinning process. But the study on vacuum conditions in electrospinning process almost not exists. The goal of this study is to investigate the effects of vacuum conditions in electrospinning process. The setup of electrospinning device is installed within homemade vacuum chamber. The polymer jet

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Novotni, Gergely, and Viktor Józsa. "Sound Pressure Level Analysis of a Liquid-Fueled Lean Premixed Swirl Burner with Various Quarls." Acoustics 2, no. 1 (2020): 131–46. http://dx.doi.org/10.3390/acoustics2010010.

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Swirl burners are widely used in numerous practical applications since they are characterized by low pollutant emission and a wide operating range. Besides reliable operation, a burner must fulfill noise emission regulations, which is often a sound pressure level in dB(A) when people are affected. Therefore, the present paper evaluates the overall sound pressure level (OASPL) variation of a 15-kW liquid-fueled turbulent atmospheric swirl burner at various setups. Firstly, the combustion air flow rate was adjusted, which induced a swirl number modification due to the fixed swirl vanes. Secondly

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