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Journal articles on the topic 'Cavitational impact'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Jasionowski, Robert, Dariusz Zasada, and Wojciech Polkowski. "The Evaluation of the Cavitational Damage in MgAl2Si Alloy Using Various Laboratory Stands." Solid State Phenomena 252 (July 2016): 61–70. http://dx.doi.org/10.4028/www.scientific.net/ssp.252.61.

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Evaluation of cavitation erosion resistance of is carried out by using various testing stands, that differ by the way of cavitation excitation and its intensity. These various testing conditions have led to a standardization of some part of laboratory stands, that in turn allows a direct comparison of results obtained in different laboratories. The aim of this study was to determine the course of cavitational destruction of MgAl2Si alloy samples tested on three different laboratory stands. The research was conducted on a vibration stand according to ASTM G32, where cavitation is forced by the

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2

Jasionowski, R., W. Polkowski, and D. Zasada. "Destruction Mechanism of ZnAl4 as Cast Alloy Subjected to Cavitational Erosion Using Different Laboratory Stands." Archives of Foundry Engineering 16, no. 1 (2016): 19–24. http://dx.doi.org/10.1515/afe-2015-0096.

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Abstract The main reason of a cavitational destruction is the mechanical action of cavitation pulses onto the material’s surface. The course of cavitation destruction process is very complex and depends on the physicochemical and structural features of a material. A resistance to cavitation destruction of the material increases with the increase of its mechanical strength, fatigue resistance as well as hardness. Nevertheless, the effect of structural features on the material’s cavitational resistance has been not fully clarified. In the present paper, the cavitation destruction of ZnAl4 as cas

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3

Jasionowski, Robert, Wojciech Polkowski, and Dariusz Zasada. "The Destruction Mechanism of Titanium Subjected to Cavitation Erosion." Key Engineering Materials 687 (April 2016): 117–22. http://dx.doi.org/10.4028/www.scientific.net/kem.687.117.

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A cavitation erosion is the process based on an impact of pressure pulses on a material’s surface caused by the phenomenon of cavitation. The term cavitation is defined as a phenomenon of formation, growth and disappearance (implosion) of bubbles due to cyclic pressure variations in a liquid. The cavitation initiators are embryos (cavitation nuclei with a size up to 50 μm), located in the water or on wetted surfaces that lead to decreasing of the liquid ability to transfer tensile stresses. The role of embryos is played by micro gas bubbles, fine solid particles, micro-organisms or gas-filled

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4

Jasionowski, R., D. Przetakiewicz, and W. Przetakiewicz. "Cavitation Erosion Resistance of Alloys Used in Cathodic Protection of Hulls of Ships." Archives of Metallurgy and Materials 59, no. 1 (2014): 241–45. http://dx.doi.org/10.2478/amm-2014-0039.

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Abstract Seawater is an aggressive environment which causes the necessity of using corrosion protection of hulls of ships. Cathodic protection is an effective prevention method which has been applied in this area for many years. In this method, potential of the ship’s hull is reduced by using galvanic anodes (so-called protectors), which are additionally exposed to cavitation erosion. Results of cavitation erosion resistance investigation of alloys commonly used in cathodic protection of hulls of ships, are presented in this paper. The tests were carried out on the three, most often applied ma

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Dushenko, Nikita V., Sergey A. Voropaev, Ekaterina A. Ponomareva, et al. "CAVITATIONAL SYNTHESIS OF CARBON NANOFORMS BY WATER HAMMER." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 59, no. 9 (2018): 80. http://dx.doi.org/10.6060/tcct.20165909.4y.

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We consider features of the carbon composite nano-particles formation at cavitation by means of the hydro impact. The comparison of given method with existing methods of synthesis in nanotechnology was carried out. The crystal structure of the various carbon nanoforms synthesized by hydrodynamic cavitation in a mixture of water and isopropyl alcohol was investigated using the methods of electron diffraction. Such polymorphs of carbon as the nano-diamond, nanographite and composites were revealed. The lattices characteristics of the synthesized carbon nano forms were analyzed. Applications of r

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6

Norkin, M. V. "Free Cavitational Deceleration of a Circular Cylinder in a Liquid after Impact." Journal of Applied and Industrial Mathematics 12, no. 3 (2018): 510–18. http://dx.doi.org/10.1134/s1990478918030110.

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Norkin, M. "Mathematical model of cavitational braking of a torus in the liquid after impact." Matematicheskoe modelirovanie, no. 8 (2018): 116–30. http://dx.doi.org/10.31857/s023408790001179-0.

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8

Momin, Rahat F., Kalyani R. Deshmukh, and Parag R. Gogate. "Degradation of Procion Golden Yellow H-R Dye Using Ultrasound Combined with Advanced Oxidation Process." Water 16, no. 16 (2024): 2344. http://dx.doi.org/10.3390/w16162344.

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The current study aims to degrade Procion Golden Yellow H-R through ultrasound-induced cavitation coupled with various oxidants. A comprehensive investigation was conducted to examine the impact of parameters, specifically pH, power, and frequency, on the extent of degradation. The primary aim was to optimize degradation by solely utilizing a cavitation reactor where only 23.8% degradation was observed under the established optimum conditions of pH 2.5, frequency of 22 kHz, and power of 200 W. The investigation of the combined process of cavitation with H2O2, Fenton reagent (H2O2/Fe2+), NaOCl,

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9

Zasada, Dariusz, Wojciech Polkowski, and Robert Jasionowski. "Analysis of the Effect of the Wearing Type on Surface Structural Changes of Ni₃Al-Based Intermetallic Alloy." Solid State Phenomena 225 (December 2014): 25–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.225.25.

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Results of an analysis of effect of wearing type on surface structural changes of a Ni3Al intermetallic alloy, are shown in the present paper. A microstructure evaluation was carried out by Quanta 3D FEG field emission gun scanning electron microscope (FEG SEM) equipped with an integrated EDS/WDS/EBSD system. The Ni3Al-based intermetallic alloy with an addition of boron, zirconium and chromium was examined. The investigated material had γ’ single-phase, ordered solid solution structure with 20 μm grain size. An electron backscatter diffraction (EBSD) method was applied to visualize surface str

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10

Norkin, M. V. "Cavitational braking of a cylinder with a variable radius in a fluid after impact." Vestnik Udmurtskogo Universiteta. Matematika. Mekhanika. Komp'yuternye Nauki 29, no. 2 (2019): 261–74. http://dx.doi.org/10.20537/vm190209.

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11

Norkin, M. V. "Mathematical Model of a Post-Impact Cavitational Deceleration of a Torus in a Liquid." Mathematical Models and Computer Simulations 11, no. 2 (2019): 301–8. http://dx.doi.org/10.1134/s2070048219020121.

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12

Ocheretanyi, S. A., and V. V. Prokof’ev. "Effect of Cavitator and Nozzle Parameters on the Efficiency job of the impulse Jet Generator." Известия Российской академии наук. Механика жидкости и газа, no. 5 (September 1, 2023): 10–24. http://dx.doi.org/10.31857/s1024708422600981.

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Studies of fluid jet flows in the presence of a ventilated cavity with a negative cavitation number, carried out at the Institute of Mechanics of Moscow State University, showed that under certain conditions, self-cavitational oscillations with a high intensity of pressure pulsations occur in such a hydraulic system. It was shown that it is possible in principle to use the self-oscillation regime to create periodic impulsed jets during outflow from a converging nozzle into the atmosphere. The influence of the parameters of the cavitator and the outlet nozzle on the intensity of the impact of t

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13

Herceg, I. L., A. R. Jambrak, D. Šubarić, et al. "Texture and pasting properties of ultrasonically treated corn starch." Czech Journal of Food Sciences 28, No. 2 (2010): 83–93. http://dx.doi.org/10.17221/50/2009-cjfs.

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The effects of high power ultrasound of 24 kHz and ultrasound bath of 24 kHz frequency on the textural and pasting properties of corn starch suspensions was examined. Suspensions were treated with different intensities and treatment times (15 min and 30 min) using an ultrasound probe set and bath. The treatments with high power ultrasound probes caused a significant lowering of the starting gelatinisation temperatures of corn starch. The ultrasound treatment caused disruption of starch granules by cavitational forces and made the granules more permeable to water. The highest viscosity was obse

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14

Rudenko, M. G., and M. I. Vasiltsov. "ANALYSIS OF RESIDUES AS METHOD FOR THE FORMALIZATION OF CHANGES IN COMPOSITION WINTER DIESEL FUEL AFTER CAVITATIONAL IMPACT." Scientific Papers Collection of the Angarsk State Technical University 1, no. 1 (2018): 40–43. http://dx.doi.org/10.36629/2686-7788-2018-1-1-40-43.

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15

Rudenko, Mihail, and Mark Vasil'cov. "ANALYSIS OF RESIDUES AS METHOD FOR THE FORMALIZATION OF CHANGES IN COMPOSITION WINTER DIESEL FUEL AFTER CAVITATIONAL IMPACT." Scientific Papers Collection of the Angarsk State Technical University 2018, no. 1 (2020): 40–43. http://dx.doi.org/10.36629/2686-7788-2018-1-40-43.

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16

Norkin, Mikhail Viktorovich. "Formation of Additional Cavitational Zones at Vertical Impact of the Circular Cylinder which is Completely Shipped in Liquid." UNIVERSITY NEWS. NORTH-CAUCASIAN REGION. NATURAL SCIENCES SERIES, no. 1 (2016): 26–31. http://dx.doi.org/10.18522/0321-3005-2016-1-26-31.

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17

Jambrak, A. R., T. J. Mason, L. Paniwnyk, and V. Lelas. "Ultrasonic effect on pH, electric conductivity, and tissue surface of button mushrooms, Brussels sprouts and cauliflower." Czech Journal of Food Sciences 25, No. 2 (2008): 90–99. http://dx.doi.org/10.17221/757-cjfs.

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The aim of this work was to use ultrasound pre-treatment as a potential method prior to the subsequent processing in the food industry, for button mushrooms, Brussels sprouts, and cauliflower in order to observe the impact of ultrasound on the vegetable surrounding media properties in the processing conditions. The samples treated with 20 kHz probe and 40 kHz bath for 3 and 10 min were compared with blanched (80&deg;C/3 min) and untreated samples. The effect was followed of ultrasound and blanching treatments on pH, electrical conductivity, and temperature changes. The effect of ultrasound

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18

Martínez, R. Fernando. "Organic sonochemistry: A chemist's timely perspective on mechanisms and reactivity." Journal of Organic Chemistry 86, no. 20 (2021): 13833–56. https://doi.org/10.1021/acs.joc.1c00805.

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Sonochemistry, the use of sound waves, usually within the ultrasonic range (>20 kHz), to boost or alter chemical properties and reactivity constitutes a long-standing and sustainable technique that has, however, received less attention than other activation protocols despite affordable setups. Even if unnecessary to underline the impact of ultrasound-based strategies in a broad range of chemical and biological applications, there is considerable misunderstanding and pitfalls regarding the interpretation of cavitational effects and the actual role played by the acoustic field. In this Perspe

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19

Skrygin, Oleg, Vladislav Smolentsev, and Anton Schednov. "The Mass Transfer Intensification of Combined Treatment Products." MATEC Web of Conferences 297 (2019): 01002. http://dx.doi.org/10.1051/matecconf/201929701002.

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The paper addresses the issues, related to mass transfer of treatment products when using combined forming methods with the application of an electric field. The impact of process components upon strength characteristics of parts has been shown. We have discovered the dependence of allowance removal rate upon the quality of preparation of the reference workpiece surface. The article describes the available industrial and newly developed methods of mass transfer intensification, using the original kinematics of movement, the improvement of the geometrical shape, the position of electrode-tools

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20

Nasibullayev, I. Sh, and E. Sh Nasibullaeva. "Investigation of the cavitational stability of an aluminum piston surface based on a three-dimensional model." Proceedings of the Mavlyutov Institute of Mechanics 12, no. 2 (2017): 143–51. http://dx.doi.org/10.21662/uim2017.2.021.

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The problem of determining the optimal material for manufacturing the surface of a movable element (piston) is considered, which has an increased resistance to cavitation failure, in order to justify the expediency of using structural materials for the manufacture of pistons in fuel automatics elements. On the basis of three-dimensional numerical modeling of the elasticity equations, the conditions under which a cavitation bubble collapse on the surface of a piston made of various structural materials can lead to irreversible deformations of the piston. The pressure acting on the piston determ

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21

Родионова, Anastasiya Rodionova, Новикова, and Galina Novikova. "Electric pasteurizer of milk." Vestnik of Kazan State Agrarian University 8, no. 3 (2013): 80–83. http://dx.doi.org/10.12737/1353.

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There were designed, manufactured and tested in a production a setting for disinfection of milk by exposure of physical factors, which has a new design concept of the working part in the form of a cylindrical cavity resonator, coupled to a reservoir of the ultrasonic generator, located in the shielding enclosure. The technological scheme of milk pasteurization in the developed electric pasteurizer comprises the steps of: supplying milk into the cavity, dielectric heating milk in a cylindrical cavity; the heating of milk due to the impact of the regional flow of electromagnetic field of microwa

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22

Kim, Seong Jong, Min Su Han, and Seung Jun Lee. "Effect of Zn Primer Coating on Electrochemical Properties in Seawater." Advanced Materials Research 811 (September 2013): 46–53. http://dx.doi.org/10.4028/www.scientific.net/amr.811.46.

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Conventional ships generated almost no cavitation erosion because they traveled at low speed. Thus, most ships have used painting, ICCP and sacrificial anode system. However, with the activation of international trading, and the increase of low-price, large-volume cargos, ships are becoming larger and faster. As a result, damages due to cavitations and corrosions have accelerated. Cavitation and erosion corrosions cause damages to materials by physical shock waves generated from the collapse of bubbles which are generated when the moving parts rotate in seawater. The stern in particular is exp

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23

H. A. Hamid, Ahmad, Azmi A. Matali, Z. A. Ghaffar, and S. Kasolang. "Cavitation in Internal Flows of Liquid Jet Through a Throat." Jurnal Kejuruteraan 35, no. 6 (2023): 1419–26. http://dx.doi.org/10.17576/jkukm-2023-35(6)-14.

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The interaction of a liquid with the surrounding air produces unstable waves that disintegrate the liquid into droplets, which is known as liquid atomization. The common internal flow of a liquid atomization nozzle experiences a single-phase flow but might turn into a multiphase flow with the existence of cavitation. Cavitation in internal flow has gotten a lot of attention because of the positive and negative consequences it can have depending on the application. One such advantageous result is that cavitation has been used to promote the atomization of liquid jets by causing gas bubbles in t

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24

Guo, Xiaomei, Shidong Yang, Xiaojun Li, Liang Shi, Ertian Hua, and Zuchao Zhu. "The Tip Clearance Cavitation Mechanism of a High-Speed Centrifugal Pump with a Splitter-Bladed Inducer." Processes 9, no. 9 (2021): 1576. http://dx.doi.org/10.3390/pr9091576.

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For a high-speed centrifugal pump, cavitation occurs easily. To equip a high-performance splitter-bladed inducer upstream of the pump is an effective method to suppress cavitation. In this paper, an external characteristics experiment of the high-speed centrifugal pump with a splitter-bladed inducer is carried out, and the corresponding numerical calculations are completed. The research shows that the results of the numerical calculation are credible. Numerical cavitation calculations under eight different tip clearance conditions are carried out. First, it is found that the tip clearance (TC)

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Savkina, R. K. "Properties of the crystalline silicon strained via cavitation impact." Semiconductor Physics Quantum Electronics and Optoelectronics 16, no. 1 (2013): 43–47. http://dx.doi.org/10.15407/spqeo16.01.043.

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26

Tang, Siah Ying, Manickam Sivakumar, and Billa Nashiru. "Impact of osmotic pressure and gelling in the generation of highly stable single core water-in-oil-in-water (W/O/W) nano multiple emulsions of aspirin assisted by two-stage ultrasonic cavitational emulsification." Colloids and Surfaces B: Biointerfaces 102 (February 2013): 653–58. http://dx.doi.org/10.1016/j.colsurfb.2012.08.036.

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27

Soyama, Hitoshi. "Laser Cavitation Peening and Its Application for Improving the Fatigue Strength of Welded Parts." Metals 11, no. 4 (2021): 531. http://dx.doi.org/10.3390/met11040531.

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During conventional submerged laser peening, the impact force induced by laser ablation is used to produce local plastic deformation pits to enhance metallic material properties, such as fatigue performance. However, a bubble, which behaves like a cavitation, is generated after laser ablation, known as “laser cavitation.” On the contrary, in conventional cavitation peening, cavitation is generated by injecting a high-speed water jet into the water, and the impacts of cavitation collapses are utilized for mechanical surface treatment. In the present paper, a mechanical surface treatment mechani

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28

Sharma, Krati, M. Chethana, Vinay Bhandari, Laxmi Gayatri Sorokhaibam, Vivek Ranade, and Deepak Killedar. "Conceptualizing Cavigulation Methodology by Integrating Cavitation and Coagulation and Application to Dye Wastewater Treatment." Journal of ISAS 1, no. 3 (2023): 49–76. http://dx.doi.org/10.59143/isas.jisas.1.3.gkjq9031.

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The present work provides a proof of concept for a new hybrid process, cavigulation, by combining cavitation and coagulation and its application to dye wastewater treatment. Both acoustic and hydrodynamic cavitations were evaluated. Removal of a commonly used dyes such as Congo red was investigated by cavigulation in the concentration range of 50 to 500 ppm. A broad spectrum of coagulants including two inorganic coagulants; poly aluminium chloride, iron (III) chloride, and natural biocoagulants derived from Moringa oleifera, Cicer arietinum and Acanthocereus tetragonus were employed to substan

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29

Maurin, Artur. "Numerical Analysis of Cavitation Erosion in 316L Steel with CrN PVD Coating." Materials 17, no. 17 (2024): 4397. http://dx.doi.org/10.3390/ma17174397.

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The erosion process of a 4 μm monolayer CrN coating deposited on 316L stainless steel due to cavitation was investigated using finite element analysis (FEA). To estimate load parameters from cavitation pit geometry resulting from high impact velocity and high strain rate, the explicit dynamic solver was employed. Water microjet impacts at velocities of 100, 200 and 500 m/s were simulated to recreate different cavitation erosion intensities observed in the experiment. The resulting damage characteristics were compared to previous studies on uncoated 316L steel. The relationship between impact v

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30

Takakuwa, Osamu, Masaaki Nishikawa, and Hitoshi Soyama. "Suppression of Fatigue Crack Growth in Austenite Stainless Steel by Cavitation Peening." Key Engineering Materials 452-453 (November 2010): 641–44. http://dx.doi.org/10.4028/www.scientific.net/kem.452-453.641.

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Cavitation normally causes severe damage in hydraulic machinery such as pumps and turbines by the impact produced by cavitation bubbles collapsing. Although cavitation is known as a factor of erosion, Soyama et al. succeeded in utilizing impacts of cavitation bubble collapsing for surface modification by controlling cavitating jet in the same way as shot peening. The local plastic deformation caused by cavitation impact enhances the fatigue strength of metallic materials, and the surface modification technique utilizing cavitation impact is called “cavitation peening (CP)”. It is well known th

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31

Orekhov, Genrikh. "Cavitation in swirling flows of hydraulic spillways." E3S Web of Conferences 91 (2019): 07022. http://dx.doi.org/10.1051/e3sconf/20199107022.

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During operation of high-head hydraulic spillway systems, cavitation phenomena often occur, leading to destruction of structural elements of their flow conductor portions. The article is devoted to the study of erosion due to cavitation in the circulation flows of eddy hydraulic spillways, including those equipped with counter-vortex flow energy dissipators. Cavitation destructive effects depend on many factors: intensity consisting in the rate of decrease in the volume or mass of a cavitating body per unit of time, the stage of cavitation, geometric configuration of the streamlined body, the

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32

Franklin, Cole. "Impacts of Ionization Potentials and Megasonic Dispersion." Solid State Phenomena 145-146 (January 2009): 19–22. http://dx.doi.org/10.4028/www.scientific.net/ssp.145-146.19.

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It has been shown that megasonics can accelerate strip processes such as doped and plasma treated photoresist [1]. However, applied megasonic energy can also damage sensitive semiconductor devices. It was shown that adding a solvent such as IPA or lowering the temperature helps to control cavitation in semi-aqueous fluids [2]. Sonochemical reactions have been observed in various industries, however, there are no published observations in semiconductor cleaning. Ions may form in megasonic driven bubble collapse impacted by the characteristics of a gas or liquid that enters the bubble from the b

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33

Bo, Yang, He Jian, and Zhang Ao. "Research on Dynamic Response of Cylindrical Shell Structure Subjected to Underwater Explosion Considering Cavitation." Journal of Physics: Conference Series 2891, no. 7 (2024): 072017. https://doi.org/10.1088/1742-6596/2891/7/072017.

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Abstract When the underwater weapon explodes, not only the shock wave and bubble pulsation will cause damage to the ship, but also the collapse of the cavitation area. Firstly, tensile and SHPB tests were designed to investigate the strain rate strengthening effect of 921A steel under high speed impact and fit the C-S constitutive model. Then the finite element method is compared with the classical arithmetic example, and the simulation results coincide with the arithmetic example results. A finite element model of the cylindrical shell structure is established to consider the effects of cavit

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34

Soyama, Hitoshi, Kenichi Saito, and Masumi Saka. "Improvement of Fatigue Strength of Aluminum Alloy by Cavitation Shotless Peening." Journal of Engineering Materials and Technology 124, no. 2 (2002): 135–39. http://dx.doi.org/10.1115/1.1447926.

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Cavitation impact, which normally produces severe damage in hydraulic machinery, can be used to modify surfaces in the same way as shot peening. Cavitation impact enables the surface of a material to be peened without the use of shot, thus it is called cavitation shotless peening. As there are no solid body collisions occurring in this peening process, the roughness of the peened surface should be less than that produced by shot peening. This characteristic makes it suitable for peening soft metals. In order to demonstrate the improvement of the fatigue strength of aluminum alloy by this proce

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35

Dyussenov, K. M. "INFLUENCE OF THE IMPACT OF ACOUSTIC CAVITATION ON THE PHYSICAL AND CHEMICAL PROPERTIES OF WATER." Eurasian Physical Technical Journal 18, no. 1 (2021): 65–69. http://dx.doi.org/10.31489/2021no1/65-69.

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The article presents the results of an experimental study of the changing the ionic composition of water under the influence of acoustic cavitation. The effect of acoustic radiation on the physical and chemical properties of water was studied in the frequency range 20 Hz - 50 kHz. It is shown that the ultrasonic range leads to an increase in the concentration in the area of metal traces and affects the change in the pH of water. The mechanism of action of cavitation leads to a change in the structural characteristics of water. It is shown that one of the manifested effects of ultrasonic cavita

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36

Min, Wei, Hongyu Wang, Zhi Zheng, Dong Wang, Hong Ji, and YuBo Wang. "Visual experimental investigation on the stability of pressure regulating poppet valve." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 12 (2020): 2329–48. http://dx.doi.org/10.1177/0954406220905872.

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The unstable vibration of a poppet valve drastically fluctuates pressure which directly affects the stability, reliability and safety of a hydraulic system. The unstable vibration of the poppet and cavitation is studied using visual experiments. Experimental results show that for a poppet valve, an orifice at the front of the valve cavity, the compressibility of oil in the sensitive cavity will lead poppet to unstable vibrations. For poppet valve without orifice, the instable vibration appears as three states: impact valve seat, transition (impact or non-impact valve seat occurs randomly) and

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37

Esposito, Claudia, Johan Steelant, and Maria Rosaria Vetrano. "Impact of Cryogenics on Cavitation through an Orifice: A Review." Energies 14, no. 24 (2021): 8319. http://dx.doi.org/10.3390/en14248319.

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Cryogenic cavitation affects the operation of liquid propulsion systems during the first phase of a launch. Its effects within orifices or turbopumps can range from mild instabilities to catastrophic damages to the structures, jeopardizing the launch itself. Therefore, to ensure the proper designing of propulsion systems, cavitation phenomena cannot be neglected. Although hydrodynamic cavitation has been studied for decades, the impact of the nature of the fluid has been sparsely investigated. Therefore, this review, beginning from the basic concepts of cavitation, analyzes the literature dedi

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38

Fortes Patella, Regiane, and Jean-Luc Reboud. "A New Approach to Evaluate the Cavitation Erosion Power." Journal of Fluids Engineering 120, no. 2 (1998): 335–44. http://dx.doi.org/10.1115/1.2820653.

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The dynamic response of various materials exposed to liquid jet and pressure wave impacts was simulated making use of an elastoplastic solid model. Numerical pit profiles were compared to experimental ones produced in test materials by the cavitation of water, mercury, or sodium. It was found that a high pressure wave emission was the main factor contributing to the observed cavitation damage. A parametric study concerning the pressure wave phenomenon was proposed and some similarity laws were obtained. By using these laws, the corresponding impact hydrodynamic parameters can be deduced from t

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39

Kadivar, Ebrahim, Mazyar Dawoodian, Yuxing Lin, and Ould el Moctar. "Experiments on Cavitation Control around a Cylinder Using Biomimetic Riblets." Journal of Marine Science and Engineering 12, no. 2 (2024): 293. http://dx.doi.org/10.3390/jmse12020293.

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Experimental investigations were conducted to uncover the impact of cavitation control—through the use of biomimetic riblets on cavitating flows around a circular cylinder. First, the dynamics of cavitation in the flow behind a finite cylinder (without riblets) was unveiled by visualizing the cavitation clouds and measuring the lift force fluctuations acting on the cylinder. Second, in a significant step forward, a comprehensive explanation was provided for the cavitation control methods using two bio-inspired riblet morphologies positioned in different orientations and locations on the cylind

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40

Taillon, Gabriel, and Kazuyoshi Miyagawa. "Stochastic Impact Model : Poisson Processes and Copulas to Model Cavitation Erosion Impacts." International Journal of Fluid Machinery and Systems 12, no. 4 (2019): 418–29. http://dx.doi.org/10.5293/ijfms.2019.12.4.418.

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41

Luo, Jing, Weilin Xu, Jun Deng, Yanwei Zhai, and Qi Zhang. "Experimental Study on the Impact Characteristics of Cavitation Bubble Collapse on a Wall." Water 10, no. 9 (2018): 1262. http://dx.doi.org/10.3390/w10091262.

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As a hydrodynamic phenomenon, cavitation is a main concern in many industries such as water conservancy, the chemical industry and medical care. There are many studies on the generation, development and collapse of cavitation bubbles, but there are few studies on the variation of the cyclic impact strength on walls from the collapse of cavitation bubbles. In this paper, a high-speed dynamic acquisition and analysis system and a pressure measuring system are combined to study the impact of a cavitation bubble generated near a wall for various distances between the cavitation bubble and the wall

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Zhao, Di, Fuqiang Deng, and Lingxin Zhang. "Numerical investigation on the impact pressure induced by a cavitation bubble collapsing near a solid wall." Physics of Fluids 35, no. 4 (2023): 043315. http://dx.doi.org/10.1063/5.0145499.

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Cavitation erosion often occurs on the surface of many underwater applications, which can cause severe damage to materials and reduce their performance. Since the cause of erosion is the impact pressure induced by the collapse of an individual cavitation bubble near the wall, to make a better prediction and prevent the damage potential, in this paper, we carry out systematic investigations on the impact characteristics by direct numerical simulation using a vapor bubble model. The volume of fluid (VOF) method is adopted to capture the interface between the two phases. The numerical results sho

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Galindo, Eric J., Riley R. Flores, Ricardo Mejia-Alvarez, Adam M. Willis, and Michaelann S. Tartis. "Simultaneous High-Frame-Rate Acoustic Plane-Wave and Optical Imaging of Intracranial Cavitation in Polyacrylamide Brain Phantoms during Blunt Force Impact." Bioengineering 11, no. 2 (2024): 132. http://dx.doi.org/10.3390/bioengineering11020132.

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Blunt and blast impacts occur in civilian and military personnel, resulting in traumatic brain injuries necessitating a complete understanding of damage mechanisms and protective equipment design. However, the inability to monitor in vivo brain deformation and potential harmful cavitation events during collisions limits the investigation of injury mechanisms. To study the cavitation potential, we developed a full-scale human head phantom with features that allow a direct optical and acoustic observation at high frame rates during blunt impacts. The phantom consists of a transparent polyacrylam

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Wang, Wei, Qingdian Zhang, Tao Tang, Shengpeng Lu, Qi Yi, and Xiaofang Wang. "Numerical study of the impact of water injection holes arrangement on cavitation flow control." Science Progress 103, no. 1 (2019): 003685041987774. http://dx.doi.org/10.1177/0036850419877742.

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A method of water injection to flow field using distributed holes on the suction surface of hydrofoil is presented in this article to control cavitation flow. Modified renormalization group k–ε turbulence model is coupled with full-cavitation model to calculate periodical cavitation patterns and the dynamic characteristics of the NACA66(MOD) hydrofoil. Water injection is found to be highly effective for cavitation suppression. The cavitation suppression effect of distributed regulation of jet holes and porosities along three-dimensional spanwise hydrofoil is also investigated. The appropriate

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Galindo, Eric J., and Michaelann Tartis. "Acoustic plane wave detection of intracranial cavitation in a polyacrylamide human head model under blunt impact." Journal of the Acoustical Society of America 153, no. 3_supplement (2023): A66. http://dx.doi.org/10.1121/10.0018183.

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Traumatic brain injuries (TBIs) occur in everyday life in the form of blunt impacts, while military personnel experience a combination of blast and blunt impacts from explosives. Damage mechanisms in TBIs, including cavitation, are poorly understood due to the inability to optically monitor brain deformation inside the skull during collisions. To overcome these limitations, high frame rate acoustic plane wave imaging in conjunction with high-speed optical imaging were combined to visualize intracranial cavitation during impact of a transparent brain phantom. The full-scale phantom was composed

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Soyama, Hitoshi, and Mitsuhiro Mikami. "Improvement of Fatigue Strength of Stainless Steel by Using a Cavitating Jet with an Associated Water Jet in Water." Key Engineering Materials 353-358 (September 2007): 162–65. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.162.

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Peening method using cavitation impacts have been developed. In this peening method, cavitation bubbles were generated by a cavitating jet. In order to increase peening intensity, a low speed water jet was injected around a cavitating jet, as the water jet swept away residual bubbles, which weaken the cavitation impact. In the present paper, improvement of fatigue strength of stainless steel by using a cavitating jet with an associated water jet was investigated compared with the results of conventional cavitating jet. It was concluded that the cavitating jet with an associated water jet can p

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Han, Wei, Zitian Xu, Yingjian Hao, Jiale Ren, Wangxu Li, and Zhenye Gu. "Study on the Dynamic Characteristics of the Impact Loads in a Near-Wall Double-Cavitation Bubble Collapse." Processes 11, no. 6 (2023): 1805. http://dx.doi.org/10.3390/pr11061805.

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Cavitation and cavitation erosion are complex hydrodynamic behaviors that significantly influence the stability and reliability of pumping units in aerospace and navigation power systems, hydraulic engineering, and other fields. Studies on cavitation have primarily and heavily focused on the collapse of multiple cavitation bubbles; understanding the movement of multiple cavitation bubbles is important for cavitation research. In this study, the collapse process of near-wall double-cavitation bubbles was numerically simulated and experimentally verified, and the evolution of the near-wall doubl

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Li, Qiang, and Lin Lu. "Numerical Investigations of Cavitation Nose Structure of a High-Speed Projectile Impact on Water-Entry Characteristics." Journal of Marine Science and Engineering 8, no. 4 (2020): 265. http://dx.doi.org/10.3390/jmse8040265.

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In this study, a detailed analysis of the influences of cavitation nose structure of a high-speed projectile on the trajectory stability during the water-entry process was investigated numerically. The Zwart-Gerber-Belamri (Z-G-B) cavitation model and the Shear Stress Ttransport (SST)k-ω turbulence model based on the Reynolds Averaged Navier–Stokes (RANS) method were employed. The numerical methodology was validated by comparing the numerical simulation results with the experimental photograph of cavitation shape and the experimental underwater velocity. Based on the numerical methodology, the

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Lu, Lin, Xinglin Yang, and Yike Bai. "Numerical simulation analysis of spiral cavitation heat generator." Journal of Physics: Conference Series 2826, no. 1 (2024): 012005. http://dx.doi.org/10.1088/1742-6596/2826/1/012005.

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Abstract A spiral cavitation heat generator is a new type of cavitation device. This article simulates and analyzes the spiral cavitation heat generator, uses Solidwork software to model, and the FLUENT software to simulate and calculate the distribution of flow field, temperature, and turbulent kinetic energy inside the spiral cavitation generator. When the outlet pressure is constant, the inlet pressure has an impact on the cavitation flow field, and within a certain range, the inlet pressure increases. The higher the maximum vapor content in the cavitation zone, the better the cavitation pe

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Nishigaki, Akari, Mihoko Maruyama, Shun-ichi Tanaka, et al. "Metastable Crystallization by Drop Impact." Crystals 12, no. 8 (2022): 1104. http://dx.doi.org/10.3390/cryst12081104.

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It has been reported that cavitation bubbles (air–liquid interface) by femtosecond laser and ultrasonic irradiations are effective for metastable phase crystallization in polymorph control. It has also been noted that cavitation bubbles are generated by mechanical shock when dropping a vial. Here we describe the crystallization of acetaminophen by drop impact. In the condition where spontaneous nucleation did not occur, the drop impact produced the metastable form (form II) and trihydrate. This supports the potency of the air–liquid interface in metastable phase formation. Furthermore, crystal

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