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Artykuły w czasopismach na temat "Cavitation clouds"
Ahn, Byoung-Kwon, So-Won Jeong, Cheol-Soo Park i Gun-Do Kim. "An Experimental Investigation of Coherent Structures and Induced Noise Characteristics of the Partial Cavitating Flow on a Two-Dimensional Hydrofoil". Fluids 5, nr 4 (3.11.2020): 198. http://dx.doi.org/10.3390/fluids5040198.
Pełny tekst źródłaLi, Lidong, Yan Xu, Mingming Ge, Zunce Wang, Sen Li i Jinglong Zhang. "Numerical Investigation of Cavitating Jet Flow Field with Different Turbulence Models". Mathematics 11, nr 18 (19.09.2023): 3977. http://dx.doi.org/10.3390/math11183977.
Pełny tekst źródłaWang, Hao, Jian Feng, Keyang Liu, Xi Shen, Bin Xu, Desheng Zhang i Weibin Zhang. "Experimental Study on Unsteady Cavitating Flow and Its Instability in Liquid Rocket Engine Inducer". Journal of Marine Science and Engineering 10, nr 6 (12.06.2022): 806. http://dx.doi.org/10.3390/jmse10060806.
Pełny tekst źródłaREISMAN, G. E., Y. C. WANG i C. E. BRENNEN. "Observations of shock waves in cloud cavitation". Journal of Fluid Mechanics 355 (25.01.1998): 255–83. http://dx.doi.org/10.1017/s0022112097007830.
Pełny tekst źródłaYuan, Miao, Yong Kang, Hanqing Shi, Dezheng Li i Hongchao Li. "Experimental Investigation on the Characteristic of Hydrodynamic-Acoustic Cavitation (HAC)". Journal of Marine Science and Engineering 10, nr 3 (22.02.2022): 309. http://dx.doi.org/10.3390/jmse10030309.
Pełny tekst źródłaSimon, Alex, Connor Edsall i Eli Vlaisavljevich. "Effects of pulse repetition frequency on bubble cloud characteristics and ablation for single-cycle histotripsy". Journal of the Acoustical Society of America 152, nr 4 (październik 2022): A247. http://dx.doi.org/10.1121/10.0016161.
Pełny tekst źródładel Campo, David, R. Castilla, GA Raush, PJ Gamez-Montero i E. Codina. "Pressure effects on the performance of external gear pumps under cavitation". Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, nr 16 (24.02.2014): 2925–37. http://dx.doi.org/10.1177/0954406214522990.
Pełny tekst źródłaCui, Yanyu, Manjun Zhao, Qingmiao Ding i Bin Cheng. "Study on Dynamic Evolution and Erosion Characteristics of Cavitation Clouds in Submerged Cavitating Water Jets". Journal of Marine Science and Engineering 12, nr 4 (10.04.2024): 641. http://dx.doi.org/10.3390/jmse12040641.
Pełny tekst źródłaYang, Yongfei, Wei Li, Weidong Shi, Ling Zhou i Wenquan Zhang. "Experimental Study on the Unsteady Characteristics and the Impact Performance of a High-Pressure Submerged Cavitation Jet". Shock and Vibration 2020 (16.06.2020): 1–15. http://dx.doi.org/10.1155/2020/1701843.
Pełny tekst źródłaHuang, Si, Yuxiong Hu, Yifeng Wei i Yushi Mo. "Analysis of Cavitation Flow Performance in Centrifugal Pump Using OpenFOAM". Journal of Physics: Conference Series 2610, nr 1 (1.10.2023): 012023. http://dx.doi.org/10.1088/1742-6596/2610/1/012023.
Pełny tekst źródłaRozprawy doktorskie na temat "Cavitation clouds"
Malan, Leon. "Direct numerical simulation of free-surface and interfacial flow using the VOF method : cavitating bubble clouds and phase change". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066555/document.
Pełny tekst źródłaDirect numerical simulation of two-phase ow is used extensively for engineering research and fundamental fluid physics studies [54, 81]. This study is based on the Volume-Of-Fluid (VOF) method, originally created by Hirt and Nicols [30]. This method has gained increased popularity, especially when geometric advection techniques are used coupled with a planar reconstruction of the interface [14, 89]. The focus of the first part of this work is to investigate the hydrodynamics of isothermal cavitation in large bubble clouds, which originated from a larger study of micro-spalling [61], conducted by the French CEA. A method to deal with volume-changing vapour cavities, or pores, was formulated and implemented in an existing code, PARIS . The ow is idealized by assuming an inviscid liquid, negligible thermal effects and vanishing vapour pressure. A novel investigation of bubble cloud interaction in an expanding liquid using direct or detailed numerical simulation is presented. The simulation results reveal a pore competition, which is characterised by the Weber number in the ow. In the second part of the study the governing equations are extended to describe incompressible ow with phase change [79]. The description of the work commences with the derivation of the governing equations. Following this, a novel, geometric based, VOF solution method is proposed. In this method a novel way of advecting the VOF function is invented, which treats both mass and energy conservation in conservative form. New techniques include the advection of the interface in a discontinuous velocity field. The proposed algorithms are consistent and elegant, requiring minimal modifications to the existing code. Numerical experiments demonstrate accuracy, robustness and generality. This is viewed as a significant fundamental development in the use of VOF methods to model phase change
Sivadon, Audrey. "Contributions à l’imagerie passive de la cavitation ultrasonore : formation de voies adaptatives en 3D et extension spatiale de nuages de bulles". Electronic Thesis or Diss., Lyon 1, 2022. http://www.theses.fr/2022LYO10172.
Pełny tekst źródłaPassive imaging relies on beamforming algorithms that require large aperture probes to provide good axial resolutions; however, in 3D passive imaging, the matrix probes currently marketed do not meet this constraint. Moreover, these probes have a large number of elements, which makes their use particularly unwieldy. This thesis work focuses on the study and improvement of passive cavitation imaging by addressing two aspects in particular: (i) the practical and efficient implementation of 3D passive imaging, (ii) the problem of imaging large sources such as cavitation clouds. We have combined the application of sparse methods (to reduce the number of active elements of the probe used) and the transposition from 2D to 3D of adaptive algorithms in the frequency domain. This formalism uses the robust estimation of the inter-spectral density matrix (CSM) and allowed us to implement simply and efficiently different algorithms: Delay-And-Sum (DAS), Robust-Capon-Beamformer and Pisarenko. The efficiency of these algorithms in 3D has been tested in terms of width to half height, contrast and position error, on a point source in simulations and on a point reflector in experiments. Finally, in order to address the reality of cavitation clouds, we have investigated the behavior of these reconstruction methods in the case of extended sources. Our 2D simulations show the evolution of the reconstructed images as a function of the cavitation cloud characteristics. This work provides a concrete solution for a simple implementation of 3D passive imaging as well as answers to the expectations on the localization and characterization of a cavitation cloud
Reisman, Garrett Erin Brennen Christopher E. "Dynamics, acoustics and control of cloud cavitation on hydrofoils /". Diss., Pasadena, Calif. : California Institute of Technology, 1997. http://resolver.caltech.edu/CaltechETD:etd-03302004-140539.
Pełny tekst źródłaWright, Michael Marshall. "Cavitation of a Water Jet in Water". BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3175.
Pełny tekst źródłaGeng, Linlin. "Numerical investigation and modelling of the unsteady behavior and erosion power of cloud cavitation". Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/671490.
Pełny tekst źródłaLa cavitació de núvol és un fenomen no desitjat que té lloc en moltes màquines hidràuliques que danya les superfícies de les parets sòlides a causa de l'agressivitat erosiva induïda pel procés de col·lapse. Per tant, és necessari predir amb precisió l'ocurrència de la cavitació de núvol i quantificar-ne la intensitat d¿erosió per millorar el disseny i ampliar el cicle de vida de les màquines i sistemes existents. L'aplicació de la simulació numèrica (CFD) ofereix l'oportunitat de predir la cavitació inestable. Per a això, és de suma importància investigar com seleccionar els models més adequats per obtenir els resultats més precisos d'una manera eficient i com relacionar el col·lapse de les estructures de vapor amb el seu poder erosiu. En l'estudi actual, s'ha avaluat la influència dels diferents models de turbulència i s'ha millorat el rendiment dels models de cavitació. La relació entre el comportament inestable i el seu caràcter erosiu també s'ha considerat implementant un model d'erosió. Per a l'avaluació dels models de turbulència, s'han emprat tres models de turbulència Unsteady Reynolds Average Navier-Stokes (URANS) per simular la cavitació de núvol al voltant d'un perfil hidràulic NACA65012 en vuit condicions hidrodinàmiques diferents. Els resultats indiquen que el model Shear Stress Transport (SST) pot captar millor el comportament de la cavitat inestable que els models k-e i RNG si la resolució de la malla propera a la paret és prou bona. Per millorar els models de cavitació, s'ha investigat primerament la influència de les constants empíriques del model de Zwart en la dinàmica de la cavitat. Els resultats mostren que el comportament de la cavitat és sensible a la seva variació i, per tant, es proposa un rang òptim que pot proporcionar una millor predicció de la fracció de volum de vapor i del pic de pressió instantània generat pel col·lapse de la cavitat principal del núvol. En segon lloc, s'han corregit els models originals de cavitació de Zwart i Singhal tenint en compte el terme de segon ordre de l'equació de Rayleigh-Plesset. L'efectivitat dels models originals i dels corregits s'ha comparat per a dos patrons de cavitació diferents. Els resultats per una cavitat fixa demostren que el model corregit prediu millor la distribució de la pressió a la regió de tancament de la cavitat i la longitud de la cavitat en comparació amb les observacions de l'experiment. Els resultats per la cavitació de núvol inestable també confirmen que la predicció de la freqüència de despreniment es pot millorar amb el model Zwart corregit. Per a la investigació del poder erosiu de la cavitació, s'ha emprat un model d'erosió basat en el balanç energètic. S'ha comprovat que la distribució espacial i temporal de l'agressivitat de l'erosió és sensible a la selecció del model de cavitació i a la pressió motriu del col·lapse. En particular, l'ús de nivells mitjans de pressió combinats amb el model de cavitació de Sauer permeten obtenir resultats fiables. S'han observat dos mecanismes d'erosió, un que es produeix a la regió de tancament de la cavitat principal de la làmina caracteritzada per col·lapses de baixa intensitat però amb alta freqüència, i l'altre induït pel col·lapse de la cavitat de núvol que presenta una alta intensitat d'erosió però amb baixa freqüència. Finalment, s'ha comprovat que la intensitat de l'erosió segueix una llei de potència amb la velocitat de flux principal amb exponents que oscil·len entre 3 i 5 segons el paràmetre d'estimació que s'utilitzi.
Malan, Leon. "Direct numerical simulation of free-surface and interfacial flow using the VOF method: cavitating bubble clouds and phase change". Doctoral thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/27898.
Pełny tekst źródłaLyu, Xiuxiu [Verfasser], Xiangyu [Akademischer Betreuer] Hu, Xiangyu [Gutachter] Hu, Julija [Gutachter] Zavadlav i Chaouki [Gutachter] Habchi. "Numerical Modeling and Simulation of Cavitation Bubble Cloud with a Lagrangian–Eulerian Approach / Xiuxiu Lyu ; Gutachter: Xiangyu Hu, Julija Zavadlav, Chaouki Habchi ; Betreuer: Xiangyu Hu". München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1215837682/34.
Pełny tekst źródłaZhang, Guangjian. "Etude expérimentale de la structure et de la dynamique des écoulements cavitants". Thesis, Paris, HESAM, 2020. http://www.theses.fr/2020HESAE050.
Pełny tekst źródłaCavitation is a complex phenomenon involving mass transfer between liquid and vapour phase at nearly constanttemperature. Advances in the understanding of the physical processes of cavitating flows are challenging, mainlydue to the lack of quantitative experimental data on the two-phase structures and dynamics inside the opaquecavitation areas. In this thesis, partial cavitation developed in small convergent-divergent (Venturi) channels wasstudied experimentally in detail for a better knowledge of the physical mechanisms governing the cavitationinstabilities. This was achieved by using an ultra-fast synchrotron X-ray imaging technique aided withconventional high speed photography and Particle Image Velocimetry. The main contributions of the presentstudy can be summarized as follows: (1) detailed description of the two-phase flow structures in quasi-stablesheet cavitation, which is characterized by a low-speed re-entrant flow existing continuously underneath thecavity; (2) analysis of the complex effect of cavitation on turbulent velocity fluctuations; (3) identification ofthree distinct mechanisms responsible for the transition of sheet-to-cloud cavitation, with a discussion of thedifferences between them; (4) analysis of the scale effect on cavitation in the studied Venturi flows
Wang, Yi-Chun. "Shock waves in bubbly cavitating flows. Part I. Shock waves in cloud cavitation. Part II. Bubbly cavitating flows through a converging-diverging nozzle". Thesis, 1996. https://thesis.library.caltech.edu/804/1/Wang_yc_1996.pdf.
Pełny tekst źródłaReisman, Garrett Erin. "Dynamics, acoustics and control of cloud cavitation on hydrofoils". Thesis, 1997. https://thesis.library.caltech.edu/1201/1/Reismen_ge_1997.pdf.
Pełny tekst źródłaCzęści książek na temat "Cavitation clouds"
Hutli, E. A. F., i M. S. Nedeljkovic. "Formula for Upstream Pressure, Nozzle Geometry and Frequency Correlation in Shedding/Discharging Cavitation Clouds Determined by Visualization of Submerged Cavitating Jet". W New Trends in Fluid Mechanics Research, 194–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-75995-9_58.
Pełny tekst źródłaDe Lange, D. F., i G. J. De Bruin. "Sheet Cavitation and Cloud Cavitation, Re-Entrant Jet and Three-Dimensionality". W In Fascination of Fluid Dynamics, 91–114. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-4986-0_7.
Pełny tekst źródłaChahine, Georges L., Chao-Tsung Hsiao i Reni Raju. "Scaling of Cavitation Bubble Cloud Dynamics on Propellers". W Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction, 345–72. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8539-6_15.
Pełny tekst źródłaYamamoto, Katsuhiro. "Investigation of Bubble Clouds in a Cavitating Jet". W Mathematical Fluid Dynamics, Present and Future, 349–73. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-56457-7_12.
Pełny tekst źródłade Lange, D. F., G. J. de Bruin i L. van Wijngaarden. "Observations of cloud cavitation on a stationary 2D profile". W Fluid Mechanics and Its Applications, 241–46. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0938-3_22.
Pełny tekst źródłaPelz, Peter F., Thomas Keil i Gerhard Ludwig. "On the Kinematics of Sheet and Cloud Cavitation and Related Erosion". W Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction, 221–37. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8539-6_9.
Pełny tekst źródłaPeng, Guoyi, Yasuyuki Oguma i Seiji Shimizu. "Visualization Observation of Cavitation Cloud Shedding in a Submerged Water Jet". W Fluid-Structure-Sound Interactions and Control, 229–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48868-3_37.
Pełny tekst źródłaPetrov, N., i A. Schmidt. "Evolution of a Cloud of Cavitation Bubbles in a Disturbed Compressible Liquid: A Numerical Study". W 30th International Symposium on Shock Waves 2, 1251–55. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-44866-4_80.
Pełny tekst źródłaChiekh, Maher Ben, Jean-Christophe Béra, Adrien Poizat, Claude Inserra i Bruno Gilles. "Dynamics of a Cavitation Cloud Generated by Pulsed Focused Ultrasound: Study of the Re-initialization of the Cloud at a New Pulse". W Green Energy and Technology, 571–87. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8278-0_37.
Pełny tekst źródłaWang, Changchang, Guoyu Wang i Biao Huang. "Coherent Structures Analysis Across Cavity Interface in Cloud Cavitating Flows Using Different Vortex Identification Methods". W Springer Proceedings in Physics, 393–403. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8955-1_27.
Pełny tekst źródłaStreszczenia konferencji na temat "Cavitation clouds"
Sou, Akira, Shinichi Nitta i Tsuyoshi Nakajima. "Bubble Tracking Simulation of Cavitating Flow in an Atomization Nozzle". W ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31018.
Pełny tekst źródłaSato, Keiichi, Naoya Takahashi i Yasuhiro Sugimoto. "Effects of Diffuser Length on Cloud Cavitation in an Axisymmetrical Convergent-Divergent Nozzle". W ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-05507.
Pełny tekst źródłaHosangadi, A., i V. Ahuja. "A New Unsteady Model for Dense Cloud Cavitation". W ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77485.
Pełny tekst źródłaCeccio, Steven L., i Darin L. George. "An Electrical Impedance Method for Measurements of Attached Cavitation". W ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0790.
Pełny tekst źródłaWosnik, Martin, Qiao Qin, Damien T. Kawakami i Roger E. A. Arndt. "Large Eddy Simulation (LES) and Time-Resolved Particle Image Velocimetry (TR-PIV) in the Wake of a Cavitating Hydrofoil". W ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77467.
Pełny tekst źródłaKawakami, Damien T., Qiao Qin i Roger Arndt. "Water Quality and the Periodicity of Sheet/Cloud Cavitation". W ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77114.
Pełny tekst źródłaD.Maxwell, Adam, i Zhen Xu. "Inception of Cavitation Microbubble Clouds in Tissue-Mimicking Media during Histotripsy". W 8th International Symposium on Cavitation. Singapore: Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-2826-7_269.
Pełny tekst źródłaLu, Yuan, Joseph Katz i Andrea Prosperetti. "Generation and Transport of Bubble Clouds in High-Intensity Focused Ultrasonic Fields". W 8th International Symposium on Cavitation. Singapore: Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-2826-7_052.
Pełny tekst źródłaMaxwell, Adam D., Charles A. Cain, J. Brian Fowlkes i Zhen Xu. "Inception of cavitation clouds by scattered shockwaves". W 2010 IEEE Ultrasonics Symposium (IUS). IEEE, 2010. http://dx.doi.org/10.1109/ultsym.2010.5935897.
Pełny tekst źródłaAhuja, Vineet, i Ashvin Hosangadi. "Simulations of Cavitation in Orifice and Venturis". W ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26639.
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