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Journal articles on the topic 'Cavitation in hydrodynamic machine'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

KOSTIUK, N., A. HORDEEV, and О. HORDEEV. "A GROUND OF PARAMETERS OF COMPENSATIVE RESILIENT SYSTEM OF OSCILLATION MACHINE IS WITH ECCENTRIC PERSON OCCASION." Herald of Khmelnytskyi National University. Technical sciences 291, no. 6 (2020): 73–78. https://doi.org/10.31891/2307-5732-2020-291-6-73-78.

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The greatest technological interest is attracted by hydrodynamic cavitation devices, in which a local pressure drop is formed in the flow of the processed liquid and hydrodynamic cavitation develops due to a sharp change in the geometry of the fluid flow. Increasing the time of periodic action of cavitation on a liquid medium gives a vibrational change in pressure in the pulsation chamber, which forms the generation of shock waves and leads to disinfection of water and intensification of its structural transformations. When creating designs of various machines, the task is always to achieve en

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Zakrzewska, D. E., and A. K. Krella. "Cavitation Erosion Resistance Influence of Material Properties." Advances in Materials Science 19, no. 4 (2019): 18–34. http://dx.doi.org/10.2478/adms-2019-0019.

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AbstractThe cavitation erosion is the phenomena that causes degradation of fluid flow machinery components due to repetitive implosion of cavitation bubbles adjacent to the solid surface. Cavitation erosion is a complex phenomenon, which includes not only hydrodynamic factors of liquid, but also properties of erodible material e.g. microstructure, hardness or Young modulus. In order to reduce the negative impact of erosion on machine components, there are many methods to increase cavitation erosion resistance. The paper discusses the correlations between structural and mechanical properties an

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3

Sedlář, Milan, Alois Koutný, Tomáš Krátký, Martin Komárek, and Martin Fulín. "Assessment of Cavitation Erosion Using Combined Numerical and Experimental Approach." Fluids 9, no. 11 (2024): 259. http://dx.doi.org/10.3390/fluids9110259.

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This paper aims to numerically assess the cavitation damage of hydrodynamic machines and hydraulic components and its development in time, based on cavitation erosion tests with samples of used materials. The theoretical part of this paper is devoted to the numerical simulation of unsteady multiphase flow by means of computational fluid dynamics (CFD) and to the prediction of the erosive effects of the collapses of cavitation bubbles in the vicinity of solid surfaces. Compressible unsteady Reynolds-averaged Navier–Stokes equations (URANS) are solved together with the Zwart cavitation model. To

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Ghiban, Brandusa, Carmen Anca Safta, and Vlad Motoiu. "Stainless Steels as Erosion Resistant Materials for Hydraulic Machines." Key Engineering Materials 750 (August 2017): 75–79. http://dx.doi.org/10.4028/www.scientific.net/kem.750.75.

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The corrosion phenomena lead to serious modifications in the structure of metallic materials from which are manufactured the important active components of hydraulic machines. There are two important types of corrosion: cavitation and silt erosion (abrasive erosion), that are specific to machines which are producing energy [1, 2, 3]. As a corrosion mechanism, in hydrodynamic cavitation [4, 5], when cavitation bubbles implode on the solid surface of hydraulic machine component, the local pressure developed is high and can exceed the fatigue strength, yield point or compression strength of the m

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Guo, Meng, Cheng Liu, Qingdong Yan, Wei Wei, and Boo Cheong Khoo. "The Effect of Rotating Speeds on the Cavitation Characteristics in Hydraulic Torque Converter." Machines 10, no. 2 (2022): 80. http://dx.doi.org/10.3390/machines10020080.

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Hydraulic torque converter is a kind of high speed rotating machine using viscosity hydraulic oil as working medium, and its internal flow field is very complex. Thereby cavitation can occur easily in the working process, resulting in severe degradation of torque converter performance, noise, vibration and even failure. In order to reveal the effect of rotating speeds on the cavitation characteristics, a full flow passage geometry and a computational fluid dynamics (CFD) model with cavitation were developed to analyze the flow behavior in the torque converter. The results show that cavitation

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Micu, Lavinia Madalina, Iosif Lazar, Adrian Circiumaru, Ilare Bordeasu, Liviu Daniel Pirvulescu, and mihai Hluscu. "New Results Regarding Cavitation Behavior of Polymers Modified with Anorganic Substances Coated on Bronze Surfaces." Materiale Plastice 55, no. 3 (2018): 460–63. http://dx.doi.org/10.37358/mp.18.3.5051.

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Due to mechanical resistance characteristics, chemical corrosion and abrasive erosion resistance, the polymers are more widely used in equipments and installations that are exploited in different fluid hydrodynamic conditions. Among these applications there is the protection of surfaces of hydromechanic organs stressed by cavitation, like in hydraulic machines rotors and valves. Consequently, the research aimes the extension of using these and protection of other components surfacess hardly streesed by cavitation. The research in this paper points toward the behavior of modified polymer layer,

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Ibrar, Burhan, Volker Wittstock, Joachim Regel, and Martin Dix. "Influence of Lubrication Cycle Parameters on Hydrodynamic Linear Guides through Simultaneous Monitoring of Oil Film Pressure and Floating Heights." Lubricants 12, no. 8 (2024): 287. http://dx.doi.org/10.3390/lubricants12080287.

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Hydrodynamic linear guides in machine tools offer a high load capacity and excellent damping characteristics, improving stability, precision, and vibration reduction. This study builds on previous research where floating heights were verified with a simulation model limited to measured floating heights. Advancements include incorporating pressure sensors into a fixed steel rail, enabling simultaneous measurement of oil film pressure and floating heights for a comprehensive understanding of lubrication conditions within the lubrication gap. The experimental results explore the effects of differ

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Marcalík, Patrik, Lukáš Zavadil, Milada Kozubková, and Jana Jablonská. "Inducer with Variable Pitch." EPJ Web of Conferences 269 (2022): 01035. http://dx.doi.org/10.1051/epjconf/202226901035.

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This paper deals with CFD incorporation in a process of designing inducer with variable pitch. The introductory part is devoted to the theory of centrifugal pumps, cavitation and inducer itself followed by a description of the mathematical models of turbulence, multiphase fluid and cavitation. The main part of this paper consists of CFD evaluation, first, of inducer itself, later in application with centrifugal pump with regards to cavitation properties with and without the aplication of inducer, for interest, the comparison with different type of inducer, with constatnt pitch, is also include

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Efremova, K. D., and V. N. Pilgunov. "Glycerin-containing Working Fluids for Hydraulic Drives for Special Purposes." Radio Engineering, no. 6 (December 26, 2020): 1–16. http://dx.doi.org/10.36027/rdeng.0620.0000182.

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The cavitation properties of a liquid must be taken into account in the engineering design of hydraulic machines and devices for hydraulic automation in cases when in their working process the absolute pressure in the liquid may drop below atmospheric, and the liquid is in a rarefied state for a certain time. Cold boiling, which occurs at a relatively low temperature and reduced absolute pressure inside or on the surface of the liquid, is considered as hydrostatic cavitation, if the liquid is stationary, or as hydrodynamic cavitation, if the liquid enters conditions under which the velocity he

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Usman, Ali, and Cheol Woo Park. "Numerical optimization of surface texture for improved tribological performance of journal bearing at varying operating conditions." Industrial Lubrication and Tribology 70, no. 9 (2018): 1608–18. http://dx.doi.org/10.1108/ilt-10-2017-0286.

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Purpose Journal bearings are used in numerous rotary machines. The load carrying capacity and friction of a bearing have been major concerns in design. Recent developments in surface texturing have showed potential outcomes to improve the tribological characteristics of mating surfaces. This study aims to investigate surface textures, which are transverse to the sliding direction, for frictional response of the journal bearing. Design/methodology/approach A hydrodynamic lubrication model is considered to evaluate the effect of surface texturing on the performance of a journal bearing at varyin

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11

Zhang, Yu, Guoding Chen, and Lin Wang. "Effects of thermal and elastic deformations on lubricating properties of the textured journal bearing." Advances in Mechanical Engineering 11, no. 10 (2019): 168781401988379. http://dx.doi.org/10.1177/1687814019883790.

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Hydrodynamic journal bearing is an important part of rotary machine and faces many challenges such as high rotating speed, heavy specific pressure, and large temperature rise with the development of industry. These challenges lead to notable thermal and elastic deformations of the journal bearing. Surface texture has been proved to be a valid method to promote bearing lubricating properties. However, effects of thermal and elastic deformations on lubricating properties of the textured journal bearing have not been clearly analyzed. Based on this, the article presents a method to transform ther

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Muchammad Muchammad, Mohammad Tauviqirrahman, Dhia Danu, Budi Setiyana, and J. Jamari. "Thermo-hydrodynamic Analysis of Multistep Journal Bearing using Computational Fluid Dynamics Simulation." CFD Letters 15, no. 12 (2023): 117–34. http://dx.doi.org/10.37934/cfdl.15.12.117134.

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Journal bearing is a machine element that is used to maintain the continuous rotation of the shaft on its axis. The rising demand for efficient and economical journal bearing applications has resulted in increased demand for high-speed machines. An increase in engine speed raises the distribution of pressure, temperature, and vapor volume fraction. Most of the research still only focuses on increasing pressure distribution and load-carrying capacity. However, the value of friction force, temperature distribution, and vapor volume fraction must also be considered such that the lubrication of th

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Denisov, Vyacheslav, Yuriy Kataev, and Anatoliy Korneev. "THEORETICAL PREREQUISITES FOR INTENSIFICATION OF HYDRODYNAMIC CLEANING OF EXTERNAL SURFACES OF MACHINES." Tekhnicheskiy servis mashin 62, no. 4 (2024): 64–69. https://doi.org/10.22314/2618-8287-2024-62-4-64-69.

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Jet cleaning is one of the most effective ways to remove contaminants due to the effect on the surface to be cleaned of the kinetic energy of a jet of washing liquid. (Research purpose) The research purpose is studying and identifying influence of hydrodynamic parameters of the washing liquid jet on the efficiency of the cleaning process. (Materials and methods) Established that the efficiency of hydrodynamic cleaning, in addition to the physico-chemical characteristics of the washing medium, depends on the optimal hydrodynamic parameters of the fl ow of the washing liquid fl owing out of the

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Ma, Chenbo, Yanjun Duan, Bo Yu, Jianjun Sun, and Qiaoan Tu. "The comprehensive effect of surface texture and roughness under hydrodynamic and mixed lubrication conditions." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 231, no. 10 (2017): 1307–19. http://dx.doi.org/10.1177/1350650117693146.

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A theoretical study is carried out to investigate the comprehensive effect of the machined roughness and fabricated textures, by solving the average Reynolds equation coupled with a mass-conservative cavitation algorithm and taking into account asperity contact. We analyzed the influence of surface roughness, which is represented by the combined root-mean-square roughness σ and surface pattern parameter γ on the optimum texture parameters including the dimple depth-over-diameter ratio and area density under hydrodynamic and mixed lubrication conditions. The results show that the effect of surf

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15

Susilowati, S., Novel Karaman, Muchammad, B. Setyana, Fernanda Surya Irawan, and Mohammad Tauviqirrahman. "CFD Analysis of Journal Bearing by Modifying The Roughness Surface." MATEC Web of Conferences 372 (2022): 08002. http://dx.doi.org/10.1051/matecconf/202237208002.

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A journal bearing is a machine part that is used to ensure that the shaft always rotates in the opposite direction of the axis. Journal bearings are chosen because they are well-suited for use in mechanical systems that demand precision, speed, and a high load capacity. Recent years have seen an increase in research on how to improve the tribological performance of bearings by considering the design/architecture of these bearings. Numerous scientists have developed numerous methods for measuring pressure distribution, load-carrying capacity, acoustic power level, force friction, and cavitation

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16

Botero-Herrera, Francisco Javier, Daniel Felipe Tobón-Espinosa, and Ricardo Moreno-Sánchez. "Everything you need to know before working with a pump as a turbine." Revista Facultad de Ingeniería, Universidad de Antioquia, no. 113 (September 5, 2024): 89–105. https://doi.org/10.17533/udea.redin.20240410.

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Electric power generation is one of the most relevant issues in recent decades. This energy can be obtained through non-renewable sources, renewable sources, and especially non-conventional renewable sources. Within this last category, we can classify the use of a Pump as a turbine (PAT). The pumps are hydraulic machines designed for energy expenditure. Thanks to being reversible machines, PATs can be used in their reverse mode of operation to extract valuable energy from the fluid. However, this use can generate some inconveniences in its process, ranging from assembly, characterization, and

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17

Zharkovskiy, Aleksandr A., Vasiliy A. Schur, and Omran Mohammad. "Prediction of energy and cavitation characteristics of high specific speed Francis hydraulic turbines." Izvestiya MGTU MAMI 16, no. 3 (2023): 225–34. http://dx.doi.org/10.17816/2074-0530-105208.

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BACKGROUND: Cavitation is a phenomenon that occurs in vane hydraulic machines: pumps, hydraulic turbines, when the pressure in a certain area of the flow reaches the level of saturated steam pressure. Its occurrence depends on the design and mode of operation of the hydraulic turbine. In order to design a hydraulic turbine with high cavitation qualities, it is necessary to be able to reliably predict this phenomenon. AIMS: The article describes approaches to modeling the operation of Francis hydraulic turbines based on the ANSYS software package. METHODS: Using quasi-3D methods was

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18

Yevhenii, Krupa, and Roman Demchuk. "COMPREHENSIVE REVIEW OF SOLIDWORKS AND ANSYS FOR HYDRAULIC MACHINERY DESIGN AND ANALYSIS." Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units, no. 2 (March 6, 2025): 48–53. https://doi.org/10.20998/2411-3441.2024.2.07.

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An in-depth analysis of current computer-aided design (CAD) and systems engineering analysis (CAE) software is presented, focusing on SolidWorks and ANSYS. Particular attention is paid to their use in the design and analysis of hydraulic machines, where these tools play an essential role in the development of turbines, pumps, and other components. SolidWorks stands out as the leading tool for creating 3D models of hydraulic assemblies, allowing engineers to optimize designs and reduce hydraulic losses early in the design process. In addition, SolidWorks offers a user-friendly interface and pow

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19

Hatakenaka, Kiyoshi, Masato Tanaka, and Kenji Suzuki. "A Theoretical Analysis of Floating Bush Journal Bearing With Axial Oil Film Rupture Being Considered." Journal of Tribology 124, no. 3 (2002): 494–505. http://dx.doi.org/10.1115/1.1454104.

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A new modified Reynolds equation is derived with centrifugal force acting on the hydrodynamic oil film being considered. This equation, together with a cavitation model, is used to obtain the steady-state equilibrium and calculate the rotordynamic coefficients of lightly loaded floating bush journal bearings operating at very high shaft speeds. The bush-to-shaft speed ratio and the linear cross-coupling spring coefficients of the inner oil film is found to decrease with the increase in shaft speed as the axial oil film rupture develops in the inner oil film. The present model can give reasonab

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20

Leighton, M., Nicholas Morris, Gareth Trimmer, Paul D. King, and Homer Rahnejat. "Efficiency of disengaged wet brake packs." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 6 (2018): 1562–69. http://dx.doi.org/10.1177/0954407018758567.

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Key objectives in off-highway vehicular powertrain development are fuel efficiency and environmental protection. As a result, palliative measures are made to reduce parasitic frictional losses while sustaining machine operational performance and reliability. A potential key contributor to the overall power loss is the rotation of disengaged wet multi-plate pack brake friction. Despite the numerous advantages of wet brake pack design, during high-speed manoeuvre in highway travel or at start-up conditions, significant frictional power losses occur. The addition of recessed grooves on the brake

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KORNEEV, V. M., YU V. KATAEV, and N. V. KORNEEV. "PROCESS OF SUBMERSIBLE CLEANING OF METAL SURFACES OF MACHINE PARTS." Tekhnicheskiy servis mashin 62, no. 3 (2024): 25–32. http://dx.doi.org/10.22314/2618-8287-2024-62-3-25-32.

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During the operation of agricultural machinery, contamination of various types and properties is deposited on the metal surfaces of parts, which can lead to increased wear of parts and a decrease in the operational reliability of machines as a whole. (Research purpose) The research purpose is studying the influence of the mechanical action of the cleaning solution on the efficiency of removing contaminations from the metal surfaces of machine parts. (Materials and methods) It was determined that the efficiency and quality of cleaning can be improved by increasing the intensity of the mechanica

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Papulov, Vladimir. "BUILDING A THREE-DIMENSIONAL MODEL OF AXIAL JET IN SOLIDWORKS." Interexpo GEO-Siberia 7 (2019): 76–79. http://dx.doi.org/10.33764/2618-981x-2019-7-76-79.

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The article provides a brief description of the construction of the main parts of the three-dimensional model of the axial water jet, followed by their Assembly into the finished product. The role of computer simulation in the design of complex types of propellers, which include water jet, is shown. The possibility of solving problems of hydrodynamics with the help of "SolidWorks"is demonstrated. The design of the water jet pipe, taking into account the absence of cavitation. The urgency of application of three-dimensional modeling in the field of shipbuilding, using CAD-programs of machine-bu

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23

Gavrilov, K. V., and V. S. Hudyakov. "Evaluation of friction losses in textured hydrodynamic tribo-units of piston machines. Part 2. Parametric studies of the ice connecting rod bearing." Bulletin of the South Ural State University series "Mechanical engineering industry" 22, no. 1 (2022): 24–35. http://dx.doi.org/10.14529/engin220102.

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One of the ways to reduce frictional losses is to use texturing of the friction surface. The use of texturing affects the formation of cavitation and turbulence zones, which is a poorly studied aspect in the modern literature. The texturing of the crankshaft liners can be in the form of elliptical microwells of various sizes. The previous part was devoted to the description of the methodology for modeling the hydrodynamic losses in the lubricating layer taking into account the phenomena of cavitation and turbulence and the analysis of scientific sources. The parameter of the dimensionless dist

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Ramos, Leandro Ito, Douglas Jhon Ramos, and Gregory Bregion Daniel. "Evaluation of textured journal bearings under dynamic operating conditions in rotating machinery." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 234, no. 6 (2019): 842–57. http://dx.doi.org/10.1177/1350650119887568.

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In order to obtain rotating machinery with improved energy efficiency, the approach of surface texturing journal bearings has been adopted to reduce the viscous dissipation in the lubricant. A possible reduction in shear viscous forces in the bearings of rotating machines could reduce the amount of heat released along its operation, resulting in a lower operating temperature that tends to improve journal bearings performance and the machine’s energetic efficiency. Thus, this work aims to investigate the texturing of journal bearings under dynamic loading conditions, considering the application

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Asomani, Stephen Ntiri, Jianping Yuan, Longyan Wang, Desmond Appiah, and Fan Zhang. "Geometrical effects on performance and inner flow characteristics of a pump-as-turbine: A review." Advances in Mechanical Engineering 12, no. 4 (2020): 168781402091214. http://dx.doi.org/10.1177/1687814020912149.

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A pump-as-turbine is a hydraulic machine that can operate as a pump and turbine at the same time. Pump-as-turbine happens to be the most appropriate method for meeting the world’s energy demands, particularly in rural and isolated areas of a country. Furthermore, the operating cost of microhydropower systems is lower compared to conventional hydrodynamic turbines, but it requires high initial investment. Pump-as-turbine has been applied in many engineering fields such as irrigation, sewage, reverse osmosis, water distribution systems, farms, small pump storage power house, and pressure droppin

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Kumar, P. S., and A. B. Pandit. "Modeling Hydrodynamic Cavitation." Chemical Engineering & Technology 22, no. 12 (1999): 1017–27. http://dx.doi.org/10.1002/(sici)1521-4125(199912)22:12<1017::aid-ceat1017>3.0.co;2-l.

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Deng, Jie, Ai He Wang, and Cai Wen Wang. "Experimental Investigation on Enhancive Effect of Hydrodynamic Cavitation." Advanced Materials Research 781-784 (September 2013): 2865–69. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2865.

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Based on the principle of hydraulics,an effective equipment of hydrodynamic cavitation is designed and built in this paper.The orifice plates with various geometry size were used as hydrodynamic cavitation generator to study the relation ship between many factor,such as,inlet pressure,discharge,flow speed in orifice,and the cavitation number.Analysis of water flow cavitation status for the experimental unit,this device can produce cavitation phenomenon.The methylene blue and spectrophotometer method can capture the free radicals generated successfully.This is an effective way to measuring the

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Deng, Jie, and Jun Zhou. "Experimental Study of the Porous Plate Hydrodynamic Cavitation Device and Removal the Algae in Water." Advanced Materials Research 800 (September 2013): 569–72. http://dx.doi.org/10.4028/www.scientific.net/amr.800.569.

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Design a practical and effective hydrodynamic cavitation experimental apparatus, the establishment of cavitation radical scavenging method, the use of methylene blue to study the relationship of the hydroxyl radical production and cavitation cavitation intensity, the study of the various factors of cavitation radical production, and to explore optimal cavitation strengthen the conditions. Hydrodynamic cavitation kill algae has some effect, there will be varying degrees of decline in the concentration of algae. The hydrodynamic cavitation algae suppression and damaging effects.

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Chambers, Sean D., Robert H. Bartlett, and Steven L. Ceccio. "Hemolytic Potential of Hydrodynamic Cavitation." Journal of Biomechanical Engineering 122, no. 4 (2000): 321–26. http://dx.doi.org/10.1115/1.1286560.

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The purpose of this study was to determine the hemolytic potentials of discrete bubble cavitation and attached cavitation. To generate controlled cavitation events, a venturi-geometry hydrodynamic device, called a Cavitation Susceptibility Meter (CSM), was constructed. A comparison between the hemolytic potential of discrete bubble cavitation and attached cavitation was investigated with a single-pass flow apparatus and a recirculating flow apparatus, both utilizing the CSM. An analytical model, based on spherical bubble dynamics, was developed for predicting the hemolysis caused by discrete b

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Nosov, V. R., J. C. Gómez-Mancilla, and J. A. Meda-Campaña. "Occurrence of hydrodynamic cavitation." Water Science and Technology 64, no. 3 (2011): 595–601. http://dx.doi.org/10.2166/wst.2011.608.

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In this paper, the conditions under which cavitation (or liquid film rupture) can or cannot occur in thin layers of moving liquid are derived for three typical cases. At the same time, expressions depending on geometrical and movement parameters, where cavitation might start, are given. The results are obtained using simple engineering terms, which can be used in cases whether it is necessary to avoid cavitation or to induce it.

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Farhat, M., A. Chakravarty, and J. E. Field. "Luminescence from hydrodynamic cavitation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 467, no. 2126 (2010): 591–606. http://dx.doi.org/10.1098/rspa.2010.0134.

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The majority of the research on cavitation luminescence has focused on the sonoluminescence or chemiluminescence generated by cavitation induced through ultrasound, with a lesser body of work on the luminescence induced by laser- or spark-induced cavitation. In such circumstances, the cavitation is generated in liquids where, on the broad scale, there is usually assumed to be no net liquid flow (although of course there are small-scale flows as a result of the cavitation itself, through radiation forces, streaming, microstreaming and turbulence). Little attention has been paid to the luminesce

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Fesenko, Anatolii, Yevheniia Basova, Vitalii Ivanov, Maryna Ivanova, Fatyma Yevsiukova, and Magomediemin Gasanov. "Increasing of Equipment Efficiency by Intensification of Technological Processes." Periodica Polytechnica Mechanical Engineering 63, no. 1 (2018): 67–73. http://dx.doi.org/10.3311/ppme.13198.

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Issues of technological processes’ intensification and increase of technological equipment efficiency are of priority value in the modern engineering. Application of various methods of hydrodynamic drag on the working fluids in rotary-wheel machines allows increasing of processing efficiency to receive finely-dispersed homogeneous mixtures with necessary characteristics. In this article the issues, connected with the liquid flows' formation in the working zone of rotary-cavitating activator are studied and the main principles of energy impact while the usage of rotor with radial channels, supp

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Lyu, Fengxia, Ming Tang, Faqi Zhou, Xintong Zhang, Saiyue Han, and Sheng Zhang. "Research on the Effect of Structural Parameters on Cavitation Performance of Shear Hydrodynamic Cavitation Generator." Applied Sciences 14, no. 9 (2024): 3676. http://dx.doi.org/10.3390/app14093676.

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The method of cavitation is increasingly applied in water environmental protection. Based on the numerical simulation method, a study on the structural parameters of the shear-type hydrodynamic cavitation generators for wastewater treatment is proceeded. The internal flow field is described by employing the mixed multiphase flow model and the Zwart cavitation model. Experiments were conducted by applying the wastewater from a dyeing factory as the medium. The degradation rate of COD in water characterizes the cavitation performance of the hydrodynamic cavitation generator, and the rationality

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Zieliński, Marcin, Paulina Rusanowska, Aleksandra Krzywik, Magda Dudek, Anna Nowicka, and Marcin Dębowski. "Application of Hydrodynamic Cavitation for Improving Methane Fermentation of Sida hermaphrodita Silage." Energies 12, no. 3 (2019): 526. http://dx.doi.org/10.3390/en12030526.

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Hydrodynamic cavitation was recently applied as a biomass pretreatment method. Most of the studies which used hydrodynamic cavitation were applied to pretreated sugarcane bagasse or reed. High biomass yield of Sida hermaphrodita points out the necessity of studies on its effective pretreatment before methane fermentation, especially because its “wood-like” characteristics could present different disintegration properties than other lignocellulose biomass. Thus, the aim of the study was to investigate the influence of duration of hydrodynamic cavitation on lignocellulose composition in Sida her

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Ran, Zilin, Wenxing Ma, and Chunbao Liu. "3D Cavitation Shedding Dynamics: Cavitation Flow-Fluid Vortex Formation Interaction in a Hydrodynamic Torque Converter." Applied Sciences 11, no. 6 (2021): 2798. http://dx.doi.org/10.3390/app11062798.

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Recent experiments have shown interactions between the cavitation and fluid vortex formation in a hydrodynamic torque converter. This study aimed to clarify the unsteady cavitation trigger mechanism and flow-induced vibration caused by turbulence–cavitation interactions. The mass transfer cavitation model and modified Reynolds-averaged Navier–Stokes k–ω model were used with a local density correction for turbulent eddy viscosity to investigate the cavitation structure in a hydrodynamic torque converter under various operating conditions. The model results were then validated against test data.

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Ye, Yu-Fang, Ying Zhu, Na Lu, Xin Wang, and Zhi Su. "Treatment of rhodamine B with cavitation technology: comparison of hydrodynamic cavitation with ultrasonic cavitation." RSC Advances 11, no. 9 (2021): 5096–106. http://dx.doi.org/10.1039/d0ra07727e.

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Kamyshatskyi, O., Ye Koroviaka, V. Rastsvietaiev, V. Yavorska, O. Dmytruk, and T. Kaliuzhna. "On the issue concerning improvement of a mud preparation technology at the expense of hydrodynamic cavitation." Collection of Research Papers of the National Mining University 69 (June 2022): 231–42. http://dx.doi.org/10.33271/crpnmu/69.231.

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Purpose is to improve the technology of drilling mud by applying hydrodynamic cavitation. Research methodology is represented by the theoretical and experimental studies of hydrodynamic cavitation, performed with the help of modern methods of analytical analysis and experimental studies, i.e. by using general principles of mathematical and physical modeling, methods of processing research results in EXCEL, SolidWorks for further analysis. Research results. Frequency of cavitation oscillations according to the parameters of a device for creating hydrodynamic cavitation has been calculated. The

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Wettmarshausen, Sören, Alexander Engels, Thomas Hagemann, et al. "An Experimentally Validated Cavitation Model for Hydrodynamic Bearings Using Non-Condensable Gas." Lubricants 13, no. 4 (2025): 140. https://doi.org/10.3390/lubricants13040140.

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Despite great research effort in recent decades, cavitation in hydrodynamic journal bearings is still a not completely understood phenomenon. In particular, it is unclear which proportions of different cavitation types are present in a bearing. Novel experimental results show a clear deviation from the predictions of hydrodynamic lubrication theory. This article presents a new approach for modeling cavitation in hydrodynamic bearings by using computational fluid dynamics with the volume of fluid method and a phase of non-condensable gas in the lubrication oil. The validation of the model is ac

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Song, Yuansen, and Shaoxian Bai. "Thermal Cavitation Effect on the Hydrodynamic Performance of Spiral Groove Liquid Face Seals." Materials 17, no. 11 (2024): 2505. http://dx.doi.org/10.3390/ma17112505.

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Cavitation in micro-scale lubricating film could be determined by the fluid’s thermal properties, which impacts the hydrodynamic lubrication capacity dramatically. This study aimed to novelly investigate the impact of the thermal cavitation effect on the hydrodynamic performance of liquid face seals, employing the compressible cavitation model, viscosity–temperature effect, and energy equation. The finite difference method was adopted to analyze the thermal cavitation by calculating the pressure and temperature profiles of the lubricating film. The working conditions and geometric configuratio

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Schmid, A. "MTBE degradation by hydrodynamic induced cavitation." Water Science and Technology 61, no. 10 (2010): 2591–94. http://dx.doi.org/10.2166/wst.2010.173.

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Hydrodynamic induced cavitation generates imploding cavitation bubbles which can lead to degradation or even mineralisation of water constituents without addition of any chemicals. This technology overcomes the problems of ultrasound irradiation by the local production of a cavitation cloud close to the sonotrodes. Hydrodynamic cavitation can be stabilised downstream of the nozzle depending on the ambient pressure conditions. If the pressure is kept low, the imploding cavitation bubbles generate new cavities, analogous to a chain reaction, and elevate the radical synthesis inside the apparatus

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Zeman, Radek, and Pavel Rudolf. "Hydrodynamic cavitation in minifluidic Venturi nozzle." EPJ Web of Conferences 299 (2024): 01041. http://dx.doi.org/10.1051/epjconf/202429901041.

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This article describes the design of a small Venturi nozzle for hydrodynamic cavitation wastewater treatment research. A water circuit powered by compressed air was set up for the experiment. The nozzle design allowed visualization of the cavitating flow directly in the nozzle using a high-speed camera. Experiments were carried out with the nozzle to obtain a visualization of the flow and the dependence of the loss coefficient on the cavitation number. Furthermore, computational modeling of the flow was performed based on the results obtained in the experiment. Cavitation could play an importa

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Hua, Ning, Xian’e Ren, Feng Yang, Yongchun Huang, Fengyan Wei, and Lihui Yang. "The Effect of Hydrodynamic Cavitation on the Structural and Functional Properties of Soy Protein Isolate–Lignan/Stilbene Polyphenol Conjugates." Foods 13, no. 22 (2024): 3609. http://dx.doi.org/10.3390/foods13223609.

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In this study, hydrodynamic cavitation technology was utilized to prepare conjugates of soy protein isolate (SPI) with polyphenols, including resveratrol (RA) and polydatin (PD) from the stilbene category, as well as arctiin (AC) and magnolol (MN) from the lignan category. To investigate the effects of hydrodynamic cavitation treatment on the interactions between SPI and these polyphenols, the polyphenol binding capacity with SPI was measured and the changes in the exposed sulfhydryl and free amino contents were analyzed. Various methods, including ultraviolet–visible spectroscopy, fluorescenc

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Nicholas, David, and Philip Vella. "Biosolids Conditioning with Hydrodynamic Cavitation." Proceedings of the Water Environment Federation 2009, no. 3 (2009): 845–55. http://dx.doi.org/10.2175/193864709793846682.

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Moholkar, V. S., P. Senthil Kumar, and A. B. Pandit. "Hydrodynamic cavitation for sonochemical effects." Ultrasonics Sonochemistry 6, no. 1-2 (1999): 53–65. http://dx.doi.org/10.1016/s1350-4177(98)00030-3.

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Suslick, Kenneth S., Millan M. Mdleleni, and Jeffrey T. Ries. "Chemistry Induced by Hydrodynamic Cavitation." Journal of the American Chemical Society 119, no. 39 (1997): 9303–4. http://dx.doi.org/10.1021/ja972171i.

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Dursun, Mehtap, Bülent Keskinler, Nihal Bektaş, and Ergün Yıldız. "Preliminary treatment of landfill leachate by hydrodynamic cavitation supported by Fenton process." MOJ Ecology & Environmental Sciences 9, no. 4 (2024): 178–84. http://dx.doi.org/10.15406/mojes.2024.09.00324.

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Hydrodynamic cavitation as an effective and environmentally friendly method of treating wastewater. Massive amounts of energy may be released into the surrounding liquid during hydrodynamic cavitation, resulting in mechanical , chemical and thermal impacts. Bacteria and organic materials in sewage can be broken down by these circumstances. Furthermore, a coupling effect may be created by combining hydrodynamic cavitation with other water treatment techniques. In this study it is aim to investigate and improve the hydrodynamic cavitation (HDC) process supported by Fenton process for the pretrea

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Sun, Yu, Huanghua Peng, Wei Liu, Jiamin Guo, and Ya Guo. "Comparison of the hydrodynamic performance of front and rear-stator pump-jet propulsors in an oblique wake under the cavitation condition." Physics of Fluids 34, no. 3 (2022): 033317. http://dx.doi.org/10.1063/5.0082769.

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Pump-jet propulsors, which exhibit high efficiency and low noise, are widely used in underwater vehicles. In a marine environment, a nonuniform wake and an oblique flow affect a propulsor's hydrodynamic force. Therefore, the hydrodynamic performance of front and rear-stator pump-jet propulsors under complex operational conditions was compared in this study. The unsteady hydrodynamic performance was predicted using a shear stress transport k– ω model. When the calculation converged, the Schnerr–Sauer cavitation model was used to simulate the cavitation performance. After an analysis of grid ind

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Stoeva, Donka, Apostol Simitchiev, and Hristo Hristov. "Cavitation treatment of water from a wastewater treatment plant." E3S Web of Conferences 207 (2020): 05002. http://dx.doi.org/10.1051/e3sconf/202020705002.

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Hydrodynamic cavitation damages the apparatus by intensive cavitational erosion of the elements in a hydro system. Being acquainted with the mechanisms of effect, hydrodynamic cavitation can be used to intensify technological processes in different industrial areas. The aim of the present work is to investigate the possibilities using hydrodynamic cavitation for wastewater treatment from an urban treatment plant. To intensify the purifying process series of trials, at different levels of intensity of the electrical field in the zone of cavitation, were performed. Additionally presented, the el

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Gogate, Parag R., and Aniruddha B. Pandit. "Engineering design methods for cavitation reactors II: Hydrodynamic cavitation." AIChE Journal 46, no. 8 (2000): 1641–49. http://dx.doi.org/10.1002/aic.690460815.

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Chatterjee, Dhiman, and Vijay H. Arakeri. "Towards the concept of hydrodynamic cavitation control." Journal of Fluid Mechanics 332 (February 1997): 377–94. http://dx.doi.org/10.1017/s0022112096004223.

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A careful study of the existing literature available in the field of cavitation reveals the potential of ultrasonics as a tool for controlling and, if possible, eliminating certain types of hydrodynamic cavitation through the manipulation of nuclei size present in a flow. A glass venturi is taken to be an ideal device to study the cavitation phenomenon at its throat and its potential control. A piezoelectric transducer, driven at the crystal resonant frequency, is used to generate an acoustic pressure field and is termed an ‘ultrasonic nuclei manipulator (UNM)'. Electrolysis bubbles serve as a

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