Key roles of micro-particles in water on occurrence of cavitation-erosion of hydro-machinery

Wang, Jiadao; Chen, Haosheng; Qin, Li; Li, Yongjian; Chen, Darong

doi:10.1007/s11434-008-0089-8

Cited by 20 publications

(7 citation statements)

References 8 publications

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“…As a phenomenon occurs frequently in hydrodynamic machinery, cavitation always induces erosion of solid surface with the help of micro-particles in the process of cavity collapse [1] . As a phenomenon occurs frequently in hydrodynamic machinery, cavitation always induces erosion of solid surface with the help of micro-particles in the process of cavity collapse [1] .…”

mentioning

confidence: 99%

Validation of full cavitation model in cryogenic fluids

et al. 2009

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mentioning

confidence: 99%

Validation of full cavitation model in cryogenic fluids

et al. 2009

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“…As presented in Figure 4, the rotating disk device consists of a disk with pins or holes at various radii (Steller and Gireń, 2015), and cavitation bubbles are generated and collapsed by the movement of the pins or holes in the disk through the ambient stationary liquid. Using the rotary disk cavitation system which can consider the centrifugal force in rotary hydraulic machines (i.e., pump and turbine), Wang et al, (2008) investigated the microparticles and their size on cavitation erosion process. In this study, the dimensions of the sample were 40 × 30 × 6 mm, and material of the sample was the Q235 steel without heat treatment.…”

Section: Rotating Discmentioning

confidence: 99%

“…A physical model is also proposed and indicates that the existence of solid particles will increase the number of heterogeneous nucleation and reduce the number of bubbleparticle combinations, leading to the cavitation erosion process together. Using a rotary disk cavitation system and numerical simulations as well, Wang et al, (2008) investigated the effects of microparticles on cavitation erosion, and the particles were made of CeO 2 with diameters, such as 0.1, 0.5, 1.2, 1.8, 2.6, and 4 μm. This work revealed that existence of particles with proper size that play important roles in the generation of cavitation erosion, and the micro shockwave is critical to cavitation erosion.…”

Section: Sediment Sizementioning

confidence: 99%

A review on synergy of cavitation and sediment erosion in hydraulic machinery

Wang

Tan²,

Chen³

et al. 2022

Front. Energy Res.

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The synergy of cavitation and sediment erosion is the most severe destruction in hydraulic machinery in sediment-laden rivers, and currently the physics and mechanism are still lack of understanding. The synergy effects of cavitation and sediment erosion not only reduce the efficiency and life of hydraulic machinery but also cause costs in operation and maintenance. With the rapid development of renewable clean energy and the transformation of water resources, an increasing number of new hydropower stations and water diversion projects are currently planned or under construction, where most of them are in sediment-laden rivers. In the present paper, the research work, including theory, experiment, and simulation, in this field carried out by various investigators are presented and discussed. Physical mechanisms involved in the synergy of cavitation and sediment erosion which is responsible for material damage as investigated by researchers have also been discussed, and would help to identify gaps for future studies.

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“…The cavitation of microparticles with different sizes and shapes on the surface of 45# steel through a rotating disc cavitation experiment device was studied, and they found that with the increase of particle size under different shapes of microparticles, the distribution law of cavitation pit diameter was different, and analyzed that the fusion ability of microparticles with different shapes and cavitation bubble was different (Yan et al , 2015). The research on the influence of different particle sizes of CeO 2 on cavitation erosion showed that the critical particle size of microparticles cavitation erosion was 1 μm, and the smaller particle size caused relatively slight cavitation damage to the material surface (Wang et al , 2008). The microparticles in water affected the cavitation noise in the ultrasonic vibration system, SiO 2 microparticles less than 100 μm reduced the cavitation noise, which was attributed to the microparticles stabilizing the constrained oscillation of the cavitation bubbles (Ge et al , 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of micro-particles on cavitation erosion behavior of 2Cr3WMoV steel

Zhao,

Ding,

et al. 2024

ACMM

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Purpose This paper aims to study the influence of microparticles on the surface cavitation behavior of 2Cr3WMoV steel; microparticle suspensions of different concentration, particle size, material and shape were prepared based on ultrasonic vibration cavitation experimental device. Design/methodology/approach 2Cr3WMoV steel was taken as the research object for ultrasonic cavitation experiment. The morphology, quantity and distribution of cavitation pits were observed and analyzed by metallographic microscope and scanning electron microscope. Findings The study findings showed that the surface cavitation process produced pinhole cavitation pits on the surface of 2Cr3WMoV steel. High temperature in the process led to oxidation and carbon precipitation on the material surface, resulting in the “rainbow ring” cavitation morphology. Both the concentration and size of microparticles affected the number of pits on the material surface. When the concentration of microparticles was 1 g/L, the number of pits reached the maximum, and when the size of microparticles was 20 µm, the number of pits reached the minimum. The microparticles of Fe3O4, Al2O3, SiC and SiO2 all increased the number of pits on the surface of 2Cr3WMoV steel. In addition, the distribution of pits of spherical microparticles was more concentrated than that of irregularly shaped microparticles in turbidity. Originality/value Most of the current studies have not systematically focused on the effect of each factor of microparticles on the cavitation behavior when they act separately, and the results of the studies are more scattered and varied. At the same time, it has not been found to carry out the study of microparticle cavitation with 2Cr3WMoV steel as the research material, and there is a lack of relevant cavitation morphology and experimental data.

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Key roles of micro-particles in water on occurrence of cavitation-erosion of hydro-machinery

Cited by 20 publications

References 8 publications

Validation of full cavitation model in cryogenic fluids

Validation of full cavitation model in cryogenic fluids

A review on synergy of cavitation and sediment erosion in hydraulic machinery

Effect of micro-particles on cavitation erosion behavior of 2Cr3WMoV steel

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