The influence of water air content on cavitation erosion in distilled water

Auret, J. G.; Damm, Oliver; Wright, Gary J.; Robinson, F. P. A.

doi:10.1016/0301-679x(93)90083-d

Cited by 15 publications

(3 citation statements)

References 4 publications

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“…The relative magnitude of the opposing effects of cavity collapse and the cushioning effect dictate particle breakage using cavitation. Previous studies on cavitation erosion have also shown this cushioning effect. − Yamaguchi et al studied the effect of ultrasound frequency on the size reduction of liposomes . They found that low-frequency ultrasound can reduce the size of liposomes faster than that with high-frequency ultrasound.…”

Section: Introductionmentioning

confidence: 96%

Particle Breakage Using Wet Mill, Ultrasonic, and Hydrodynamic Cavitation

Tiwari,

Walker,

Ranade

2023

Crystal Growth & Design

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In-line fluidic devices and mills are often used for controlling crystal size distribution during crystallization. In this work, we investigated the breakage of organic crystals in three particle breakage devices. Paracetamol was selected as a model API (active pharmaceutical ingredient). In order to focus the investigation on particle breakage, we have used paracetamol suspended in its saturated solution and eliminated possible changes in particle size because of crystallization or dissolution. Particle breakage in a wet mill (WM), which is one of the commonly used particle breakage devices, is compared with the two cavitation-based devices: one based on ultrasonic or acoustic cavitation (AC) and the other based on hydrodynamic cavitation (HC). The particle size distributions (PSD) were measured by using laser diffraction. Kapur function analysis was used to study the effect of various conditions, such as rotational speed, intensity, or pressure drop, on the specific breakage rates and breakage mechanisms. The vortexbased HC device used in this work generated more fine particles than any other technique at a similar power consumption.

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Section: Introductionmentioning

confidence: 96%

Particle Breakage Using Wet Mill, Ultrasonic, and Hydrodynamic Cavitation

Tiwari,

Walker,

Ranade

2023

Crystal Growth & Design

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“…For water, it has been shown many times that additionally added air to the flow reduces the erosion e.g. [11][12][13][14][15]. This fact leads even to concepts with air injection to avoid cavitation erosion in water-turbines [16].…”

Section: Introductionmentioning

confidence: 99%

Influence of Air Dissolved in Hydraulic Oil on Cavitation Erosion

Osterland

Müller

Weber

2021

TJFP

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This article gives experimentally evidence that cavitation erosion in hydraulic components like valves and pumps is caused by vapour cavitation not gas or pseudo cavitation. In fact, the free air content which is released by vapour and gas cavitation reduces the erosion significantly. In order to clearly separate the different cavitation types, a test rig with a specially designed reservoir with integrated degassing capability is presented. As flow geometry a valve model with realistic dimensions and under realistic operating conditions was used, which ensures very high transferability of the results to the reality of hydraulic components in practical applications and typical operating conditions. A total of 4 five-hour long tests are performed and analysed. The quantification of the cavitation erosion is determined by the mass loss of the copper samples. The experimental results show a 4.4–5.1 times higher mass loss in tests with air-free oil compared to tests with air-saturated or oversaturated hydraulic oil. The experimental fact that air-free hydraulic oil causes significantly more cavitation erosion than normal (saturated) hydraulic oil, and its implications are discussed. The conclusion can be drawn, that further developments of hydraulic components and systems towards the use of air-free oil or increasing power densities will be disproportionately challenged by cavitation erosion.

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“…Currently, aeration has been incorporated as a mandatory requirement in design specifications for high-velocity discharge structures and, as a result, has been widely adopted for cavitation erosion protection. However, there been a lack of a clear understanding of the mechanism of aeration for cavitation erosion protection, and there are inconsistent explanations for why aeration can prevent cavitation erosion (Ivany and Hammitt 1965;Hammitt 1980;Auret et al 1993;Xu et al 2010;Brennen 2014). The lack of experimental research into the mechanism of aeration for cavitation erosion protection is the main reason for this gap.…”

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confidence: 99%

Mesoscale Analysis of Aeration for Cavitation Erosion Protection

2020

Mesoscale Analysis of Hydraulics

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The influence of water air content on cavitation erosion in distilled water

Cited by 15 publications

References 4 publications

Particle Breakage Using Wet Mill, Ultrasonic, and Hydrodynamic Cavitation

Particle Breakage Using Wet Mill, Ultrasonic, and Hydrodynamic Cavitation

Influence of Air Dissolved in Hydraulic Oil on Cavitation Erosion

Mesoscale Analysis of Aeration for Cavitation Erosion Protection

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