Investigations Into the Causes of Corrosion or Erosion of Propellers*

Parsons, Charles A.; Cook, Stanley S.

doi:10.1111/j.1559-3584.1919.tb00807.x

Cited by 17 publications

(7 citation statements)

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“…By doing so, the material is used as a recorder of the highest pressures in the cavitating field, since each material acts as a high pass filter and records as pits only the cavitating field pressure peaks at the material surface that exceed its yield stress and plastically deform permanently. Observation of pits for the purpose of evaluating the cavitation field intensity dates back to the early 1900s when Parsons and Cook [17] observed the depth and dimensions of the pitted areas, and researchers reported the pitting location relative to the cavitation cloud shape and statistics such as the number and the depth of pitting [18][19][20]. Knapp [19][20][21] introduced the idea that the pits could be used to understand the intensity of the cavitation field.…”

Section: Introductionmentioning

confidence: 99%

Scaling study of cavitation pitting from cavitating jets and ultrasonic horns

Jayaprakash¹,

Choi²,

Chahine³

et al. 2012

Wear

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International audienceCavitation erosion prediction and characterization of cavitation field strength are of interest to industries suffering from cavitation erosion detrimental effects. One means to evaluate cavitation fields and materials is to examine pitting rates during the incubation period, where the test sample undergoes localized permanent deformations shaped as individual pits. In this study, samples from three metallic materials, an Aluminum alloy (Al 7075), a Nickel Aluminum Bronze (NAB) and a Duplex Stainless Steel (SS A2205) were subjected to a vast range of cavitation intensities generated by cavitating jets at different driving pressures and by an ultrasonic horn. The resulting pitted sample surfaces were examined and characterized with a non-contact 3D optical scanner and the resulting damage computer-analyzed. A statistical analysis of the pit population and its characteristics was then carried out. It was found that the various cavitation field strengths can be correlated to the measured pit distributions and that two characteristic quantities: a characteristic number of pits per unit surface area and unit time, and a characteristic pit diameter or a characteristic pit depth can be attributed to a given "cavitation intensity level". This characterization concept can be used in the future to study the cavitation intensity of the full scale and to develop methods of full scale predictions based on model scale erosion data

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Section: Introductionmentioning

confidence: 99%

Scaling study of cavitation pitting from cavitating jets and ultrasonic horns

Jayaprakash¹,

Choi²,

Chahine³

et al. 2012

Wear

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show abstract

“…The cavitation principle has been studied for well over a century and the term cavitation was first used for describing voids in liquid flows [4]. Osbourne Reynolds [5] noticed the formation of a white cloud and the presence of a noise similar to that of boiling when he studied the flow of water in the throat of a converging-diverging glass tube in 1984.…”

Section: Introductionmentioning

confidence: 99%

“…Osbourne Reynolds [5] noticed the formation of a white cloud and the presence of a noise similar to that of boiling when he studied the flow of water in the throat of a converging-diverging glass tube in 1984. Parsons and Cook [4] were the first to conduct a proper investigation and claimed that cavitation can erode solid materials for certain flow situations. By the end of the twentieth century, research on the cavitation process in hydro-mechanical systems focused on a better understanding of this mechanism [6].…”

Section: Introductionmentioning

confidence: 99%

“…A theory was proposed to show the impact of water hammer effects on pumps and turbines. Water vapor bubbles were said to be eroding the turbine blades due to a water hammer effect that consists of high-pressure waves in a flow when it encounters an abrupt obstruction because of flow hindrance or other solid material [4]. Rayleigh amended Cook's theory and calculated the compressibility of vapor bubbles during the collapse of the cavity.…”

Section: Introductionmentioning

confidence: 99%

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A Review on the Erosion Mechanism in Cavitating Jets and Their Industrial Applications

et al. 2021

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Cavitating jets have been widely studied for over a century, but despite the extensive literature on this subject, the implementation of cavitating jets in many industries is still very limited due to technical challenges. The main purpose of the present paper is to provide recommendations on using the cavitating jets based on a comprehensive literature review on the erosion mechanism in these jets. Self-resonating jets are extensively discussed in the present paper due to their importance in amplifying the erosion effect of cavitating jets. The influence of different jet nozzle geometric parameters and the operating conditions of the cavitating jet flow on the erosion mechanism is also discussed. Finally, well drilling in addition to multiple other industrial applications of cavitating jets are examined.

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“…[3,[14][15][16]). Cavitation pitting studies dates back to the early 1900's when Parsons and Cook [17] observed the depth and dimensions of the pitted areas on marine propellers. Since then, many researchers have tried to correlate the location of pitting with cavitation bubble clouds along with statistics of pit number and pit diameters and depths [2,[18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Relationship between material pitting and cavitation field impulsive pressures

Choi¹,

Chahine²

2016

Wear

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Material pitting from cavitation has been used on and off as an indicator of the vague concept of 'cavitation intensity'. Periodically, some researchers suggest the use of pitting tests as a means to provide quantitative measurements of the amplitude of the impulsive pressures in the cavitation field, especially when combined with Tabor's formula or with finite element computations with idealized synthetic loads. This paper examines the viability of such a suggested method using fully coupled bubble dynamics and material response, and strongly concludes that the method provides at best a qualitative assessment of the cavitation erosion potential. Peak pressures deduced from pit geometry are significantly lower than the ones actually applied. In addition the correspondence is highly dependent on the way the load is applied and different loading scenarios with the same amplitude of the cavitation impulsive pressure result in different pit aspect ratios.

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Investigations Into the Causes of Corrosion or Erosion of Propellers*

Cited by 17 publications

References 0 publications

Scaling study of cavitation pitting from cavitating jets and ultrasonic horns

Scaling study of cavitation pitting from cavitating jets and ultrasonic horns

A Review on the Erosion Mechanism in Cavitating Jets and Their Industrial Applications

Relationship between material pitting and cavitation field impulsive pressures

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