Cavitation Bubble Measurement in Tribological Contacts Using Digital Holographic Microscopy

Tang, Tian; Morris, Nicholas J.; Coupland, John N.; Arévalo, Laura

doi:10.1007/s11249-015-0488-3

Cited by 14 publications

(8 citation statements)

References 29 publications

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“…Arcoumanis et al [49,50] have also documented the cavitation pattern variation in reciprocating piston ring-liner assemblies while simultaneously measuring the lubricant film thickness, either by employing capacitance [49] or laser induced fluorescence [50]. Most recently, Tang et al [51] employed a digital holographic microscope to perform measurements of the cavitation bubbles generated in a sliding linear contact replicating the ring-liner pair. They observed closed cavitation streamers when a plane glass was driven by a bi-directional translation stage against a cylindrical lens.…”

Section: Cavitationmentioning

confidence: 99%

Looking into a laser textured piston ring-liner contact

Vlădescu

Ciniero

Tufail

et al. 2017

Tribology International

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Section: Cavitationmentioning

confidence: 99%

Looking into a laser textured piston ring-liner contact

Vlădescu

Ciniero

Tufail

et al. 2017

Tribology International

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“…Most recently, [16] reported the measurement of the oil film thickness for different lubricant using LIF and showed that the formulation and chemistry of the lubricant play a major role in the oil film thickness curves and that the cavitation structure is affected by speed and load. Another useful technique to visualise and measure cavitation bubble formation and its thickness is the digital holography method, which was described by [17] and used for the first time in an optical sliding bearing system. They showed that it is possible to produce high-resolution images to measure the bubble thickness and position.…”

Section: Introductionmentioning

confidence: 99%

Effect of Viscosity and Speed on Oil Cavitation Development in a Single Piston-Ring Lubricant Assembly

et al. 2019

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A high-speed camera has been used to produce unique time-resolved images of high quality to describe the dynamics of the lubricant flow and cavitation characteristics in a sliding optical liner over a fixed single piston-ring lubricant assembly for three lubricants with different viscosities to establish their impact on cavitation formation and development. The images were obtained at two cranking speeds (or liner sliding velocity) of 300 rpm (0–0.36 m/s) and 600 rpm (0–0.72 m/s), at a lubricant temperature of 70 °C and a supply lubricant rate of 0.05 L/min. A special MATLAB programme has been developed to analyse the cavitation characteristics quantitatively. The dynamic process of cavities initiation was demonstrated by time-resolved images from fern cavity formation to fissure cavities and then their development to the sheet and strings cavities at a liner sliding velocity of around 0.17 m/s. The results for both up- and down-stroke motions showed that the cavities reach their fully developed state downstream of the contact point when the liner velocity reaches its highest velocity and that they start to collapse around TDC and BDC when the liner comes to rest. Within the measured range, viscosity had a great influence on length of cavities so that a decrease in viscosity (from Lubricant A to C) caused a reduction in length of cavities of up to 35% for Lubricant C. On the other hand, an increase in speed, from 300 rpm to 600 rpm, have increased the number of string cavities and also increased the length of cavities due to thicker oil film thickness with the higher speed. Overall, the agreement between the processed data by MATLAB and visualisation measurements were good, but further thresholds refinement is required to improve the accuracy.

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“…The viscosity of the oil, sliding speed, and film shape are the same with the values in the experiments, while the film thickness measured by the optical interferometry is used as h min . 6 1 1 6 1 1…”

Section: Simple Numerical Analysis For Initial Stage Of Cavity Growthmentioning

confidence: 99%

“…The phenomena related to cavitation include cavitation erosion, starvation, and breakdown of lubrication film in bearings, which are negative effects, but also reducing the friction coefficient and improving seal performance in seals and bearings, which are positive effects. Recently, the cavitation phenomena in the machine elements, such as journal bearing [2,3], seal [4], piston ring-cylinder liner [5,6], microtextured surface [7,8], have been studied by experimental observation and numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts

2018

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This article describes experimental and theoretical studies on the cavitation phenomena in the grease lubrication film under pure sliding elastohydrodynamic contact. In situ observation tests using the optical interferometry technique were conducted, and the growth of cavitation was captured using a high-speed camera. The results showed that the cavity grew in two stages, which was similar to the behavior in the base oil, and that the cavity growth rate in the initial stage was higher than that in the second stage. In the initial stage, the cavity growth time in the grease was longer than that in the base oil, and the cavity length after the growth depended on the base oil viscosity. It was also found in the test using diurea grease that small cavities were formed by the lumps of thickener. The cavity growth in the initial stage was discussed by numerical simulation of pressure distribution based on a simple rheological model.

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Cavitation Bubble Measurement in Tribological Contacts Using Digital Holographic Microscopy

Cited by 14 publications

References 29 publications

Looking into a laser textured piston ring-liner contact

Looking into a laser textured piston ring-liner contact

Effect of Viscosity and Speed on Oil Cavitation Development in a Single Piston-Ring Lubricant Assembly

Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts

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