Evaluation of Liner Cavitation Potential through Piston Slap and BEM Acoustics Coupled Analysis

Wang, Xiaoyu; Wang, Haofeng; Zhao, Jingchao; Zhou, Shiqi; Zhang, Luo; Han, Qinkai

doi:10.3390/math10060853

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…Heavy-duty diesel engines are the main power source for commercial vehicles, construction machinery, agricultural machinery, ships, power generation equipment and defense equipment [18,28]. In recent years, with the increasing average effective pressure and power of diesel engines, the structure of diesel engines tends to be more compact, which has increased the cavitation risk of cylinder liners to a large extent [5,23,33].…”

Section: Introductionmentioning

confidence: 99%

Modelling and evaluating piston slap-induced cavitation of cylinder liners in heavy-duty diesel engines.

Liu,

Sun,

Zhu

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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Cavitation erosion of cylinder liner seriously affects the operational reliability and service life of heavy-duty diesel engines. The accuracy of the modeling-based cavitation risk evaluation is limited by the unclear correspondence between cylinder liner vibration and coolant cavitation. This report is intended to investigate the correspondence between cylinder liner vibration and coolant pressure by combining vibration cavitation test, pressure gradient calculation, and visualization observation. The cavitation risk of the cylinder liner under piston slap is also quantitatively analyzed based on the nonlinear structural dynamics model. The results show that the occurrence of cavitation will cause a nonlinear relationship between the cylinder liner acceleration and the coolant pressure. The difference in cavitation risk for each cylinder is related to the structural modal characteristics of the crankcase. In addition, the effect of piston-liner clearance and piston pin offset on the cavitation risk is investigated based on the dynamics model.

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Section: Introductionmentioning

confidence: 99%

Modelling and evaluating piston slap-induced cavitation of cylinder liners in heavy-duty diesel engines.

Liu,

Sun,

Zhu

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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Vibration-induced cavitation in cylinder liners caused by piston slaps

Liu,

Li,

Sun

et al. 2024

International Journal of Mechanical Sciences

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Cylinder Liner Velocity Calculation under Dynamic Condition in the Pursuit of Liner Cavitation Investigation of an Internal Combustion Engine

Chowdhury

2023

SAE Int. J. Engines

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<div>An analytical method for nonlinear three-dimensional (3D) multi-body flexible dynamic time-domain analysis for a single-cylinder internal combustion (IC) engine consisting of piston, connecting rod, crank pin, and liner is developed. This piston is modeled as a 3D piston that collides with the liner as in a real engine. The goal is to investigate the piston slap force and subsequent liner vibration. Liner vibrational velocity is directly responsible for pressure fluctuations in the coolant region resulting in bubble formation and subsequent collapse. If the bubble collapse is closer to the liner surface, cavitation erosion in the liner might occur. The mechanism of liner cavitation is briefly explained, which would take a full computational fluid dynamics (CFD) model to develop, which is out of scope for the present work. However, as a first step, the present method focused on a comprehensive and accurate estimation of the highest inward and outward liner velocities, which are directly related to the bubble formation and collapse, respectively. Sensitivity of liner velocity to different engine-operating conditions (warm and hot, with highest skirt temperatures of 178 and 130°C), piston pin bore offsets (thrust side, anti-thrust side directions in the amounts of 0.6 mm, and the nominal no offset case), and liner thicknesses are determined. Piston thermal growth is considered as part of the analysis resulting in interference condition between piston skirt and liner under the hot operating condition and low minimum clearance under the warm condition. Correlation of liner velocity contour plots with real engine liner cavitation erosion is presented. Analytical model showed a maximum liner inward velocity of 55 mm/s with no piston pin offset under nominal engine-operating configuration. A correlation has been found between location of this highest liner velocity and location of the actual cavitation erosion in the field.</div>

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Evaluation of Liner Cavitation Potential through Piston Slap and BEM Acoustics Coupled Analysis

Cited by 3 publications

References 24 publications

Modelling and evaluating piston slap-induced cavitation of cylinder liners in heavy-duty diesel engines.

Modelling and evaluating piston slap-induced cavitation of cylinder liners in heavy-duty diesel engines.

Vibration-induced cavitation in cylinder liners caused by piston slaps

Cylinder Liner Velocity Calculation under Dynamic Condition in the Pursuit of Liner Cavitation Investigation of an Internal Combustion Engine

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