Computational fluid dynamic study on the tribological performance of dimple-textured surface fabricated using the turning process

Rahman, Haniff Abdul; Ghani, Jaharah A.; Mahmood, Wan Mohd Faizal Wan; Rasani, Mohammad Rasidi Mohammad

doi:10.1108/ilt-05-2018-0211

Cited by 8 publications

(16 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although rather large, the dimple geometry from Figure 1 with an area ratio of 9.9% and aspect ratio (dimple depth over width) of 0.16 is still approaching the range which can produce a positive effect under hydrodynamic lubrication. 8,38 Moreover, the dimple size was also within those derived by earlier researchers to significantly affect the tribological performance. 28,29,36…”

Section: Methodssupporting

confidence: 75%

“…CFD simulation on the dimple textured surface found that the dimple was able to generate the much-needed positive hydrodynamic pressure and load-carrying capacity, with the potential of separating the sliding surfaces compared to the smooth untextured surface. 38 This is supported by experimental results, in which the dimple textured surface produced by DAT generates up to 56% lower friction compared to the smooth surface when sliding on a reciprocating tribometer. 39 However, multiple dimple models should be used in the simulation instead of a single dimple model, due to more accurate representation of hydrodynamic performance considering the arrays of dimple itself.…”

Section: Introductionmentioning

confidence: 60%

“…In addition, as a result of larger converging wedge, dimple orientation perpendicular to the sliding direction was found to provide better performance compared to the parallel orientation. 38…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrodynamic performance study of a dimple textured surface at various area ratios and sliding speeds using CFD

Rahman

Ghani

Mahmood

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

A three dimensional computational fluid dynamic (CFD) analysis was conducted to understand the hydrodynamic performance of a dimple texture produced using recently invented low-cost dynamic-assisted tooling (DAT) in the machining process. Five different area ratios, αr of 0%, 1.63%, 3.26%, 6.53%, and 9.80%, and three different sliding speeds represented by Reynolds number, Re of 10, 45, and 80 were analyzed. From the study, there existed an optimum area ratio of 3.26%, which generated up to 290% higher load-carrying capacity compared to a fully textured surface. These findings revealed the benefits of dimple texture produced using DAT, as well as proposing the optimum area ratio needed to be considered in order to optimize the dimple performance for actual application on piston engine surfaces in the near future.

show abstract

Section: Methodssupporting

confidence: 75%

Section: Introductionmentioning

confidence: 60%

See 1 more Smart Citation

Hydrodynamic performance study of a dimple textured surface at various area ratios and sliding speeds using CFD

Rahman

Ghani

Mahmood

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

“…The area ratio is used to control the pit radius. Referring to previous research (Abdul Rahman et al , 2019; Sadeghi et al , 2019), the pit radius is most appropriate to be controlled within 0.2–0.5 mm. The depth of the pit is controlled by the ratio of depth to diameter.…”

Section: Energy Consumption Calculation Model Of Textured Piston Pairmentioning

confidence: 95%

Analysis of lubrication and sealing performance on textured piston pair with multi-factor coupling

Quan

Guo

Liu

et al. 2021

ILT

View full text Add to dashboard Cite

Purpose This paper aims to study the lubrication and sealing performance on the textured piston pair under the cross action of the shape and structure parameters. This paper further carries out the optimization design of low energy consumption hydraulic impact piston pair. Design/methodology/approach Based on the characteristics of the ring gap seal piston pair, the flow field analysis model of the whole film gap is established for its periodic treatment. The friction power loss of the piston pair is defined as the evaluation index of the lubrication performance and the leakage power loss as the evaluation index of the sealing performance. The orthogonal test design and CFD software were used to analyze the lubrication and sealing performance of the textured piston pair. Findings The cross action of shape and structure factors has a great influence of the lubrication and sealing performance on the textured piston pair. Clearance and shape parameters have great influence on it, while seal length and depth diameter ratio have little influence. The sealing performance of conical textured piston pair is good, while the lubrication performance of square textured piston pair is good. The primary and secondary order of influence of shape and structure on energy consumption on piston pair is B (seal clearance) > C (texture shape) > D (area ratio) > A (seal length) > E (depth diameter ratio). Originality/value Breaking the defect of local optimization design on traditional piston pair structure, then find the matching relationship of structural parameters on textured piston pair. Further improve the lubrication and sealing performance of the piston pair, and provide reference for the global optimization design of the low energy consumption hydraulic impact piston pair.

show abstract

“…The measurements for dimple structure geometry in this research were length, width, depth, area ratio and aspect ratio. Calculation for area ratio ( a r ) was based on equation (1) (Abdul Rahman et al , 2019): …”

Section: Methodsmentioning

confidence: 99%

Characteristics of dimple structure on aluminium silicon alloy fabricated using turning machine

Nasir

Ghani

Kasim

et al. 2021

ILT

Self Cite

View full text Add to dashboard Cite

Purpose This research aims to present the characteristics of dimple structure which was fabricated using a turning machine, where the characteristics include sizes, shapes, area ratio and aspect ratio. This research aims at filling the gap in the machining parameters of previous research in producing dimple by using turning process with the aid of dynamic assisted tooling for turning (DATT). In producing dimple, a carbide insert grade H1 was used on a hypereutectic aluminium silicon alloy (A390) material. Dimple has many advantages such as for reducing friction coefficient, load-carrying capacity and trap wear debris for sliding mechanical components. Design/methodology/approach There are seven machining parameters (cutting speed, feed rate, depth of cut, frequency, amplitude, rake angle, relief angle and nose radius) which have an influence on dimple produced. Taguchi method (orthogonal arrays L8) was used to conduct the experiment systematically and efficiently for these seven parameters. A carbide insert grade H1 was used as a cutting tool on a turning machine with the aid of DATT. The dimple structure was fabricated on a cylindrical rod hypereutectic aluminium silicon alloy (A390). A profilometer 3D Alicona infinite focus and an optical microscope equipped with Vis software were used to analyse the fabricated dimple structure. Findings Various shapes and sizes of ellipse dimples were produced in this research, including short and long drops with lengths in the range of 517.03–3,927.61 µm, widths of 565.15–1,039.19 µm, depths of 14.46–124.87 µm, area ratios of 5.05–25.65% and aspect ratios of 0.007%–0.111%. There were four experiments within the optimal area ratio range of 10%–20%, i.e. the second, third, seventh and eighth experiments. The width of these dimples was 895.95, 961.39, 787.27 and 829.22 µm, length was 826.26, 3163.13, 885.98 and 1026.65 µm, depth was 83.67, 84.19, 87.05 and 110.70 µm and area ratio was 15.12%, 13.14%, 14.79% and 12.70%. The surface roughness of textured surface was below 1 µm. In this research, the results obtained were similar with that of previous researchers on dimple structure related to tribology performance. Originality/value There exists machining parameters, namely, cutting speed and frequency, that were not used by previous research in producing dimple. These machining parameters (cutting speed and frequency) were used in this research to produce dimple via turning process with the aid of DATT using carbide insert grade H1. The turning process is an environmentally friendly process which is suitable for mass production for fabricating dimple structure as compared to most of the current methods which are widely used in fabricating dimple structure.

show abstract

Computational fluid dynamic study on the tribological performance of dimple-textured surface fabricated using the turning process

Cited by 8 publications

References 34 publications

Hydrodynamic performance study of a dimple textured surface at various area ratios and sliding speeds using CFD

Hydrodynamic performance study of a dimple textured surface at various area ratios and sliding speeds using CFD

Analysis of lubrication and sealing performance on textured piston pair with multi-factor coupling

Characteristics of dimple structure on aluminium silicon alloy fabricated using turning machine

Contact Info

Product

Resources

About