Laser surface texturing of Wankel engine apex seals

Morris, Nicholas J.; Hart, George A.; Wong, Yong Jie; Simpson, Matthew; Howell-Smith, S.J.

doi:10.1088/2051-672x/ababf5

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…The ability to account for transient loads has enabled the calculation of dynamic coefficients [130]. For sealing applications, analytical modelling has been used to design apex seals used in Wankel engines [159]. A numerical model showed significant improvements in the static and dynamic performance of a foil air journal bearings for textures consisting of either dimples or grooves when compared with a conventional plain foil [165].…”

Section: Surface Texturingmentioning

confidence: 99%

STMP at 10: shaping surface metrology, measurement and phenomena for a decade

Wood

Costa

2022

Surf. Topogr.: Metrol. Prop.

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Surface Topography: Metrology and Properties (STMP) is reaching its 10th Birthday soon and this paper looks at the inception of the journal and the goals set in the mid 2010s and will look back at what it has published in the most highly cited areas and detail future initiatives to serve the readership. STMP publishes the latest physics, chemistry, life science, materials science and engineering research on applied, functional surfaces. It has published ground-breaking work on surface design, measurement, instrumentation, manufacturing, functionality and modelling as well as cross-disciplinary work on surface and interface engineering across an array of different applications. It is the home of papers from the biannual international conference on Metrology and Properties of Surfaces series. The journal was awarded it’s first impact factor in 2017 and has a current value of 2.038 (2020) and is now working to improve on this. A new initiative for 2021 is to offer a collection of papers from emerging leaders within the scope of the journal.

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Section: Surface Texturingmentioning

confidence: 99%

STMP at 10: shaping surface metrology, measurement and phenomena for a decade

Wood

Costa

2022

Surf. Topogr.: Metrol. Prop.

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“…Laser-based surface texturing is an alternate and economical approach to achieve corrosion resistance on cold rolled materials. 31,32 Laser irradiation of materials induces chemical modifications on the surface to enhance corrosion resistance. 33,34 Laser-based texturing has gained attraction for surface modification due to exceptional control on the target sites and the ease of operation.…”

Section: Introductionmentioning

confidence: 99%

Enhanced corrosion resistance of CoCrMo by laser-based surface modification

Vidyasagar,

Kalyanasundaram

2024

Surface Engineering

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Biomedical grade cobalt–chromium–molybdenum (CoCrMo) alloys are extensively used for load-bearing biomedical applications such as hip and knee implants due to their exceptional biocompatible and biomechanical properties. However, the strain-induced martensite ε-phase development during contact loading results in thin oxide layers that are prone to fracture leading to corrosion. The formation of thin oxide layers is undesirable for long-term deployment. We employed laser-texturing to enhance the corrosion resistance of the material in simulated body fluid by the formation of hcp ε-phase martensite and via the formation of oxide layers. However, partial formation of hcp ε-phase martensite was observed. By means of central composite design-based response surface methodology, three laser parameters such as average laser power, texture density and the number of passes were optimised for maximal open circuit potential, an indicator for minimal corrosion. The textured surfaces were found to assist in the cellular proliferation of fibroblasts and inhibit bacterial growth.

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“…Similarly, in a textured circumferential gas seal, Kligerman et al [26] found significant improvement in the hydrodynamic effect, which prevents rubbing and wear between the shaft and seal ring. Laser surface texturing in the Wankel rotary can reduce friction power loss by about 30% [27]. In piston ring/cylinder liner contact, optimally designed textures enhanced the lubrication condition both near the top dead center by increasing minimum clearance and at mid-stroke by decreasing the minimum clearance [28].…”

Section: Introductionmentioning

confidence: 99%

Optimal design of surface texture in meso scale air journal bearing

Hingawe¹,

Bhore²

2021

Surf. Topogr.: Metrol. Prop.

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Meso scale air journal bearing has widespread application in miniaturized systems and there is a strong need to improve its tribological performance. Although surface texturing can improve its performance, very few studies have addressed this issue. Therefore, this paper investigates the influence of texture geometrical parameters on the tribological performance of meso scale air journal bearing. A numerical study is carried out in a thin-film model of the COMSOL 5.2 package. The effect of texture geometrical parameters viz. position, depth, orientation, and slender ratio on tribological characteristics such as load-carrying capacity and friction coefficient is first analyzed by response surface methodology based Box-Behnken design. Further, a multi-objective optimization study is carried out using grey relational analysis. For the optimum design, textured air bearing has obtained ACCEPTED FOR PUBLICATION

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Laser surface texturing of Wankel engine apex seals

Cited by 9 publications

References 20 publications

STMP at 10: shaping surface metrology, measurement and phenomena for a decade

STMP at 10: shaping surface metrology, measurement and phenomena for a decade

Enhanced corrosion resistance of CoCrMo by laser-based surface modification

Optimal design of surface texture in meso scale air journal bearing

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