Research on the Effect of Non-smooth Convex Hull Structure of High-Speed EMU on Air Resistance and Friction Noise

Zhu, Haihua; Wang, Yu-hao; Huang, Haiming; Wang, Jianchang; Xu, Qiying

doi:10.1007/978-981-16-7381-8_131

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…For example, studies have uncovered that shark skin can decrease the surface resistance along the flow direction because grooves exist on the skin to essentially regulate the flow boundary layer [22]. The body surface structure of many creatures is special, presenting different types of non-smooth surfaces, which provide new ideas for the study of anti-wear, drag-reduction, and other technologies [23][24][25]. The mollusk shell is a typical natural biomineralization material with excellent wear resistance [26].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Bionic Circular Groove Non-Smooth Structure on the Anti-Wear Performance of the Two-Vane Pump

Yan

et al. 2022

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The characteristics of the material transported by the two-vane pump can cause the impeller to wear out, leading to a deterioration in hydraulic efficiency. Appropriately, the research goal of this paper is to consolidate the anti-wear performance of the two-vane pump conveying a solid-liquid two-phase flow. Based on the bionic principle and the anti-wear structure of blood clams, the circular non-smooth structure adapted from blood clams is arranged in the wear-prone area. Through numerical simulation, we compare the main indexes of the pump: the head, the pressure distribution, the vortex pressures, and the average wear rate, to reveal the wear resistance mechanism of circular non-smooth structures. The results illustrate that the use of a circular non-smooth structure does not modify the external characteristics of the pump; the pressure distribution inside the impeller is similarly consistent, and the vortex pressures are all approximately the same. The average wear rate is higher when the diameter of the circular non-smooth structure is either 0.25 mm or 0.30 mm, and the simulation results are poor. At a diameter of 0.20 mm, the average wear rate of circular non-smooth blades is at its lowest point. The circular non-smooth surface structure causes impurities to be “caught” by the vortex zone and not freely struck against the wall, resulting in the particles migrating away from the blade.

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Section: Introductionmentioning

confidence: 99%

Effect of the Bionic Circular Groove Non-Smooth Structure on the Anti-Wear Performance of the Two-Vane Pump

Yan

et al. 2022

Lubricants

View full text Add to dashboard Cite

show abstract

Research on the Effect of Non-smooth Convex Hull Structure of High-Speed EMU on Air Resistance and Friction Noise

Cited by 1 publication

References 3 publications

Effect of the Bionic Circular Groove Non-Smooth Structure on the Anti-Wear Performance of the Two-Vane Pump

Effect of the Bionic Circular Groove Non-Smooth Structure on the Anti-Wear Performance of the Two-Vane Pump

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