Assessment of erosion wear in low specific speed Francis turbine due to particulate flow

Sharma, Shubham; Gandhi, Bhupendra K.

doi:10.1016/j.apt.2023.104065

Cited by 16 publications

(1 citation statement)

References 25 publications

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“…Solid particle erosion is one of the main factors affecting the reliability and availability of the whole set of hydraulic turbine design elements. The flow part of the hydraulic turbine is subjected to this type of wear, i.e., to a greater extent the runner, guide vanes, front sides of the head, and the bottom covers [7][8][9][10][11][12][13][14][15][16][17][18]. The development of waterjet wear depends on the concentration, density, geometric shape, and size of the solid particles, as well as on the mechanical properties of the material of the parts and the rotational speed of the rotor of the hydraulic machine [19,20].…”

Section: Introductionmentioning

confidence: 99%

Studies of the Solid Particle Erosion Resistance of 30 L Steel with Different Types of Surface Modification

Tkhabisimov,

Mednikov,

Zilova

2023

Metals

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Earlier studies have shown that 30 L steel, used for the manufacture of hydraulic machinery equipment elements, has greater resistance to cavitation wear than 20 GL steel. This paper presents the results of experimental studies of the solid particle erosion resistance of 30 L structural steel samples with different surface modifications based on nitriding and boriding processes. The characteristics of the modified near-surface layers were determined. The results of the solid particle erosion resistance tests carried out according to the ASTM G76-13 standard are presented. The research results demonstrated that boriding processes worsen the solid particle erosion resistance of 30 L steel at flow impact angles of 30° and 90°. All the considered variants of surface nitriding at an impact angle of 90° do not worsen the solid particle erosion resistance of 30 L steel samples, while at an impact angle of 30°, they increase the solid particle erosion resistance by at least 10–20%.

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