Effects of sediment diameter and concentration on cavitation characteristics and mechanism

Effects of sediment diameter and concentration on cavitation characteristics and mechanism

The synergistic erosion caused by cavitation and abrasion is a common and severe problem for hydraulic machinery. In order to explore the mechanism of particles size and concentration effect on cavitation, taking the rotating disk as the research object. The solid-liquid-gas three-phase flow was cal...

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Veröffentlicht in:Tribology international 2022-07, Vol.171, p.107543, Article 107543
Hauptverfasser: SUN, Jie, GE, Xinfeng, CHU, Dongdong, ZHANG, Lei, MENG, Han, ZHENG, Yuan
Format: Artikel
Sprache:eng
Schlagworte:
Abrasion
Bubbles
Cavitation
Cavitation erosion
Damage
Hydraulic machinery
Interphase forces
K-epsilon turbulence model
Multiphase flow
Rotating disks
Solid-liquid-gas three-phase flow
Synergistic erosion
Turbulence models
Vortex characteristics
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Zusammenfassung:The synergistic erosion caused by cavitation and abrasion is a common and severe problem for hydraulic machinery. In order to explore the mechanism of particles size and concentration effect on cavitation, taking the rotating disk as the research object. The solid-liquid-gas three-phase flow was calculated based on the non-homogeneous multiphase flow model, modified RNG k−εturbulence model, and ZGB model. The increase of particles size firstly inhibited the bubbles (0.02 mm ≤ d ≤ 0.1 mm) and then promoted the bubbles (0.1 mm
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2022.107543