Simulation of Blade Erosion of Variable-pitch Axial Flow Fan

doi:10.16182/j.issn1004731x.joss.201805018

Abstract

Abstract: Affected by the performance of dust precipitators, significant differences of blade erosion regimes and erosion rates in induced draft fans are exhibited due to various particle diameters and concentrations. A 3D numerical simulation on a single-stage axial fan is carried out using Fluent to investigate the blade erosion regimes. The important features including particle trajectories under different particle diameters, erosion pattern and particle mass concentration distribution on the pressure and suction surfaces are examined, and the effect of particle mass concentration on erosion rate is analyzed. The results show that the erosion regimes are mainly affected by particle diameter. Differing from a centrifugal fan, most collisions of particles are occurred on the pressure surface, and as particle diameter increases, collision points gradually center on blade leading edge, resulting in severely inhomogeneous erosion. In addition, blade erosion rate is primarily dominated by particle mass concentration, while erosion pattern is negligibly influenced, the erosion rate deteriorates linearly with increasing particle mass concentration.

Key words: axial flow fan, particle diameter, particle concentration, erosion regime, erosion rate

CLC Number:

TH4
O355

Li Chunxi, Zhang Dan, Ye Xuemin. Simulation of Blade Erosion of Variable-pitch Axial Flow Fan[J]. Journal of System Simulation, 2018, 30(5): 1762-1771.

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