Effect of Particle Size Distribution on Particle Dynamics and Blade Erosion in Axial Flow Turbines

This work presents the results of an investigation conducted to study the effect of coal ash particle size distribution on the particle dynamics, and the resulting blade erosion in axial flow gas turbines. The particle dynamics and their blade impacts are determined from a three-dimensional trajectory analysis within the turbine blade passages. The particle rebound conditions and the blade material erosion characteristics are simulated using empirical equations, derived from experimental measurements. For the typical ash particle size distribution considered in this investigation, the results demonstrate that the size distribution has a significant influence on the blade erosion intensity and pattern.

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Effect of Particle Size Distribution on Particle Dynamics and Blade Erosion in Axial Flow Turbines

Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations ◽

10.1115/90-gt-114 ◽

1990 ◽

Cited By ~ 2

Author(s):

W. Tabakoff ◽

A. Hamed ◽

M. Metwally

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Gas Turbines ◽

Three Dimensional ◽

Axial Flow ◽

Coal Ash ◽

Particle Dynamics ◽

Material Erosion ◽

Particles Size Distribution

This work presents the results of an investigation conducted to study the effect of coal ash particles size distribution on the particle dynamics, and the resulting blade erosion in axial flow gas turbines. The particle dynamics and their blade impacts are determined from a three dimensional trajectory analysis within the turbine blade passages. The particle rebound conditions and the blade material erosion characteristics are simulated using empirical equations, derived from experimental measurements. For the typical ash particle size distribution considered in this investigation, the results demonstrate that the size distribution has a significant influence on the blade erosion intensity and pattern.

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Influence of Secondary Flow on Turbine Erosion

Journal of Turbomachinery ◽

10.1115/1.3262270 ◽

1989 ◽

Vol 111 (3) ◽

pp. 310-314 ◽

Cited By ~ 5

Author(s):

A. Hamed

Keyword(s):

Secondary Flow ◽

Gas Turbines ◽

Trajectory Analysis ◽

Three Dimensional ◽

Axial Flow ◽

Coal Ash ◽

Particle Dynamics ◽

Experimental Measurements ◽

Material Erosion ◽

Erosion Intensity

This work presents the results of an investigation conducted to study the effect of secondary flow on blade erosion by coal ash particles in axial flow gas turbines. The particle dynamics and their blade impacts are determined from a three-dimensional trajectory analysis within the turbine blade passages. The blade material erosion behavior and the particle rebound characteristics are simulated using empirical equations derived from experimental measurements. The results demonstrate that the secondary flow has a significant influence on the blade erosion intensity and pattern for the typical ash particle size distribution considered in this investigation.

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Modelling the Effect of Particle Size Distribution in Multiphase Flows with Computational Fluid Dynamics and Physical Erosion Experiments

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.891-892.1615 ◽

2014 ◽

Vol 891-892 ◽

pp. 1615-1620 ◽

Cited By ~ 2

Author(s):

Chong Yau Wong ◽

Joan Boulanger ◽

Gregory Short

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Multiphase Flows ◽

Single Phase ◽

Phase Flow ◽

Single Phase Flow ◽

Material Erosion ◽

Physical Erosion ◽

Effect Of Particle Size

It is known that particle size has an influence in determining the erosion rate, and hence equipment life, on a target material in single phase flows (i.e. flow of solid particles in liquid only or gas only flows). In reality single phase flow is rarely the case for field applications in the oil and gas industry. Field cases are typically multiphase in nature, with volumetric combinations of gas, liquid and sand. Erosion predictions of multiphase flows extrapolated from single phase flow results may be overly conservative. Current understanding of particle size distribution on material erosion in multiphase flows is limited. This work examines the effect of particle size distribution on material erosion of a cylindrical aluminium rod positioned in a 2" vertical pipe under slug and distributed bubble regimes using various water and air volume ratios. This is achieved through physical erosion experiments and computational fluid dynamics (CFD) simulations tailored to account for particle dynamics in multiphase flows.

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Effect of Particle Size Distribution on the Properties of Sand Mold by Three Dimensional Printing

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.190-191.467 ◽

2012 ◽

Vol 190-191 ◽

pp. 467-470

Author(s):

Huo Ping Zhao ◽

Chun Sheng Ye ◽

Zi Tian Fan

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Three Dimensional ◽

Sand Mold ◽

Silica Sand ◽

Three Dimensional Printing ◽

Comprehensive Properties ◽

Effect Of Particle Size ◽

Dimensional Printing

In this study, three dimensional structures are fabricated by a self-developed three dimensional printing machine with eight different particle size distribution scrubbed silica sand. In order to evaluate particle size distribution effect on the properties of sand mold, the physical and mechanism properties of printed specimens, including weight, gas evolution, air permeability, tensile strength and compressive strength, were measured. The mechanism of effect was analyzed and studied. The results show that the printed specimens from the 80-140 mesh sand powder have the best comprehensive properties. Both wider and narrower particle size distribution adversely affects the properties of printed specimens.

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