Mechanisms of Sand and Dust Erosion in Gas Turbine Engines.

Smeltzer, C.E.; Gulden, M. E.; McElmury, Scott S.; Compton, W. A.

doi:10.21236/ad0876584

Cited by 31 publications

(14 citation statements)

References 3 publications

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“…al. [9]. It was proposed that when the particles impact on the metal surface in the extreme conditions of a turbine, they stagnate momentarily and impart some kinetic and thermal energy to the metal.…”

Section: Past Studiesmentioning

confidence: 99%

Preliminary Experimental Investigation of Initial Onset of Sand Deposition in the Turbine Section of Gas Turbines

Boulanger

Patel

Hutchinson

et al. 2016

Volume 1: Aircraft Engine; Fans and Blowers; Marine

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Particle ingestion into modern gas turbine engines is known to reduce performance and may damage many primary gas path components through erosion or deposition mechanisms. Many studies have been conducted that evaluate the effects of particulate ingestion in primary and secondary gas path components. However, modern gas turbines have gas path temperatures that are above most previous studies. As a result, this study performed particle deposition experiments at the Virginia Tech Aerothermal Rig facility at engine representative temperatures. Arizona Test Dust of 20 to 40 μm was chosen to represent the particle ingested into rotorcraft turbine engines in desert and sandy environments. The experimental setup impinged air and sand particles on a flat Hastelloy X coupon. The gas and sand mixture impacted the coupon at varying angles measured between the gas flow direction and coupon face, hereby referred to as coupon angle. For this study, gas and sand particles maintained a constant flow velocity of about 70 m/s and a temperature of about 1100°C. The coupon angle was varied between 30° to 90° for all experiments. The experimental results indicate sand deposition increased linearly from about 975 °C to 1075 °C for all coupon angles. A multiple linear regression model is used to estimate the amount of deposition that will occur on the test coupon as a function of gas path temperature and coupon angle. The model is adequate in explaining about 67% of the deposition that occurs for the tests. The remaining percentage could be explained with other factors such as particle injection rates and exact surface temperature where the deposits occur.

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Section: Past Studiesmentioning

confidence: 99%

Preliminary Experimental Investigation of Initial Onset of Sand Deposition in the Turbine Section of Gas Turbines

Boulanger

Patel

Hutchinson

et al. 2016

Volume 1: Aircraft Engine; Fans and Blowers; Marine

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“…They involve basic assumptions as to the process governing material removal. Finnie (4) and Smeltzer et al (5) have conducted theoretical analyses of the erosion of ductile materials. In more recent investigations, further insight into the actual mechanism of erosion has been obtained by examining the target surface at high magnification using metallographic techniques and electron microscopy.…”

Section: Present State Of the Artmentioning

confidence: 99%

High Temperature Erosion Study of Metals Used in Turbomachinery

Tabakoff

Wakeman

1984

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

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Gas turbine engines operating in dusty environments are exposed to severe erosion, especially the compressor and the turbine components. Predicting erosion in rotating machinery is a very complex problem. In order to provide the basis for alloy selection in future turbines using pulverized coal, an investigation is undertaken to obtain a basic understanding of the mechanisms of erosion at high temperatures. For this purpose, a test facility has been designed to simulate the aerodynamic and thermodynamic conditions in the turbine. The effects of high temperature on the erosion rate for different alloys are experimentally determined and the results obtained are presented in this paper. The findings are very important in predicting erosion rate for future turbomachinery exposed to particulate flows.

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“…They involve basic assumptions as to the process governing material removal. Finnie [2] and Smeltzer et al [3] have conducted theoretical analyses of the erosion of ductile materials. In more recent investigations (1,4,51, further insight into the actual mechanism of erosion has been obtained by examining the target surface at high magnification using metallographic techniques and electron microscopy.…”

Section: Pmentioning

confidence: 99%

Basic Erosion Investigation in Small Turbomachinery.

Tabakoff¹,

Wakeman²

1981

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Mechanisms of Sand and Dust Erosion in Gas Turbine Engines.

Cited by 31 publications

References 3 publications

Preliminary Experimental Investigation of Initial Onset of Sand Deposition in the Turbine Section of Gas Turbines

Preliminary Experimental Investigation of Initial Onset of Sand Deposition in the Turbine Section of Gas Turbines

High Temperature Erosion Study of Metals Used in Turbomachinery

Basic Erosion Investigation in Small Turbomachinery.

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