scholarly journals Influence of the shape of quartz sand particles factor on single particle erosion damage

2019 ◽  
Vol 1384 ◽  
pp. 012032
Author(s):  
M I Nasyrova ◽  
P A Kulakov
Keyword(s):  
Single Particle ◽  
Quartz Sand ◽  
Particle Erosion ◽  
Erosion Damage ◽  
Sand Particles

Improved CFD modeling and validation of erosion damage due to fine sand particles

Wear ◽  
2015 ◽  
Vol 338-339 ◽  
pp. 339-350 ◽  
Author(s):  
Amir Mansouri ◽  
Hadi Arabnejad ◽  
Soroor Karimi ◽  
Siamack A. Shirazi ◽  
Brenton S. McLaury
Keyword(s):  
Fine Sand ◽  
Cfd Modeling ◽  
Erosion Damage ◽  
Sand Particles

Fabrication of recyclable superhydrophobic materials with self-cleaning and mechanically durable properties on various substrates by quartz sand and polyvinylchloride

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 79238-79244 ◽  
Author(s):  
Mengnan Qu ◽  
Shanshan Liu ◽  
Jinmei He ◽  
Juan Feng ◽  
Yali Yao ◽  
...  
Keyword(s):  
Quartz Sand ◽  
Sand Particles ◽  
Self Cleaning

The recyclable superhydrophobic materials are successfully prepared by employing surface-functionalized quartz sand particles embedded into polyvinylchloride.

scholarly journals Particles fluidized bed receiver/reactor tests with quartz sand particles using a 100-kWth beam-down solar concentrating system at Miyazaki

2017 ◽  
Author(s):  
Tatsuya Kodama ◽  
Nobuyuki Gokon ◽  
Hyun Seok Cho ◽  
Koji Matsubara ◽  
Hiroshi Kaneko ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Quartz Sand ◽  
Sand Particles

scholarly journals The Analysis of Erosive Wear Resistance of WC-Co Carbides Obtained by Spark Plasma Sintering Method

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7326
Author(s):  
Joanna Wachowicz ◽  
Tomasz Dembiczak ◽  
Grzegorz Stradomski ◽  
Zbigniew Bałaga ◽  
Joanna Jasińska ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Quartz Sand ◽  
Metal Cutting ◽  
Oriented Strand Board ◽  
Cutting Tools ◽  
Erosive Wear ◽  
Plasma Sintering ◽  
Erosion Models ◽  
Spark Plasma ◽  
Sand Particles

WC-Co (tungsten carbide-cobalt) composites are widely used in industry, wear-resistant parts, and cutting tools. As successful tool materials, WC-Co carbides are widely applied in metal cutting, wear applications, chipless forming, stoneworking, wood, and plastic working. These materials are exposed to severe solid particle erosion by sand particles, such as in the wood industry. During the production of furniture with HDF (High Density Fibreboard), MDF (Medium Density Fibreboard), or OSB (Oriented Strand Board), there are observed problems with tool erosion. Contamination, mainly of the HDF by sand, is quite often, which is why all tools used for the machining of such materials are exposed to erosion by sand particles. Although many studies have been performed on the erosion of various metals, and erosion models exist to predict their erosion behavior, the issue is still relevant. The aim of the study was to determine the effect of grain size (submicron, ultrafine) and the manufacturing technology (SPS—Spark Plasma Sintering, conventional) used on the erosive properties of WC-Co sintered carbides. Sinters produced by the SPS method with different sizes of WC grains and commercial samples were used for the tests. Ten two-hour cycles were carried out under medium conditions of quartz sand and quartz sand with 10% SiC added. Used samples were characterised using scanning electron microscopy (SEM) and roughness was determined. Furthermore, erosion studies allowed individuating a wear mechanism as well as the possibility to foresee cutting performance in prospective application.

Evaluation of Solid Particle Erosion Damage on E-Glass/Epoxy Composites Using Acoustic Emission Activity

2005 ◽  
Author(s):  
N. H. Yang ◽  
H. Nayeb-Hashemi
Keyword(s):  
Acoustic Emission ◽  
Solid Particle ◽  
Residual Strength ◽  
Epoxy Composites ◽  
Distribution Model ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Damage Mechanisms ◽  
Erosion Damage ◽  
Impact Angles

The effect of solid particle erosion on the strength properties of E-glass/epoxy composite was investigated. Solid particle erosion with SiC particles 400 μm to 500 μm in diameter was simulated on 12 ply [45°/−45°/0°/45°/−45°/0°]s E-glass/epoxy composites with constant particle velocity of 42.5 m/s at impact angles of 90°, 60°, and 30° for 30, 60, 90 and 120 seconds. Damaged and undamaged specimens were subjected to tensile tests while monitoring their acoustic emission (AE) activity. An erosion damage parameter was defined as a function of the particle impact angle and erosion duration to determine the residual tensile strength of the composite. Scanning electron microscope (SEM) images of the erosion damaged specimens revealed the same damage mechanism occurred at different impact angles. The distribution of AE events by event duration, ring down counts and energy distribution were used to characterize the different damage mechanisms that occurred during tensile loading of damaged and undamaged specimens. The results showed AE activity could be used to distinguish between different damage mechanisms within the composite, such as fiber/matrix debonding, delamination and fiber fracture. The Weibull probability distribution model and the AE stress delay parameter model were developed to relate the AE activity to the erosion damage and residual strength. The results showed both the Weibull probability model and the stress delay model could be used to predict residual strength of the composites.

Experimental and Numerical Investigation of Small Particle Erosion in Gas Dominated Multiphase Flow

2021 ◽  
Author(s):  
G. Haider ◽  
M. Othayq ◽  
S. A. Shirazi
Keyword(s):  
Multiphase Flow ◽  
Small Particle ◽  
Hot Spots ◽  
Flow Behavior ◽  
Petroleum Engineering ◽  
Small Particles ◽  
Particle Erosion ◽  
Sand Particles ◽  
Pass Through ◽  
Paint Removal

Abstract Sand production is a significant challenge in petroleum engineering, and specifically in multiphase gas condensate wells where small amount of liquid is present with the gas. Sand particles entrained in multiphase flow can severely affect the integrity of fluid transportation structures such as pipelines, elbows, and reducers. Traditionally, sand management techniques such as sand screens and gravel packs are used to control sand. However, small particles can pass through these controls. Furthermore, small particles can block a part of the sand screen, causing high velocities in other sections which can cause erosion of the sand screen openings allowing larger particles to pass through which in turn cause more erosion. Furthermore, these small particles are highly susceptible to turbulent regions of flow and can cause severe erosion in these regions. Hence, it is critically important to understand the erosion caused by small particles. This study investigates the effect of small particles on erosion. Small particle erosion is more severe in gas dominated multiphase flows such as annular and mist flows than liquid dominated bubbly and slug flows. A 90-degree standard elbow is used in the experimental and numerical analyses because of its high erosion vulnerability and its importance in pipeline applications. This is because the flow changes direction in this geometry which has complex implications on erosion. This study follows the below mentioned research method: 1) Flow Visualization Study: To understand the flow behavior in bend. 2) Paint-Removal Study: To visualize the progress of paint-removal pattern and to identify the erosion hot spots caused by sand particles. 3) Multiphase Erosion Experiments: To determine the wall thickness loss on identified hot spots using fix-mounted temperature compensated ultrasonic measurement technique. 4) Computational Fluid Dynamics (CFD) Study: To compare erosion patterns with CFD simulations of multiphase flow. Furthermore, the effects of particle size on erosion ratio and its distribution in pipe bends are discussed. The CFD results of larger particles agree better with experimental data than for smaller particles using existing erosion models.

Solid Particle Erosion Characteristics of 2.25Cr–1Mo Steel Aged at 750 °C

2020 ◽  
Vol 20 (7) ◽  
pp. 4513-4516
Author(s):  
Kwang-Hu Jung ◽  
Seong-Jong Kim
Keyword(s):  
Stainless Steel ◽  
Flow Velocity ◽  
Aging Time ◽  
Solid Particle ◽  
Vickers Hardness ◽  
Surface Hardness ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Erosion Damage ◽  
Damage Type

This study evaluated the solid particle erosion characteristics of 2.25Cr–1Mo steel with aging time. Aging was performed at 750 °C until 100 h. Specimens aged at each time were characterized by microstructure analysis and Micro-Vickers hardness. An erosion experiment was conducted using 100~200 μm of stainless steel shot at a flow velocity of 20 m/s for 4 h. A consequently, a microstructure degradation phenomenon in which Cr-rich carbide was coarsened occurred, and the surface hardness decreased by 45%. With a decrease in the hardness, the solid particle erosion damage increased and the erosion damage type changed.

Study of Erosion Characteristics of Solid Particles in the First Reheat Stage Blades of a Supercritical Steam Turbine

2014 ◽  
Author(s):  
Liu-xi Cai ◽  
Shun-sen Wang ◽  
Juan Di ◽  
Jing-ru Mao ◽  
Zhen-ping Feng ◽  
...  
Keyword(s):  
Weight Loss ◽  
Particle Size ◽  
Steam Turbine ◽  
Size Distribution ◽  
Particle Erosion ◽  
Suction Surface ◽  
Erosion Damage ◽  
Rotating Blades ◽  
Pressure Surface ◽  
Axial Clearance

Reducing solid particle erosion (SPE) of blades is one of the most urgent problems for supercritical steam turbine power generation technology. Based on the erosion rate models and the particle rebound models of blade materials obtained through the accelerated erosion test under high temperature, erosion characteristics of the first reheat stage blades in a supercritical steam turbine was simulated and analyzed by three-dimension numerical simulation method in this paper. The influence of operating conditions, particle size distribution in the inlet of nozzle and axial clearance between vanes and rotating blades on the erosion distribution of cascade were explored quantitatively. Results show that: the erosion damage of the first-reheat stage stator is mainly caused by suction surface impingement from oxide particles. In designed loading condition, small and median size of particles mainly eroded the trailing edge (TE) of nozzle pressure surface, while large particles mainly impinge the leading edge (LE) of rotating blades and the TE of vane suction surface, and erosion increase along the blade height. When the turbine is running under part-load condition, particle impingement angle on stator pressure surface is basically unchanged, while impingement velocity slightly reduced. However, the amount of particles that impinge the stator TE suction side after their first-time impingement on rotor LE increase rapidly, leading to the more severe erosion damage of stator suction surface. The particle size distribution in the inlet of nozzle has a significant effect on the erosion simulation of first reheat stage blades, and the size distribution sampled in one unit may not be used to other units. When axial clearance changes, the erosion weight loss of vane pressure surface near TE is basically held constant, while the erosion weight loss in vane suction surface near TE decreases with the increase of axial clearance. For the supercritical 600MW unit simulated in this article, the anti-SPE performance and the unit efficiency can be balanced well when the axial clearance increases to 13mm. The results in this paper will provide a technology basis for reducing oxide particle erosion in the first reheat stage blades of supercritical steam turbine.

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