Determination of the causes of low service life of the air fan impeller made of high-strength steel

Tuz, Lechosław

doi:10.1016/j.engfailanal.2021.105502

Cited by 7 publications

(6 citation statements)

References 13 publications

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“…Sustainability 2022, 14, x FOR PEER REVIEW 14 of 20 treated steel with fine grains for wire mesh in the future study since such steel has better performance in carrying static and dynamic loads [70,71]. This type of steel may be welded to reinforcing bars using welding heat input [72], so that the delamination of ferrocement that occurred in this study may be prevented.…”

Section: Load and Displacement Relationshipmentioning

confidence: 97%

“…Therefore, the deformation capacity of strengthened beam-column joint was increased by 60%, which was almost similar to that was designed with current building code. To improve the load carrying capacity as well as the deformation capacity, it is recommended to use high strength heattreated steel with fine grains for wire mesh in the future study since such steel has better performance in carrying static and dynamic loads [70,71]. This type of steel may be welded to reinforcing bars using welding heat input [72], so that the delamination of ferrocement that occurred in this study may be prevented.…”

Section: Load and Displacement Relationshipmentioning

confidence: 99%

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Deformation Capacity of RC Beam-Column Joints Strengthened with Ferrocement

et al. 2022

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Beam-column joints constructed in the pre-seismic building code do not provide transverse reinforcement and good reinforcement detailing within the region. These cause the occurrence of brittle shear failure, which is one of the factors affecting the number of reinforced concrete (RC) moment resistance building structures collapsing during an earthquake. Therefore, in this study a brittle beam-column joint with a non-seismic building code was designed and strengthened by a ferrocement. Four layers of wire mesh with a diameter of 1 mm and a mesh size of 25.4 mm were installed on both sides of the beam-column joint and cement mortar was cast on it. As a comparison, a ductile beam-column joint was also designed following the current building code, which considers seismic effects. The test results by applying reversed cyclic loading at the beam tip showed that strengthening using ferrocement prevents crack propagation, increasing the deformation capacity, ductility, stiffness, and energy dissipation of beam column joint which are higher than those of the beam-column joint which is designed following the current building code. However, the strengthening does not improve the load carrying capacity significantly.

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Section: Load and Displacement Relationshipmentioning

confidence: 97%

Section: Load and Displacement Relationshipmentioning

confidence: 99%

Deformation Capacity of RC Beam-Column Joints Strengthened with Ferrocement

et al. 2022

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“…The analysis conducted in [23] of the severe failure of the fan impeller rotor made of S690Q unalloyed heat-treated high strength steel showed the influence of the welding technological regimes on the high-strength steels joining that caused imbalance and overall structural instability under high centrifugal force.…”

Section: Impeller Design Background and Research Tasksmentioning

confidence: 99%

Materials Selection and Design Options Analysis for a Centrifugal Fan Impeller in a Horizontal Conveyor Dryer

et al. 2021

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Comparative strength analysis of two popular options of the radial centrifugal fan impeller design used in horizontal conveyor dryer for fine-grained raw materials is presented. Three types of materials for impeller manufacturing—ASTM A36 steel, Hardox 450 steel and aluminium alloy 6061-T6 are considered. The finite element method (FEM) has been used to investigate stresses and deformations of the impeller within the operational speed range. Analysis shows that the better design is the impeller made of Hardox 450 steel with a central disk. Although the maximum stress is slightly higher in the blades slot for central disk fitting for this design option, it has greatly reduced stresses in contact edges with two other disks (by 22–38%) and blades bending deformation (by 51%). For this design, the maximum operational rotation speed is 1135 min−1 according to the yield strength with a 15% safety factor, while for basic design, it is 1225 min−1. The rational choice of material depends on maximum value of the yield stress to density ratio as well as taking into account the operating conditions and required fan performance. Recommendations for manufacturing the centrifugal fan impeller related to chosen material are given.

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“…When introducing hydrogen into gas, particularly around fittings, new automated welding techniques with high power density, such as electron beam or laser welding, are being utilized more regularly [35,36]. The welding area and the heat-affected zone could potentially be the weakest area due to crystallization conditions or as a result of thermal conductivity during welding [37].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Changes in Natural Gas Supplies to Poland on the Amount of Hydrogen Produced in the SMR Reactor

Biały,

Żywczak,

Szurlej

2024

Energies

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Thanks to investments in diversifying the supply of natural gas, Poland did not encounter any gas supply issues in 2022 when gas imports from Russia were ceased due to the Russian Federation’s armed intervention in Ukraine. Over the past few years, the supply of gas from routes other than the eastern route has substantially grown, particularly the supplies of liquefied natural gas (LNG) via the LNG terminal in Świnoujście. The growing proportion of LNG in Poland’s gas supply leads to a rise in ethane levels in natural gas, as verified by the review of data taken at a specific location within the gas system over the years 2015, 2020, and 2022. Using measurements of natural gas composition, the effectiveness of the steam hydrocarbon reforming process was simulated in the Gibbs reactor via Aspen HYSYS. The simulations confirmed that as the concentration of ethane in the natural gas increased, the amount of hydrogen produced, and the heat required for reactions in the reformer also increased. This article aims to analyze the influence of the changes in natural gas quality in the Polish transmission network caused by changes in supply structures on the mass and heat balance of the theoretical steam reforming reactor. Nowadays, the chemical composition of natural gas may be significantly different from that assumed years ago at the plant’s design stage. The consequence of such a situation may be difficulties in operating, especially when controlling the quantity of incoming natural gas to the reactor based on volumetric flow without considering changes in chemical composition.

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Determination of the causes of low service life of the air fan impeller made of high-strength steel

Cited by 7 publications

References 13 publications

Deformation Capacity of RC Beam-Column Joints Strengthened with Ferrocement

Deformation Capacity of RC Beam-Column Joints Strengthened with Ferrocement

Materials Selection and Design Options Analysis for a Centrifugal Fan Impeller in a Horizontal Conveyor Dryer

The Influence of the Changes in Natural Gas Supplies to Poland on the Amount of Hydrogen Produced in the SMR Reactor

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