Porównanie metod cięcia termicznego stali

Krawczyk, R.; Słania, Jacek; Cieśla, Damian

doi:10.26628/ps.v87i7.408

Cited by 3 publications

(3 citation statements)

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“…A k-omega SST turbulence model was applied for simulation, due to the specific type of airflow in the mine. This model was verified for similar airflow modeling in mining excavations and provided accurate results [18,19]. The velocity inlet was set to 3 m/s and the pressure outlet was applied to prevent reverse flow into the computational domain.…”

Section: Numerical Simulation Results Comparisonmentioning

confidence: 96%

Comparison of Hexcore and Poly-Hexcore computational meshes in the aspect of air flow modeling based on the actual geometry of mining excavations

Wróblewski,

Macek,

Bansiewicz

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Discrete models are used in industry for many applications. In one of the most frequently used Finite Element Method (FEM) for Computational Fluid Dynamics (CFD) calculations, discrete models may be two-dimensional or three-dimensional. 2D models are used as a simplification to achieve satisfied results in the shortest computational time. 3D models, on the other hand, are used for more complex calculations. These models constitute a representation of real-world objects that have been appropriately simplified to make the calculations accurate and correct. The calculation time of a 3D model is significantly longer compared to a 2D model. For this reason, to reduce the calculation time, different types of simplifications and various types of discrete model meshes are used. In this paper, the authors made a comparison of two computational meshing technologies: Hexcore and Poly-Hexcore in the aspect of airflow modeling in mining excavations using CFD. The geometry considered in this case came from real-world excavations captured by laser scanning in the Gertruda Slant, Zloty Stok. Point cloud data was processed through feature extraction, which was subsequently utilized to create structured models of mining excavations. The results of the simulations show that taking into account such a diverse and complicated geometry and its significant lengths, reaching tens of kilometers, better results are obtained with the use of Poly-Hexcore mesh. This type of mesh allows simulations to be performed with similar accuracy in a shorter computation time. Utilizing a more modern type of mesh makes work more dynamic, which is of particular importance when conducting numerical simulations of air distribution in large and complex computational domains.

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Section: Numerical Simulation Results Comparisonmentioning

confidence: 96%

Comparison of Hexcore and Poly-Hexcore computational meshes in the aspect of air flow modeling based on the actual geometry of mining excavations

Wróblewski,

Macek,

Bansiewicz

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The authors of the paper [7] have noted that while cutting a 18 mm plate made of S355J2 steel, there is a slight bulge on the cut surface. This is probably caused by the weakening of the laser beam, which, in turn, is somewhat distracted at the lower cutting edge, causing a groove.…”

Section: Studying the Effect Of Finishing Work On The Geometric Accurmentioning

confidence: 99%

Studying the Effect of Finishing Work on the Geometric Accuracy of the Laser Cut Elements

Skoczylas

2018

Adv. Sci. Technol. Res. J.

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The article presents the results of geometric accuracy studies of the C45 steel elements after laser cutting, and then subjected to finishing work. Burnishing and a combined machining and burnishing were applied as finishing works. Geometric accuracy studies of the elements after laser cutting and after finishing work were conducted in accordance with the PN-EN ISO 9013: 2017-04 standard. It has been noted that the finishing machining enables the improvement of geometric accuracy of the surface after laser cutting. Machining of elements after laser cutting allows for a reduction of the inclination index of the surface up to 42% with respect to the index value after laser cutting. Finishing milling makes it possible to reduce the surface inclination index more than twice. By performing burnishing of elements after laser cutting and finishing milling, no significant improvement of the element accuracy is obtained.

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“…The process technology is very important; the process parameters should be adjusted so that the most favourable shape of the surface could be maintained without compromising the proper direction of flame movement and a relatively high cutting rate [1,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Surface Quality after Oxygen Cutting

Krawczyk¹,

Słania²

2022

eBIS

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Porównanie metod cięcia termicznego stali

Abstract: Porównanie metod cięcia termicznego stali Comparison of thermic cutting steel methods Dr inż. Ryszard Krawczyk; dr hab. inż. Jacek Słania, prof. PCZ; inż. Damian Cieśla-Politechnika Częstochowska.

Cited by 3 publications

References 0 publications

Comparison of Hexcore and Poly-Hexcore computational meshes in the aspect of air flow modeling based on the actual geometry of mining excavations

Comparison of Hexcore and Poly-Hexcore computational meshes in the aspect of air flow modeling based on the actual geometry of mining excavations

Studying the Effect of Finishing Work on the Geometric Accuracy of the Laser Cut Elements

Analysis of Surface Quality after Oxygen Cutting

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