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2篇 您的检索式：作者名="Jerzy Krawczyk"

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		题名	作者	年代	出处	被引量
	1	A preliminary study on selected methods of modeling the effect of shearer operation on methane propagation and ventilation at longwalls显示文摘Underground coal mining frequently uses longwalls.The occurrence of a potentially explosive mixture of methane and air is one of the most serious hazards.A large number of papers have applied numerical modeling of methane propagation in research aimed at this problem.To date,none of the CFD simulations has considered the movement of the shearer in the analyses.This paper proposes an adaptation of a method used for the description of the movement of trains in tunnels to a specific geometry of a longwall district.The flow of the air-methane mixture was calculated using the finite volume method,in particular the k-w SST and SAS turbulence models.Due to the movement of the shearer,moving and deforming meshes were used for simulation of unsteady flows.Examples of solutions for two hypothetical cases are presented.Finally,the drawbacks and advantages of presented methods are discussed.Further development with the application of either local mesh variability or overset meshes is outlined.	Jerzy Krawczyk	2020	International Journal of Mining Science and Technology2020，30，5：	2
	2	The influence of hypereutectoid cementite morphology upon fracture toughness of chromium-nickel-molibdenium cast steel of ledeburite class 显示文摘	Janusz Krawczyk Edyta Rozniata Jerzy Pacyna	2005	Journal of Materials Processing Technology2005，16，2163：	1

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