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Development of a grinding device for producing coal powder-raw materials of coal-water fuel

Kurytnik Igor P., Khassenov Ayanbergen K., Nussupbekov Ulan B., Karabekova Dana Z., Nussupbekov Bekbolat R., Bolatbekova Madina

Archive of Mechanical Engineering

2022

LXIX, nr 2

259--268

This article proposes a method for grinding coal based on the use of the energy of a pulsed shock wave resulting from a spark electric discharge in a liquid. The main purpose of the scientific work is the development of an electric pulse device for producing coal powder, the main component of coal-water fuel. The diameter of the initial coal fraction averaged 3 mm, and the size of the resulting product was 250 μm. To achieve this goal, the dependence of the length of a metal rod electrode (positive electrode) on the length and diameter of its insulation is investigated. Various variants of the shape of the base (bottom) of the device acting as a negative electrode are considered, and an effective variant based on the results of coal grinding is proposed. An experimental electric pulse installation is described, the degree of coal grinding is determined depending on the geometric parameters. The optimal characteristics of the obtained coal powder have been established.

Difference melt model

Kazhikenova Saule Sh., Shaltakov Sagyndyk N., Nussupbekov Bekbolat R.

Archives of Control Sciences

2021

Vol. 31, No. 3

607--627

The basic objective of the research is to construct a difference model of the melt motion. The existence of a solution to the problem is proven in the paper. It is also proven the convergence of the difference problem solution to the original problem solution of the melt motion. The Rothe method is implemented to study the Navier-Stokes equations, which provides the study of the boundary value problems correctness for a viscous incompressible flow both numerically and analytically.