IKBFU's Vestnik

2018 Issue №2

The Flow of Gas with Dispersed Particles in a Cylindrical Channel at a Subsonic Speed

Abstract

In this article, we present a method and an algorithm for calculating the dynamic characteristics of gas flow in a cylindrical channel at a subsonic speed, in the presence of dispersed particles in the gas. The problem of identifying the dynamic characteristics of dispersed particle- containing inert gas feed into ladles and the converter is used to improve the accuracy of inert gas dosing. The relevant boundary value problem has no analytical solution. We consider the dynamics of a steady flow of a perfect gas containing dispersed particle in a vertical channel. Numerical methods are used to obtain a solution to the boundary value problem in the Mathcad environment. We present the results of a study of changes in gas parameters along the channel at different gas flow rates. The graphs show dimensional variables. We consider the distributed density of the dispersed phase, the temperatures of the carrier and dispersed phases, the Mach number M, the Reynolds number Re, the Nusselt number Nu, and the Stokes number Stk.

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Risk Analysis at Industrial Enterprises Exposed to Post-Earthquake Fires

Abstract

In this article, I analyse risks borne by businesses that have experienced seismic impacts aggravated by secondary fires. I suggest taking into account this circumstance as part of a mechanism to ensure the post-earthquake fire safety of industrial facilities. It is also important to consider aspiration flows as an influencing factor. The risk analysis employs an algorithm for ensuring complex system safety, which proves to be universal. The mechanism in question should be employed in both preparing architectural plans of buildings and structures and conducting rescue operations in emergencies. Based on this analysis, I draw a sample of categorized industrial facilities located in smaller cities and rural areas.

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