Physical and Theoretical Models of Heat Pollution Applied to Cramped Conditions Welding Taking into Account the Different Types of Heat

Abstract

Abstract. The standard k-epsilon turbulence model, adapted for welding workshops, equipped with fixed workstations with sources of pollution took into account only the convective component of heat transfer, which is quite reasonable for large-volume rooms (with low density distribution of sources of pollution) especially the results of model calculations taking into account only the convective component correlated well with experimental data. For the purposes of this study, when we are dealing with a small confined space where necessary to take account of the body heated to a high temperature (for welding), located next to each other as additional sources of heat, it can no longer be neglected radiative heat exchange. In the task -to experimentally investigate the various types of heat transfer in a limited closed space for welding and behavior of a mathematical model, describing the contribution of the various components of the heat exchange, including radiation, influencing the formation of fields of concentration, temperature, air movement and thermal stress in the test environment.Conducted field experiments to model cubic body, allowing you to configure and debug the model of heat and mass transfer processes with the help of the developed approaches, comparing the measurement results of air flow velocity and temperature with the calculated data showed qualitative and quantitative agreement between process parameters, that is an indicator of the adequacy of heat and mass transfer model.

Problems of Designing Dust Cleaning Equipment in the Industry

“…рис. 1) и выявить закономерности процес-са пылеулавливания на основе аэродинамиче-ской структуры газового потока [6][7][8].…”

“…To conduct modeling and experimentally investigate the efficiency of the dust collector with an inverted cone and adjustable design parameters on a semi-industrial experimental installation (see Fig. 1) and to reveal regularities of dust collection process on the basis of aerodynamic structure of gas flow [6][7][8].…”

The role of hazardous factors of chemical and physical nature in welders’ occupational risks management

“…Golovotyuka, R.M. Stern [1]. It has been established that the nature of the development and the complication of the course of occupational diseases depends on the chemical composition, concentration and duration of exposure to the welding aerosol.…”