ANALYSIS OF THE SUCTION SYSTEM EFFICIENCY FOR REDUCING THE LEVEL OF AIR POLLUTION IN WORKING AREAS

Abstract

Problem statement. The task of efficiency assessment for suction system located near the highway and allows reducing chemical air pollution level in work areas is considered. This system changes the air flow aerodynamics and creates a dynamic barrier in the path of polluted air moving into the working areas. At the stage of designing systems for protecting air from pollution in working areas, it is necessary to have calculation methods that allow determining its efficiency for specific operating conditions. The purpose of the article. Development of mathematical models and software for conducting a computational experiment to determine the efficiency of using the suction system located near the highway. Methodology. An aerodynamic model of potential movement and the equation of impurities convective-diffusion transfer in the air are used for mathematical modeling of the pollutants spread of in work areas near the highway during using a suction protection system. The proposed mathematical model makes it possible to take into account wind velocity, turbulent diffusion, the intensity of impurities’ emission from cars, the operation mode of the suction system, the presence of screen on this system. Two finite-difference schemes are used to solve the aerodynamics problem, allowing determining the velocity potential by an explicit formula. The splitting method for the numerical integration of the impurities convective-diffusion transfer equation is used. A computer program for conducting a computational experiment based on the constructed numerical models is developed. Scientific novelty. Numerical models are developed for solving problems of aerodynamics and mass transfer in relation to the task of efficiency assessment of the special suction system using, which allows reducing the level of air pollution in work areas near the highway. Practical value. Based on the developed model, a code is created that allows the rapid calculation of the air pollution process, both near the highway and in the working areas where suction systems for protection is used. Conclusions. Created numerical models allow rapid assessment of using a special suction system installed near the highway. The models take into account the most significant physical factors affecting the pollution areas formation near the highway. Practical application of models does not require the use of powerful computers. The results of the computational experiment are presented.