The Research Of Numerical Simulation Of Effects Of Pollution Source On Ventilation System In Lab

In recent years, with the development and application of the computing technology, the level of numerical simulation is higher and higher,so it is available of directly simulating the air distribution with the hydrodynamics, CFD (Computational Fluid Dynamics)has grown a new subject following the development of computer. Currently airflow simulation method is the numerical simulation and experimental model of combining. Numerical simulation is convenient and fast, which could consider various boundary conditions and reflect a full range of indoor airflow. A two-dimensional model and 3D models of the concentration of pollutants with different ventilation and indoor air speed distribution were simulated by CFD technology. Adopted effective simplified method of air supply opening model, the corresponding physical and mathematical models were built up, and the rational layout of the border and initial conditions were accomplished. The concentration distribution of indoor air pollutants was simulated. After containment and ventilation vents of local serious pollution in the region set up, considered staff to the indoor air, numerical simulation of concentration distribution of indoor air pollutants was accomplished. After analysis and comparison of the results, a reasonable airflow method of the rational layout drafts location and rapid evacuation to indoor pollutants was accomplished. The result of the simulation and analysis indicate that the concentration of indoor pollutant can be reduced effectively using suitable velocity of supplying wind. And the ventilation pattern should be accorded with the position of the pollutant source. Moreover, supplying and returning wind from different sides is good for venting pollutant. And officers in indoor should be considered in the simulation of indoor airflow. At the same time indoor air quality and energy-saving air-conditioning should be considered.At last, through the comparisons and analysis of the results of the numerical simulation of different ventilation strategies, the ways of saving energy and improving the indoor air quality can be found. The results can be used to instruct design of the air current forming, and the aim of comfort and health air-CH4nditioning can be achieved.