چكيده به لاتين
Abstract
Railway transportation has many advantage in human life, but it has many disadvantage like production of suspended solid particles and release them to the air. These particles do not have a high concentrations in the open air, but there is a different case at underground railway transport systems. Solid particles are transported by subway to various stations. This issue has the great importance because people in the stations breathe in the same pollute air, that in the short and long time leads to various respiratory diseases, including tuberculosis. In this project, firstly, the types of pollutants produced by the metro and their sources are introduced, and methods for sampling and simulating the suspended particles flow in the world's advanced metro are represented. Then, the theory of suspended particles flow is introduced as the main basis of particle motion simulation in this study. Modeling and simulating of three-dimensional fluid flow in FLUENT software using moving mesh and k-e solution method with wall standard function. The validation of this simulation results are compared with the field suspended particles measurements results at the subway station with sampling pump. The measurement of suspended particles in this study was carried out in two parts, particle concentration and particle size estimation at primary, mid, and end areas of the subway station, which measured particle sex for the first time in similar studies. The final result showed that the concentration of suspended particles in the middle zone of the station was higher than other areas and the particles were in the breathing range of the present people at the subway station. The particles detected in this range are mainly asbestos, lead, manganese oxide and iron oxides whose concentrations can be in a dangerous range for human health and safety. Finally, there are several suggestions for solving this problem
Keywords: Subway, suspended particles, suspended particles measurement, FLUENT, safety and health
