High-speed train facilitate people’s travel, reduce the travel time markedly. Meanwhile, the requirements of health and riding comfortableness were getting higher and higher along with the improvement of living standards. Therefore, the air quality of flow field inside is getting more and more attention from designers and passengers. Harm of the dust is get more and more attention in recent years, dust polluting condition of atmospheric environment is worrying. For high-speed air-conditioned train which has relative sealed, dust enter into passenger room with fresh air will influence air quality of the passenger room. Thus, it is quite necessary to simulate the dust concentration distribution inside the train as the train running at a high speed.By means of the finite volume method which is wide application on fluid mechanics, the dust concentration distribution of high-speed air-conditioned train in passenger compartment were calculated numerically based on three dimensional N-S equation of compressible viscous fluid and Lagrange discrete phase mode(DPM)and two-equation κ-ε turbulent model. First, the dust distribution of passenger compartment in high-speed air-conditioned train was calculated when the speed of the train is350km/h, then the influencing factors of the dust distribution was analyzed; secondly, the dust concentration of the flow field in passenger compartment with different atmospheric conditions was calculated, then dust was filtered by installed strainer, the calculate result was contrasted to Indoor Air Quality Standard (IAQ) to ensure the strainer parameters; finally, the different dust concentration of several typical evaluation criteria were contrasted, at the same time, the method of control the dust distribution was discussed.The results show that dust distribution is influenced by turbulence intensity, the dust distribution is uniform at zone with high-turbulence (such as air supply output and exhaust outlet) and cumulate at zone with low-turbulence(such as underneath seat and corners); the average dust concentration is growing as time goes by and change slowly900s later; it will be fall off significant by installed strainer; when the speed of the train is350km/h, the average PM10concentration of the flow field in passenger compartment is up to the IAQ standard when environment air quality is first and second level, exceeding the IAQ standard when environment air quality is third level. The strainer which sieve size around the quality median diameter of the dust distribution has better filtering effect; to up to the dust concentration value of the IAQ standard, it should be selected strainer which filter meshes is1250when environment air quality is first and second level, selected strainer which filter meshes is2500when environment air quality is third level. Act on the premise that reach the filtering effect, strainer selected should reduce the influence of the mesh pressure drop on the train flow field. To reach the requirements of riding comfortableness and health, different filter method or air supply method can be adopted. |