Numerical Simulations Of Particles Transport And Distribution In Passenger Compartment

The air quality of passenger compartment has a close relationship with passengers'health, and could directly influence traffic safety. With the development of automobile industry, the car has gradually become an essential means of transport in daily life. The frequency of using cars for everyone is also increasing. Therefore, it is very significant to analyze the factors affecting air quality in the car, research the transport and dispersion of relevant contaminants, and find out feasible improvement measures so as to supply a clean and healthy internal environment.To improve the internal environment quality of passenger compartment, this work takes the passenger compartment of a car model as research object and carries out a study of the transport and dispersion of the main pollutants in the car, i.e. particulate pollutants, under comfortable air supply condition by using numerical methods. After that, the results obtained were studied for application. The following are the main contents of this paper:Firstly, air distribution, wind velocity, temperature distribution and humidity in passenger compartment are analyzed by establishing a flow and heat transfer model and computing different operation conditions under different air supply patterns and wind of automobile Air-condition. With the aid of PMV-PPD index, the thermal comfort of passenger compartment was evaluated. And, this work also pays attention to the comfort zone proportions of whole zone and driver zone in different air supply conditions by UDF program.Then, on the basis of comfortable air supply condition in passenger compartment, the transport and dispersion of smoke particle, the representative of internal particle pollutions, and diesel exhaust particle, the representative of internal particle pollutions, are studied. In the meanwhile, the impact of different air supply parameters, such as temperature, velocity and direction, on particles transport and dispersion is analyzed. Moreover, the contaminant age index and the contaminant residential time index are used for researching the removal capacity to the diesel exhaust particles for passenger compartment.Finally, for the purpose of simultaneous control to thermal comfort and air quality for special zone in the passenger compartment, partition control technology is researched. And, the optimum air supply parameters against this background are obtained by accomplishing the two-objective optimization of thermal comfort proportion of driver zone and contaminant age index. In this way, the design ideas of automobile partition air-conditioner are to broaden.