The Aerodynamic Numerical Simulation And Optimization Of The Car

With the development of highway and the increasing of vehicle velocity, the require of control stability, security and inhabited comfort are higher than before. Especially with the lake of word energy source and the increasing of oil price, how to improve the economic character turns to the most important article. The vehicle's aerodynamic character directly affects the dynamic, economic and control stability characters. So design the vehicle with better aerodynamic is the key to all of the problems above.Wind tunnel is the traditional method of aerodynamic research of vehicle, which is not suit to develop the fasten safer N more comfortable and economical vehicle, because long research period and much money is needed, and there are jam effect> road effect. Further more, the wind runnel method can not give the velocity of the flow and tress distributing of the vehicle.The numerical simulation provides a new tool to the aerodynamic research of the vehicle, with the development of computer and compute technology. Of later years, the importance and the using field of numerical simulation are rapidly increasing. During the prophase of vehicle design, numerical simulation can conveniently and visually give the aerodynamic situation of every parts, approximately give the resistance quotiety (CD), prepares for the next design of the detail, which greatly reduce the period and money of vehicle development.The result of calculation and optimization is discussed in the article, which make some useful attempts in aspect of practicality of the flow numerical simulation.