采用CFD技术对轿车车室内的流场进行数值模拟计算,着重对比了在相同条件下,回风口分别位于仪表台下侧和后排座椅后侧,这两种不同的风口布置下的车室内温度场和速度场分布规律。并且运用不均匀系数、有效温度差、空气分布特性指标等评判指标对车内的温度场、速度场及热舒适性进行评价分析。计算分析结果表明回风口的布置对轿车室内的气流组织及热舒适性具有明显影响。 CFD technology is used to simulate the flow field in a car car. Emphatically contrasting the return air vents are located on the lower side of the dashboard and the rear side of the rear seat under the same conditions. The two different vents Temperature field and velocity field distribution law. The temperature field, velocity field and thermal comfort in the vehicle are evaluated and evaluated by using the evaluation indexes such as non-uniform coefficient, effective temperature difference and air distribution characteristic index. The calculation and analysis results show that the arrangement of the return air outlet has a significant effect on the air flow organization and thermal comfort in the passenger compartment of the car.