空调列车室内流场的数值模拟

Numerical Simulation of Airflow Organizing in Air-Conditioned Railway Passenger Cars

用传统的方法计算空调列车的室内气流组织,通常不能计算考虑太阳辐射引起室内负荷的再分配,计算结果具有较大的局限性.首先由Monte-Carlo和Gebhart方法计算出了太阳辐射在各个壁面上的分配,并以此为基础建立了空调列车气流组织数值模型的边界条件.采用双方程模型作为控制方程进行了数值求解,与实验结果对照表明,数值计算所建的物理、数学模型及简化措施是合理的.

Using traditional calculation method to calculate the air current in air conditioned train can not take into consideration heat load redistribution on faces of sun radiation and the result is limited.This paper applies the Monte-Carlo methodin and Gebhart method in simulating the distribution of sun radiation in every wall,and this can be boundary condition for numerical model.Carrying out the numerical simulation of airflow organizing by using double equation model as control equation.The tests show that the physical and mathematical model in numerical computation is reasonable.