耗散修正湍流模型在有个性通风机舱气流模拟中的应用

Application of a Modified Dissipation Turbulent Model to the Airflow Simulation in Aircraft Cabin with Personalized Vents

针对机舱大空间与局部个性通风口之间的高比例尺度问题给舱内气流数值模拟带来的网格质量与数量挑战,通过引入适于个性通风口圆射流的数值耗散修正模型(MDR k-ε湍流模型),并采用合理的机舱网格尺度配比,实施了有温差单排机舱舱内气流流动特征的数值模拟.通过与实验对比,验证了模型的可靠性,进而数值探究了个性通风口射流作用对舱内气流和乘客舒适度的影响,为舱内颗粒污染物控制的进一步研究提供了基础.

With respect to the challenge of grid quality and quantity caused by the problem of high scale ratio of large space in the craft cabin to local personalized vents for airflow numerical simulation, the k-c turbulent model with modified dissipation rate （MDR k-e turbulent model） suitable for the round jet flow of personalized vent was presented and the reasonable mesh scale-ratio of the cabin with vents was firstly determined. Then, the modified turbulent model was applied to simulate the airflow in non-isothermal single-row cabin, and by comparing the simulated results with experimental data, the applicability of this model was verified. Furthermore, the effect of the jet flow of per- sonalized vents on the cabin airflow and human body thermal comfort was analyzed and discussed, and the results can provide detailed airflow information for the further study of the particulate contaminant transmission in passenger aircraft cabin environment.