民机冲压空气系统流动特性仿真研究  

Simulation study on flow characteristics of ram air system for civil aircraft

作　　者：杨艺菲 王赟[1] 杨胜华[1] 刘超[1] YANG Yifei;WANG Yun;YANG Shenghua;LIU Chao(Shanghai Aircraft Design and Research Institute,Shanghai 201210,China)

机构地区：[1]上海飞机设计研究院,上海201210

出　　处：《民用飞机设计与研究》2022年第3期56-60,共5页Civil Aircraft Design & Research

摘　　要：民机冲压空气系统通过机身蒙皮开口引入外界空气为飞机空调系统、辅助冷却系统和惰化系统提供合适压力与流量的冷源,其性能的优劣影响飞机的经济性与舒适性。冲压空气系统包括了进排气口、换热器、风扇和管路等部件,其内部的复杂流动特性决定了冷源流量在各个用户系统中的分配。为了在冲压空气系统的设计过程中根据各用户系统的需求完成合适的流量分配,需要通过冲压空气系统流动特性的三维仿真计算来获得。针对冲压空气同时受到机外环境和内部部件影响的特点,建立了机外远场和内部各部件仿真计算模型,通过CFD方法实现了冲压空气系统内部三维流动趋势的计算,获得了冲压空气系统流量分配结果和流道内的压力分布,为冲压空气系统的整体设计提供了参考。The ram air system of civil aircraft brings the environmental air through the inlet apparatus on the aircraft skin and applies the cool air with applicable pressure and air flow rate for air condition system, supplemental cooling system and auxiliary propulsion system, which affects the economic and comfortable performance of the aircraft. The ram air system consists of the inlet apparatus, the outlet apparatus, the heat exchangers and the fan and the ducts. The complex flow characteristics determine the cool air flow distribution for each user. In order to obtain the proper air flow distribution of ram air, the three-dimension simulation method needs to be established. Because the aircraft outside environment and the inside components were affect the performance of the ram air performance, the numerical models for outside part and inside part were established. CFD method was used to calculate the flow trend in the ram air channel, and the flow distribution results of the ram air system and static pressure distribution in the channel were obtained, which can provide an example for the global design of ram air system.

关 键 词：冲压空气 流动特性 数值仿真 流量分配 

分 类 号：V211.4[航空宇航科学与技术—航空宇航推进理论与工程]