摘要
飞机空调冷却系统通过冲压空气进气道引入冷却空气。为了给飞机电子设备散热提供更大的冲压空气引气量,考虑在冲压空气进气道中安装引射器。针对5和10 km两种飞行高度,采用数值方法研究了飞行马赫数为0.2~1.2的冲压空气进气道以及冲压引射进气道流场。研究结果表明,在同一高度上,冲压引射进气道内的质量流量增比随着飞行马赫数的增大而减小。在低空低速时(飞行高度为5 km,飞行马赫数为0.2),引射器对增加引气量的效果较好,冲压空气进气道内引气量提升约为96.87%。本文的冲压空气引射进气道研究可以为飞机空调冷却装置的改进提供理论参考。
The cooling air is introduced to air conditioning cooling system of aircraft through ram air inlet duct.In order to provide more ram air mass flow for the heat dissipation of aircraft electronic equipment,an ejector is considered to be installed in the ram air inlet duct.In view of the two flight heights of 5 km and 10 km,a numerical method is used to study the flow field of ram air inlet duct with and without ejector with flight Mach number of 0.2—1.2.The results show that,at the same height,the mass flow increase ratio in the ram?air inlet duct with ejector decreases with the increase of the flight Mach number.At low height and low speed(the flight height is 5 km and the flight Mach number is 0.2),the ejector has a better effect on increasing the mass flow rate,and the increase of the mass flow rate in the ram air inlet duct is about 96.87%.Thus,the research in this paper can provide theoretical reference for the improvement of air conditioning cooling device for aircraft.
作者
张田野
孙智
孙建红
张书晔
许常悦
ZHANG Tianye;SUN Zhi;SUN Jianhong;ZHANG shuye;XU Changyue(College of Aerospace Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing,210016,China;Shenyang Aircraft Design and Research Institute,Shenyang,110035,China)
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2019年第4期486-492,共7页
Journal of Nanjing University of Aeronautics & Astronautics
基金
江苏高校优势学科建设工程资助项目
关键词
冲压空气进气道
引射
流量
数值模拟
ram air inlet duct
ejector
mass rate flow
numerical simulation