电子吊舱环境控制系统设计的新技术

针对我国军用电子设备吊舱载机电源紧张,国产电子元器件耐温性能相对较差,对环境控制系统要求较高的特点,本文提出了一种新型用冲压空气驱动的环境控制系统.该系统采用"蓄冷节能"的设计思想和逆升压回冷技术,并配备具有智能功能的测控子系统.为克服冲压空气压头低的困难,利用空气动力学理论,提高进气道总压恢复系数,扩大系统进出口压差,从而获得较大涡轮膨胀比.试验结果证明所设计的吊舱环控系统具有良好的制冷性能和经济性.

Advanced Technology in the Design of Environmental Control System for Avionics Pods

To ensure the reliability of equiments mounted in the avionics pods, an environmental control system (ECS) should be equipped in the pod independently. There are two difficulties in designing pod ECS: one is that the aircraft has no enough electrical power to drive the pod ECS; another is that some elements and devices can't suffer higher temperature, which requires a good environmental condition. This paper introduces a new ram air driven ECS for the avionics pods, which adopts the design concept of cool thermal storage for saving energy. The system operates on a reverse bootstrap air cycle and with a regenerative heat exchanger as well as an intelligent control subsystem. To overcome the difficulty of low ram air pressure head, by use of aerodynamic theory, the total pressure recovery σ of the ram air inlet is raised and the differential pressure between the inlet and outlet air of the ECS is increased, therefore, the greater expansion ratio ε of the cooling turbine is acquired. Test results demonstrate that the designed system has good performance.