Abstract:

There are many subsystems such as power supply system, fuel system and environmental control system(ECS) in the high altitude long-endurance unmanned aerial vehicle(UAV).They are independence and also have correlations with each other on the demand and use of the thermal. The new configuration of integrated thermal management about high altitude long-endurance UAV is put forward and the research about the parameters matching among the systems has been done. The preliminary design of the major system compoments is presented and the mathematical models of the compoments are established, such as heat exchanger, reheater, condenser, compressor and turbine. The structure parameters for engineering have been obtained.The computer simulation system of the integrated air-conditioning pack and liquid cooling system is established on the Flowmaster platform. It is presented that the computer simulation results match with design objective very well. The new configuration can make the thermal be integratly used under different working conditions with the heat exchanger which is used to exchange the heat between the air-conditioning pack and liquid cooling system. The aircraft performance penalty is reduced,which can show the superior of the integrated thermal management configuration. As the system configuration optimization is completed with the integrated aircraft thermal management, the target radar cross section (RCS) of the stealth high altitude long-endurance UAV will also be reduced.

Key words: high altitude long-endurance unmanned aerial vehicle, thermal management, compressor, turbine, model, computer simulation

摘要：

高空长航时无人机机载机电系统中，有供电、燃油、液压和环境控制系统等独立分系统，在热量的需求和使用上，它们又是相互紧密关联的。根据现有技术，提出了一种无人机的综合热能管理构型，针对该构型进行系统参数匹配计算，并对关键产品——热交换器、回热器、冷凝器、压气机、涡轮进行部件级的初步设计和仿真建模，得到可工程化的结构参数，并在Flowmaster仿真平台上完成两轮升压式制冷/液冷一体化系统仿真，仿真结果与设计目标匹配良好，用于将空气循环制冷系统与液冷系统热量交换的空-液热交换器，将不同使用工况下不同系统的富裕制冷量进行综合利用，得到综合热能管理可以减少飞机代偿损失的依据，体现出综合热能管理构型在节能方面的优越性。

关键词: 高空长航时无人机, 热能管理, 压缩机, 涡轮, 模型, 计算机模拟