Mao Yu-Feng, Li Yun-Ze, Wang Ji-Xiang, Xiong Kai, Li Jia-Xin
School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China.
Advanced Research Center of Thermal and New Energy Technologies, Xingtai Polytechnic College, Xingtai 054035, China.
Entropy (Basel). 2019 Feb 26;21(3):223. doi: 10.3390/e21030223.
The aerospace-based heat sink is defined as a substance used for dissipating heat generated by onboard heat loads. They are becoming increasingly scarce in the thermal management system (TMS) of advanced aircraft, especially for supersonic aircraft. In the modern aircraft there are many types of heat sinks whose cooling abilities and performance penalties are usually obviously different from each other. Besides, the cooling ability and performance penalty of a single heat sink is even different under different flight conditions-flight altitude, Mach number, etc. In this study, the typical heat sinks which are the fuel mass, ram air, engine fan air, skin heat exchanger, and expendable heat sink will be studied. Their cooling abilities/capacities, and exergy penalties under different flight conditions have been systematically estimated and compared with each other. The exergy penalty presented in this paper refers to the exergy loss of aircraft caused by the extra weight, drag and energy extraction of various heat sinks. The estimation models, as well as the results and discussion have been elaborated in this paper, which can be can be used to further optimize the TMS of modern advanced aircraft, for example, the layout design of various heat sinks and the improvement the control algorithm.
基于航空航天的散热器被定义为用于消散机载热负荷产生的热量的物质。它们在先进飞机的热管理系统（TMS）中变得越来越稀缺，特别是对于超音速飞机。在现代飞机中有许多类型的散热器，其冷却能力和性能损失通常彼此明显不同。此外，单个散热器的冷却能力和性能损失在不同飞行条件下——飞行高度、马赫数等——甚至也不同。在本研究中，将研究典型的散热器，即燃油质量、冲压空气、发动机风扇空气、蒙皮热交换器和一次性散热器。系统地估计了它们在不同飞行条件下的冷却能力/容量和火用损失，并相互进行了比较。本文提出的火用损失是指各种散热器的额外重量、阻力和能量提取导致的飞机火用损失。本文阐述了估算模型以及结果和讨论，可用于进一步优化现代先进飞机的热管理系统，例如各种散热器的布局设计和控制算法的改进。
