机载多支路液体冷却系统仿真研究

以机载液体冷却系统为研究对象，利用Simulink软件建立了串联式和多 支路并联式液冷系统模型，并对两种系统的特性进行了对比分析。采用PID控制调节支路流量，对变工况条件下的多支路系统进行动态仿真计算。分析了电子设备工况、飞行高度以及飞行马赫数对系统的影响。结果表明：多支路并联式系统的阻力更小；针对不同工况，多支 路系统可满足不同热载荷电子设备的冷却要求；飞行高度的降低和飞行马赫数增大均会导致多支路系统温度的上升。

Simulation on Airborne Multi-Branch Liquid Cooling System

To research the airborne liquid cooling system, this paper uses software Simulink to build the mathematical model of each component in the single-branch series connection system and multi-branch parallel connection system. The characteristics of systems are compared and analyzed. PID control is used for branch flow regulation in multi--branch system, and the dynamic simulation of multi-branch system is subsequently performed under given conditions. Moreover, the influence of avionics operating condition, flight altitude and flight Maher number on the system is analyzed. The result shows that the flow resistance of multi-branch system is lower, the flow of each branch is carried out according to the thermal load of the electronic equipment in different working conditions in multi-branch system, and a lower flight altitude or a larger flight Mach number will lead to a higher temperature of system.