为研究机载蒸发循环制冷系统关键部件耦合特性及交界面参数对系统性能的影响规律，基于AMESim-Python联合仿真平台搭建了机载蒸发循环系统模型，并开展了系统开环特性研究。在额定工况下，通过改变压缩机转速、膨胀阀开度、低温PAO参数以及高温PAO参数，分析了各参数对系统蒸发压力、换热量等关键参数的影响规律。结果表明：压缩机转速升高导致制冷剂流量增加、蒸发压力下降、制冷系数减小；膨胀阀开度在40%时系统换热量达到峰值，超过50%后出现蒸发不完全现象；低温PAO流量在150L/min后对系统影响趋于稳定，温度升高对性能提升明显；高温PAO入口温度影响显著，温度升高导致冷凝压力激增、制冷系数下降。所建立的联合仿真模型融合了AMESim在物理机理建模上的精度优势与Python在算法集成与交互设计上的灵活性，获得了当前部件参数和工况设定下的系统特性和影响规律，为机载热管理系统的优化设计与控制策略制定提供理论依据。

To investigate the coupling characteristics of key components in airborne vapor cycle systems and the influence of interface parameters on system performance, a model of airborne vapor cycle systems was developed based on an AMESim-Python co-simulation platform, with open-loop characteristic studies conducted. Under rated operating conditions, the effects of varying compressor speed, expansion valve opening, low-temperature PAO parameters, and high-temperature PAO parameters on critical system parameters such as evaporation pressure and heat exchange capacity were analyzed. Results show that increasing compressor speed leads to higher refrigerant flow rate, reduced evaporation pressure, and decreased coefficient of performance; the system reaches maximum heat exchange capacity at 40% expansion valve opening, with incomplete evaporation occurring when the opening exceeds 50%; the influence of low-temperature PAO flow stabilizes after reaching 150 L/min, while temperature elevation significantly enhances performance; high-temperature PAO inlet temperature exerts a pronounced impact, where temperature increase causes sharp condensation pressure rise and COP decline. The established co-simulation model integrates AMESim’s advantages in physical mechanism modeling accuracy with Python’s flexibility in algorithm integration and interactive design, successfully capturing system characteristics and influencing patterns under current component parameters and operational settings. This provides theoretical support for optimizing the design and control strategies of airborne thermal management systems.