航空升压式空气循环制冷组件动态特性的仿真研究

Dynamic Simulation of Bootstrap Air Cycle Refrigeration Components for Aircraft Environmental Control System

详细描述了航空升压式空气循环制冷组件的工作原理。建立了该组件中压气机、涡轮、转轴以及中间冷却器的非线性动态模型。根据部件动态特性的不同时间尺度,分别考虑气体的压力、温度以及转轴转速随时间的变化过程。在MATLAB/SIMULINK系统仿真环境下,采用模块化的建模思想开发了该组件的动态仿真工具箱。以某型飞机环境控制系统的升压式空气循环制冷空气循环制冷组件为例,进行了仿真计算并给出系统的稳态结果和动态过程分析。

The working principle of a bootstrap air cycle refrigeration components is described in detail, such as compressor, turbine, shaft and internal heat exchanger. Based on the performance maps of compressor and turbine, the nonlinear dynamic mathematical models of system are set up. According to the principle of time scale, the dynamic process of airflow pressure, temperature and shaft rotational speed are considered respectively. Using software MATLAB/SIMULINK, the air cycle refrigeration dynamic simulation toolbox for aircraft environmental control system is established with module structure. A typical example of steady simulation result and dynamic process analysis is given in this paper.