飞机环控系统建模与换热器参数优化研究

建立了飞机环控系统各主要部件的数学模型和MATLAB仿真模块，在此基础上搭建了某型飞机环控系统的仿真模型，并针对某机型进行了仿真研究。结果表明，模型具有较高的精度。以该系统作为研究对象，以降低系统出口温度为目标函数，从系统角度对换热器流程数和热路流动长度进行了优化。从结果来看，相对于输入参数，换热器的流程数和热路流道长度具有局部最优解，此时压气机、涡轮和换热器之间存在着热量、压力、能量的最优匹配关系。该结论对同类系统的参数确定和优化有一定参考意义。

Modeling of Airplane ECS and Parameter Optimization for Heat Exchanger

Mathematical models for the main components of the airplane air-cycle system and MATLAB simulation modules were constructed. The air-cycle system was built including these component models and the performance of this system was researched. The predicting result agreed with the experimental one. This system was researched as the object, and decreasing exit temperature of the system as the object function. Then heat exchanger parameters-the flow number and flow length in the hot side were optimized as viewed from a system. The result showed that there were partly optimized resolve about these two parameters, depending on the input. And optimized relationship of heat, pressure and energy among the compressor, turbine and heat exchanger existed. The conclusion is significant as the reference to the ascertainment and optimization of the system parameters.