SIMULATION OF BLEED AIR BEHAVIOR DURING AIRCRAFT IN FLIGHT BASED ON FLOWMASTER

Bleed air system is one of the most important components of air management system(AMS).It acts as transfer pipes responsible for air supply at high temperature and pressure.The thermal and flow performance of the bleed air system is a key issue for the design of AMS since the characteristics of air source have a great influence on the anti-ice system,the environmental control system and other downstream system in need of high temperature pressurized air.Based on the one-dimensional lumped parameter technology,a computer analysis model of bleed air system is developed in order to analyze the thermal and flow behaviors of the nodal points in the pipeline network.The simulation are performed with a given flight assignment using the analysis model,and the results verify that the system meets the design requirements.     

机载蒸发循环制冷系统仿真与试验研究

在MATLAB/SIMULINK环境下建立了机载蒸发循环制冷系统的仿真模型.分别在3种典型工况下对系统进行了仿真计算并在相同工况下在蒸发循环制冷系统试验平台上进行了地面试验,得出了影响系统性能的主要参数和影响程度,以及不同工作状态下各参数的变化规律.通过比较仿真与试验结果,证明仿真结果基本正确,采用蒸发循环制冷系统的仿真方法可行.仿真结果可为机载蒸发循环制冷系统的理论研究和设计提供参考.