摘要
为分析滑油系统特性,研究其与航空发动机协同工作及设计问题,基于滑油系统元部件的流量、压力和换热特性在MATLAB/Simulink下开发了通用仿真模块库,构建了包含供油、回油、通风和热力系统的全系统仿真模型.以某型涡扇发动机及其滑油系统为例,计算了高温起飞工况下滑油系统主要工作参数值,并与商业软件Flowmaster对比计算结果,相对误差保持在3.8%以下.利用全系统仿真模型的拓展性,成功与GasTurb发动机模型进行联合仿真,使用遗传算法优化滑油系统设计参数,通过改变供油分配比例使最高回油温度降低4.12%,可为滑油系统的设计及改进提供参考.
In order to analyze the oil system＇s characteristics and study the coperative working and design problems involving aero-engine, a general simulation block library for its components was developed in MATLAB/Simulink based on flow rate, pressure and heat transfer characteristics. Then a full-system simulation model was established, including sup- ply, return, air and thermal system. Taking a certain turbofan engine and its oil system as example, the main working parameters of the oil system were calculated under high tempera- ture taking off condition. Compared with the calculated values of Flowmaster model, the relative error was less than 3.8 %. Through the extension ability of the full-system simulation model, a co-simulation with GasTurb engine model was successfully implemented and the oil system＇s design parameters were optimized through genetic algorithm. The highest temperature of return oil decreased by 4.12% by changing the oil supply ratio. This method can provided a reference for oil system design and improvement.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2017年第3期740-748,共9页
Journal of Aerospace Power
基金
商用飞机发动机关键技术攻关项
