航空发动机的非线性模块化建模与仿真

Non-Linear Modular Modeling and Simulation of Aeroengine

采用面向对象建模技术和模块化层次化的架构 ,在发动机非线性数学模型基础上 ,应用Dymola Modelica仿真软件开发了航空发动机模块化仿真模型库 该模型库具有分层结构 ,以及可扩展、标准化的特点 以此模型库为基础 ,用户可以根据需要灵活地建立相应的发动机系统级模型 ,并进行仿真验证 文中采用NASA的数据建立了一个混合排气的航空发动机模型 ,经仿真并与国外仿真结果比较 。

The design and development of new aeroengine is time consuming and expensive, while computational simulation is a promising method to solve this problem. Following the principle of the object-oriented technology and the structure of the engine, we designed and implemented a modular library of aeroengine, based on the non-linear mathematical equations of engine using Dymola?Modelica simulation software. The library is composed of the models for various aeroengine components: compressor, turbine etc., and the structure of the library is hierarchical, extensible and in compliance with standard. To test this library, we constructed a aeroengine model with mixed flow based on some NASA's data and the results of simulation were compared with those from the Gas Turbine Simulation Program. The comparison proves the validity and feasibility of the library.