基于流体网络拓扑的航空发动机及燃气轮机整机性能建模方法

Modeling Method of Engine Performance for Aeroengine and Gas Turbine Based on Fluid Network Topology

为了快速、灵活、自由地搭建航空发动机及燃气轮机不同构型整机性能仿真模型,提出了一种基于流体网络拓扑的发动机整机性能仿真模型方案。从发动机部件及整机性能模型建模基本原理出发,在现有面向对象的部件性能建模及通用仿真系统总体框架基础上,采用迭代变量和平衡方程组与发动机部件模型和部件模型计算顺序相关联技术,建立了适用于不同航空发动机和燃气轮机类型的稳态性能仿真模型,并将该模型计算结果与成熟的商用仿真软件计算结果进行了对比分析。结果表明:该方案、模型可以实现发动机计算模型/拓扑自动构建,以及迭代变量与平衡方程组自动构建,提高了仿真系统的适用性。

In order to quickly,flexibly,and freely build performance simulation models of aeroengines and gas turbines with different configurations,a general simulation model scheme for engine overall performance based on fluid network topology was proposed.Starting from the basic principle of performance modeling of engine components and whole engine,and based on the existing object-oriented component performance modeling and general simulation system framework,by using the iterative parameter vectors and balance equations to associate engine component models and component model calculation sequences,a set of steady-state performance simulation models suitable for different types of aeroengines and gas turbines were established,and the calculation results of these model were compared and analyzed with those of mature commercial simulation software.The results show that the scheme and model can achieve automatic construction of engine calculation models/topologies,as well as the automatic construction of iterative variables and balance equations,solving the key problem of building a modular engine performance simulation model freely and improving the applicability of the simulation system.