某型涡扇发动机部件老化对性能影响的分析与计算

Effect of component deterioration on turbofan engine performance

详细分析了部件老化对发动机性能影响的机理.利用所能得到的统计数据,基于部件匹配技术,通过将考虑部件老化影响的部件特性嵌入到发动机稳态性能计算模型中,建立了考虑部件老化的发动机性能计算模型,采用Newton-Raphson迭代收敛技术求解非线性方程组,获得考虑部件老化影响的发动机性能.以某型涡扇发动机为例,定量地计算分析了部件老化对发动机性能的影响,计算结果和发动机实际试车数据对比具有较好的一致性,表明本文发展的方法是合理的.

The effect of component deterioration on engine performance is considerable. This influence can not be easily computed with normal engine steady performance computer program. A new mathematical method and computer program were developed to accurately compute the effect of component deterioration on engine performance. First, the mechanisms of the effect of component deterioration on engine performance were analyzed; then, statistical method was used to calculate this influence. Taking a turbofan engine as an example, the effect of component deterioration on engine performance,such as specific fuel consumption and temperature at turbine inlet was computed with this method, and compared with experimental data. The results indicate that the mathematical model in this paper can be used to compute the effect of component deterioration on engine performance.