航空发动机燃烧室贫油熄火极限预测方法综述

航空发动机燃烧室贫油熄火极限的预测方法研究对于全面掌握燃烧室性能和有效工作范围,进而对提高燃烧室设计水平,完善中国航空发动机设计体系,有着重要的理论和工程意义。在总结国内外相关研究的基础上,对适合于工程应用的预测方法进行了归纳总结,其中包括半经验模型、火焰体积法、基于数值计算的Lefebvre经验公式、等效反应器网络图法、火焰前锋法和RANS燃烧流场特征法。针对每种方法,详细阐述了其特点,并对存在的问题进行了分析。最后,提出了完善贫油熄火预测方法的一些建议。

Overview of Lean Blowout Limit Prediction Methods for Aeroengine Combustors

The investigations on lean blowout limit prediction method of an aeroengine combustor play a significant role in fully understanding the combustor performance and effective operational range, improving the combustor design level and refining the aeroengine design system in terms of theoretical and engineering views. The lean blowout limit prediction methods were reviewed based on summarizing the relevant research at present, which were suitable for engineering applications. The methods include semi-empirical model, flame volume model, Lefebvre empirical correlation based on numerical simulation results, equivalent reactor networks model, flame front model and combustion field characteristics model. The features of each method were presented in detail and existing problems were also analyzed.Finally, some suggestions on improving the lean blowout limit prediction method were proposed.