典型模型加力燃烧室点火性能预测模型研究  

Investigation on ignition performance prediction model of typical model afterburner

作　　者：高天华 刘勇 邓子江 张祥 GAO Tianhua;LIU Yong;DENG Zijiang;ZHANG Xiang(Jiangsu Province Key Laboratory of Aerospace Power System,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏省航空动力系统重点实验室,南京210016

出　　处：《航空动力学报》2025年第2期394-404,共11页Journal of Aerospace Power

基　　金：航空发动机及燃气轮机重大专项基础研究项目(2017-Ⅲ-0007-0033)。

摘　　要：针对蒸发槽、驻涡和凹腔3种典型值班结构的加力燃烧室模型,基于试验和数值仿真研究,建立了适用于3种燃烧室的贫油点火预测模型。从Lefebvre半经验点火模型出发,分析了进气温度、压力和流量对燃油雾化以及贫油点火边界的综合影响机制,替换了其中燃油粒径的半经验模型,形成全部基于进口边界的全经验点火预测模型形式。该模型能够显式体现进气流量对点火的有利和不利作用机制,且3种燃烧室模型贫油点火边界的预测与试验数据误差均小于10%。该建模方法对建立工程级加力燃烧室贫油点火预测模型提供了参考。Based on the experiments and numerical simulation,the prediction models of lean oil ignition for three kinds of afterburner with evaporative slot,cavity and cavity strut were established.According to the Lefebvre semi-empirical ignition model,the comprehensive influence mechanism of inlet temperature,pressure and flow rate on fuel atomization and depleted fuel ignition boundary was analyzed.The semi-empirical model of fuel particle size was replaced,and a fully empirical ignition prediction model based on inlet boundary was formed.The model can explicitly reflect the favorable and unfavorable action mechanisms of inlet flow on ignition,and the error of prediction and experiment data of lean oil ignition boundary of the three combustion chamber models was less than 10%.The model method could provide a reference for the establishment of a prediction model for lean oil ignition in engineering afterburner.

关 键 词：加力燃烧室 值班结构 进口边界 贫油点火性能 点火预测模型 

分 类 号：V231.24[航空宇航科学与技术—航空宇航推进理论与工程]