扇形段与全环燃烧室熄火性能换算研究

为研究不同类型燃烧室试验件熄火性能之间的关系,开展了扇形段和全环燃烧室的熄火性能试验.通过试验对比了二者熄火规律的相似性和差异性,并分析了造成差异的主要因素.以Lefebvre熄火模型为基础,结合雾化数据,拟合得到扇形段与全环燃烧室的贫油熄火经验关系式,并推算出二者熄火性能的定量换算公式.结果表明:扇形段与全环燃烧室的熄火边界变化规律类似,但在相同的工作状态条件下,全环燃烧室的贫油熄火油气比小于扇形段的相应值.

Conversion Investigation on Blowout Performance for Multi-Sector and Full Annular Combustors

An experimental research was conducted to study the relationship between blowout performances of multi-sector and full annular combustors, comparing similarities and differences between lean blowout performances of the two combustors and the major factors leading to the differences were analyzed. Based on the atomization data and the Lefebvre''s blowout model, empirical lean blowout limit correlation of both combustors were summarized. The conversion formulas of blowout performances for multi-sector and full annular combustors were derived. The results show that the multi-sector and full annular combustors share similar lean blowout limit changing pattern while the lean blowout data of full annular combustor is lower than that of the multi-sector combustor in the same condition.