TeLESSⅡ低排放燃烧室预燃级设计对排放的影响

民用航空发动机需要满足国际民航组织（ICAO）发布的排放标准的要求,因此低排放燃烧室的研制是发动机成功研制的关键。TeLESSⅡ低排放燃烧室方案研究了在主燃级空气流动和燃油喷射模式不变情况下,成膜空气雾化和离心喷射空气雾化两类不同的预燃级空气流动和雾化组织模式在不同工况时对排放趋势变化的影响。结果表明小工况时不同预燃级的排放及燃烧效率变化趋势方向不同。大工况时两者的排放受燃油分级比影响变化趋势不同,而燃烧效率变化趋势是一致的。这说明预燃级和主燃级的组合设计改变了燃烧性能。 

Effect of pilot design in the TeLESSⅡ low emission combustor on emission

Commercial aircraft engine needs to satisfy International Civil Aviation Organization (ICAO) emission standards,the low emission combustor research and development is the key to make the engine development successful.TeLESS Ⅱ low emission combustor scheme was used to research the gas emissions property of two different pilot stage designs,namely,prefilming airblast atomizer and airblast simplex atomizer,with the same main stage air flow and fuel atomizing module.The results indicate that in low condition with different pilot stage designs,the emissions and combustion efficiency changes are different.In the high condition,according to fuel staging ratio,the emissions have different change trends,and the combustion efficiency change trend is the same.Those illustrate that the combination of pilot stage and main stage design change the combustion properties.