生物原油与传统航空煤油在长直链烷烃与芳香烃含量上具有显著差异,为了研究航空替代燃料在燃烧排放方面的特性,选择了正十六烷和丁基苯两种代表性物质作为添加物,研究其对燃烧过程中排气冒烟的影响。另外,研制了适用于航空发动机燃烧室地面试验的颗粒物稀释采样装置,该装置采用了先进的稀释采样技术,模拟发动机排气进入到环境大气中的真实变化过程,具有全面性、连续性、小型化的特点。试验结果显示,芳香烃类物质的含量会显著提高颗粒物的排放浓度,而长直链烷烃则会带来更大的颗粒物微团。稀释采样装置为航空发动机排放测试提供了新的技术途径,试验结论为人工合成航空替代燃料以降低排气冒烟提供了技术支持。 Bio-crude oil and traditional aviation kerosene have significant differences in long-chain paraffins and aromatic hydrocarbons. In order to study the characteristics of aviation alternative fuels in terms of combustion emissions, two representative substances, n-hexadecane and butyl benzene, were selected as additives , To study its impact on exhaust smoke during combustion. In addition, a particulate dilution sampling device suitable for the ground test of aeroengine combustor has been developed. The device uses advanced dilution sampling technology to simulate the real changing process of the engine exhaust into the ambient atmosphere. The device has the characteristics of comprehensiveness, continuity, The characteristics of the Test results show that the content of aromatic hydrocarbons will significantly increase the concentration of particulate emissions, while the long linear paraffin will bring greater particulate micelles. Dilution sampling device provides a new technical approach for aeroengine emission testing. The experimental conclusion provides technical support for the synthetic aviation alternative fuels to reduce exhaust smoke.