可控活化热氛围中不同混合比生物柴油的燃烧特性  

Characteristics of the Biodiesel Combustion in a Controllable Active Thermo-Atmosphere

作　　者：张旭升[1] 李理光[2] 吴志军[2] 邓俊[2] 黄成杰[1] 于水[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030 [2]同济大学汽车工程学院,上海200092

出　　处：《燃烧科学与技术》2008年第2期127-131,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金(50676055);国家高技术研究发展计划(863)资助项目(2006AA11A1A2);上海市青年科技启明星计划资助项目(07QA14055)

摘　　要：介绍了在可控活化热氛围中采用高速摄影对生物柴油和柴油混合燃料燃烧特性的研究.结果表明,随着生物柴油体积分数的增加,滞燃期呈现先减小后增大的趋势,但所有混合燃料的滞燃期都低于普通柴油.随着协流温度的增加,纯生物柴油的滞燃期逐步下降.而生物柴油燃料体积分数的增加,则会逐步降低燃烧持续期,略微增加燃料氧质量分数就可以明显降低燃烧持续期.同时,燃料喷射自燃的位置分布更加广泛.Experiments were conducted in a vitiated coflow burner with a high-speed video camera to study the biodiesel combustion characteristics. The results show that with the increase of the biediesel concentration, ignition delays of blend fuels decrease at first and then increase,but all the delays are shorter than that of diesel. Ignition delay of pure biodiesel decreases gradually with the increase of the coflow temperature. The combustion duration significantly decreases as biodiesel concentration increases. Moreover, slightly increasing oxygen concentration of the blend will significantly reduce combustion duration. Simultaneously, the distribution of ignition points is further widened as blend concentration of biodiesel increases.

关 键 词：生物柴油 可控活化热氛围 燃烧特性 滞燃期 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]