柴油机掺烧生物柴油NO_x和碳烟排放数值模拟  

NO_x and Particulate Emissions Numerical Simulation of Diesel Blended with Biodiesel

作　　者：汤东[1] 李昌远[1] 葛建林[1] 沈飞[1] 刘胜吉[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《农业机械学报》2011年第7期1-4,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家高新技术研究发展计划(863计划)资助项目(2006AA11A1B4);江苏省高校自然科学重大基础研究项目(08KJA480001);江苏高校优势学科建设工程资助项目(PAPD);江苏大学高级人才科研资金资助项目(07JDG086)

摘　　要：利用CFD软件FIRE v2008对186FA型柴油机燃用纯柴油和B20燃油时的燃烧过程进行NOx和碳烟的三维数值模拟,描述了两种燃油的NOx和碳烟生成规律和分布。通过实测示功图对比,验证了氮氧化物模型和碳烟生成模型的准确性。根据数值模拟结果对原柴油机燃用B20时的涡流比和喷油提前角进行了优化,并提出了能同时降低两种排放物的技术方案,涡流比2.7、供油提前角352.5°时,NOx和碳烟排放最优。3-D numerical simulation on NOx and soot emissions of 186FA diesel fueling with pure diesel and B20 fuel was carried out by using CFD software FIRE v2008,the generating rule and distribution of NOx and soot of two fuels were described.Through comparison of the measured indicator diagram,the accuracy of the model was verified.Based on the simulation of the original diesel engine fueling with B20,the swirl ratio and injection advance angle were optimized and the technical programs were proposed to reduce two kinds of emissions simultaneously,which optimized the emissions of NOx and soot when the swirl ratio was 2.7 and injection advance angle was 352.5°.

关 键 词：非道路用柴油机 生物柴油 排放 数值模拟 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]