甲醇对BD50燃烧、循环变动及排放的影响  

Influence of Methanol Addition on Engine Combustion,Cycle Fluctuation and Performance Fueled with BD50

作　　者：陈昊[1] 赵福磊[1] 李亚鹏[1] 

机构地区：[1]长安大学交通新能源开发、应用与汽车节能陕西省重点实验室,西安710064

出　　处：《内燃机工程》2013年第2期7-11,共5页Chinese Internal Combustion Engine Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(CHD2010JC095);长安大学基础研究支持计划专项基金资助项目

摘　　要：为研究甲醇对生物柴油柴油混合燃料BD50(生物柴油体积比占50%)燃烧、循环变动及性能的影响,在CT2100Q型柴油机上对3种燃料(M0、M5、M10,即在100 mLBD50中分别加入0、5、10 mL甲醇的微乳化燃料)的燃烧、循环、循环变动及排放进行对比试验研究。研究结果表明:与M0相比,1 800 r/min下,M5与M10的燃烧压力曲线及放热率曲线明显滞后,且随负荷增加滞后的幅度增大;最高燃烧压力和最高瞬时燃烧放热率增加,后期放热率明显降低,燃烧更加完全、放热更加集中;最高燃烧压力对应曲轴转角在低负荷时略有滞后,中、高负荷时相同;M10的100循环最高燃烧压力分布最大值降低,循环变动率增加,循环变动加强;碳烟排放明显降低,且降低的幅度随甲醇比例增加而增大;M5的NO_x排放最高,M10与M0的NO_r排放量基本相同。To examine influence of methanol addition in biodiesel-deisel blended fuel, comparative tests were conducted in Model CT2100Q Diesel Engine. Results show that compared with M0, at 1 800 r/min the combustion pressure and instantaneous heat release ratio curves of M5 and M10 delay obviously, and their magnitudes increase with engine load rising; peak combustion pressures and peak instantaneous heat release ratios increase, heat release ratios in later period lower, the fuel burns more completely and heat releases more concentratedly; the crank angles corresponding to peak combustion pressure delay slightly at small load and maintain the same at middle and large loads. Peak combustion pressure distribution of 100 cycles for M10 tends to decrease, cycle fluctuation coefficient and magnitude of peak combustion pressures increase; smoke emission decreases clearly and the magnitude increases with methanol content increasing. NOj emissions of M5 is the highest among the three fuels, and that of M10 is almost same with M0.

关 键 词：内燃机 甲醇 燃烧 循环变动 动力性 排放 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]