摘要
以正庚烷-正丁醇-多环芳香烃-甲苯简化机理作为正丁醇-柴油混合燃料燃烧化学反应动力学机理,应用AVL-FIRE软件耦合CHEMKIN建立三维数值模型,研究了进气状态(进气压力、进气温度和进气涡流比)对正丁醇-柴油混合燃料低温燃烧多环芳香烃(PAHs)生成的影响规律.结果表明:随着进气压力和进气温度的提高,PAHs各组分的生成时刻提前,缸内最终生成量增加,尤其是A2(菲)和A4(芘);在燃烧后期,随着进气压力和进气温度的提高,PAHs各组分消耗速率加快;随着涡流比的增加,PAHs各组分生成时刻提前,A1(苯)、A2(菲)和A3(萘)缸内最终生成量增加.当涡流比从1.2变化到1.6时,A4(芘)的缸内最终生成量随涡流比的增加而减少;而当涡流比从1.6变化到2.4时,A4的缸内最终生成量随涡流比的增大而增加.
Combustion model of engine was built using the AVL-FIRE software coupled with CHEMKIN,and the n-heptane-n-butanol-PAH-toluene reduced mechanism was used as the n-butanoldiesel blend fuel combustion chemical kinetics mechanism to study the effect of inlet state(including intake pressure,intake temperature and swirl rate)on the formation of PAHs in low temperature combustion fuelled with n-butanol-diesel blends. Results show that,with the increase of intake pressure and intake temperature,the formation timing of PAHs is advanced,and final residues of PAHs are increased in the cylinder especially the A2(phenanthrene) and A4(pyrene). At the end of combustion,with the increase of intake pressure and intake temperature,the consumption rate of PAHs is speeded up. With the increase of swirl rate,the formation timing of PAHs is advanced,and final residues of A1(benzene),A2,A3(naphthalene)are increased in the cylinder. When swirl rate changes from 1.2 to 1.6,the final residues of A4 is decreased. While changing the swirl rate from 1.6 to 2.4,the final residues of A4 is increased.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2014年第5期399-406,共8页
Transactions of Csice
基金
国家自然科学基金资助项目(51076033)
广西自然科学基金资助项目(2014GXNSFGA118005
2012GXNSFAA053206)
广西高等学校优秀中青年骨干教师培养工程资助项目
关键词
正丁醇-柴油
进气状态
低温燃烧
多环芳香烃
n-butanol-diesel
inlet state
low temperature combustion
polycyclic aromatic hydrocarbons(PAHs)
