本文主要研究内容
作者（2019）在《喷射策略对低负荷下天然气-柴油双燃料预混压燃燃烧的影响研究》一文中研究指出：双燃料预混压燃(dual-fuel premixed charge compression ignition, DF-PCCI)燃烧因其氮氧化物(NOx)和颗粒物(PM)排放低而被认为是重载压燃发动机中传统柴油燃烧的可行替代方案。当天然气(NG)应用于DF-PCCI发动机时,其低反应活性降低了高负荷下的最大压升率。然而,天然气-柴油DF-PCCI发动机在低负荷工况运行时存在燃烧效率低的问题。为了降低低负荷工况下的燃料消耗率、未燃碳氢化合物(HC)和一氧化碳(CO)排放,本文研究了DF-PCCI发动机中供给燃料(天然气和柴油)的喷射策略。研究发现,天然气替代率和柴油喷射时刻(start of energizing, SOE)的改变有效地控制了燃料-空气混合气的形成。采用柴油两次喷射策略可以调节混合气的局部反应活性。预喷柴油SOE的延迟和预喷柴油喷射量的减少有利于降低燃烧损失。废气再循环(EGR)的引入通过推迟燃烧相位改善了燃料经济性并将NO_x和PM排放降低至欧六(EuroⅥ)标准以下。结合40%天然气替代率,柴油两次喷射策略和中等EGR率可以在低负荷工况下有效提高燃烧效率与指示效率,并降低HC和CO排放。
Abstract
shuang ran liao yu hun ya ran (dual-fuel premixed charge compression ignition, DF-PCCI)ran shao yin ji dan yang hua wu (NOx)he ke li wu (PM)pai fang di er bei ren wei shi chong zai ya ran fa dong ji zhong chuan tong chai you ran shao de ke hang ti dai fang an 。dang tian ran qi (NG)ying yong yu DF-PCCIfa dong ji shi ,ji di fan ying huo xing jiang di le gao fu he xia de zui da ya sheng lv 。ran er ,tian ran qi -chai you DF-PCCIfa dong ji zai di fu he gong kuang yun hang shi cun zai ran shao xiao lv di de wen ti 。wei le jiang di di fu he gong kuang xia de ran liao xiao hao lv 、wei ran tan qing hua ge wu (HC)he yi yang hua tan (CO)pai fang ,ben wen yan jiu le DF-PCCIfa dong ji zhong gong gei ran liao (tian ran qi he chai you )de pen she ce lve 。yan jiu fa xian ,tian ran qi ti dai lv he chai you pen she shi ke (start of energizing, SOE)de gai bian you xiao de kong zhi le ran liao -kong qi hun ge qi de xing cheng 。cai yong chai you liang ci pen she ce lve ke yi diao jie hun ge qi de ju bu fan ying huo xing 。yu pen chai you SOEde yan chi he yu pen chai you pen she liang de jian shao you li yu jiang di ran shao sun shi 。fei qi zai xun huan (EGR)de yin ru tong guo tui chi ran shao xiang wei gai shan le ran liao jing ji xing bing jiang NO_xhe PMpai fang jiang di zhi ou liu (EuroⅥ)biao zhun yi xia 。jie ge 40%tian ran qi ti dai lv ,chai you liang ci pen she ce lve he zhong deng EGRlv ke yi zai di fu he gong kuang xia you xiao di gao ran shao xiao lv yu zhi shi xiao lv ,bing jiang di HChe COpai fang 。
论文参考文献
论文详细介绍
论文作者分别是来自Engineering的，发表于刊物Engineering2019年03期论文，是一篇关于双燃料论文,反应可控压燃论文,预混压燃论文,天然气论文,喷射策略论文,废气再循环论文,Engineering2019年03期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自Engineering2019年03期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：双燃料论文; 反应可控压燃论文; 预混压燃论文; 天然气论文; 喷射策略论文; 废气再循环论文; Engineering2019年03期论文;