河北科技大学学报2017，Vol.38Issue(6)：530-535,6.DOI:10.7535/hbkd.2017yx06004
氢燃料内燃机NOx排放特性及机理
Characteristics and mechanism of NOx emission of hydrogen fueled internal combustion engine
摘要
Abstract
In order to deeply study the NOx formation mechanism of hydrogen fueled internal combustion engine (HICE),a hydrogen fueled internal combustion engine CFD simulation model including three-dimensional gridding coupling detailed chemical reaction mech-anism is built based on CONVERGE software,and the combustion and emission characteristics of hydrogen fueled internal combustion engine under different loads are researched.The simulation result is consistent with the experimental data.The simulation results show that the increasing concentration of hydrogen is beneficial to improving the efficiency of hydrogen fuel internal combustion engine.The large amount of NO generates in the rapid combustion period,the total amount of NO decreases constantly after the rapid combustion period,and the total amount of NO tends to be stable when the average temperature is below 2200 K.NO is generated mainly through three paths including thermo NO,NNH and N2 O,and the thermo NO path contributes a large proportion of total NO emissions, whose contribution ratio increases with the increase of fuel-air equivalence ratio.NNH and N2 O contribute about 25% of total NO emissions at lower concentrations,while when fuel-air equivalence ratio is 1.0,the sum of the contributions of these two paths to NO generation is negative.The contribution ratios for NO generation of three paths under different loads are obtained using chemical reac-tion kinetics method,which can reveal the NOx generation mechanism of hydrogen fuel internal combustion engine and establish the theoretical foundation for subsequent study.关键词
内燃机工程/氢燃料内燃机/详细机理/NOx排放/反应路径/贡献率Key words
internal combustion engine engineering/hydrogen fueled internal combustion engine/detailed mechanism/NOx emission/reaction path/contribution ratio分类
能源科技引用本文复制引用
朱海荣,耿泽伟,刘庆刚,彭培英..氢燃料内燃机NOx排放特性及机理[J].河北科技大学学报,2017,38(6):530-535,6.基金项目
国家自然科学基金(51706058) （51706058）
河北省高等学校科学技术研究项目(QN2016056) （QN2016056）
河北科技大学五大平台开放基金(PT2015022) （PT2015022）
