The Effect Of NO Initialization Species On CH₄HCCI Engine

With the aggravation of the world energy crisis and pullution of the atmosphericenvironment,the engine have consumed a lot of energy and exhausted a lot of harmfulgas,so human must take measure to solve these problems. From the perspective of the fueland combustion,the best ways to solve these problem are using the new combustion modesand looking for new alternative fuels.So,this paper choose a new comustion mode and anew alternative fuel,they are CH4and HCCI, respectively.What this paper have studied isthat how NO content in the initial components effect the process of the engine of CH4.Based on the software of Chemkin,the first step is that buliding the reactionmechanism of NO-CH4,and test the the reaction mechanism in the models of PFR andICE.The second step is analyzing how the NO content in the initial components effect theprocess of the engine of CH4and how the effect change with the changing of theconcentration of the NO. the results show that the combustion temperature and pressurehave increased after joining the NO content,at the same time,the ignition delay Angle havereduced also.And then,this paper have studied deeply with the modes of the productionrate and sensitivity analysis,the result is that NO react with ROO content,and produce theOH content,the OH content is what the burning of CH4needs.The last step is thatanalyzing how the NO content effect the exhaust of the engine of CH4,and how NOgenerates and consumes detailedly.At the same time, for the sake of precise control theignition timing of HCCI,analyzing how the compression ratio, inlet temperature and theequivalent ratio effect the ignition timing of HCCI,the result is that the ignition timing willbe ahead of time with the increasing of compression ratio and inlet temperature,but the theignition timing will be late with the increasing of the equivalent ratio,what the paper havestudied provides certain theoretical basis for the accurate control of HCCI.