二维码（扫一下试试看！） | | 对置活塞二冲程汽油机分层稀燃组织研究 | | Research on Stratified Mixture Lean Burn of Opposed-Piston Two-Stroke Gasoline Engine | | 投稿时间：2016-10-12 | | DOI：10.15918/j.tbit1001-0645.2018.01.003 | | 中文关键词:对置活塞二冲程汽油机二次喷射分层混合气稀薄燃烧 | | English Keywords:opposed-pistontwo stroke gasoline enginesecond injectionstratified mixturelean burn | | 基金项目:国家部委基础研究项目（B2220110005） | | | 摘要点击次数:873 | | 全文下载次数:694 | | 中文摘要: | | 结合对置活塞二冲程汽油机缸径小、冲程长的特点，提出了进排气侧非对称喷雾方式，并采用AVL-Fire软件对喷雾方向进行优化，实现全负荷工况下的缸内均匀混合；同时研究了部分负荷工况下二次喷射对分层混合气形成和稀燃组织的影响.结果表明，进气侧喷射角增大有利于提高缸内混合气的均匀度，排气侧喷射角增大会导致燃油蒸发率降低；二次喷油比例影响分层混合气浓稀区的分布，二次喷油时刻影响缸内混合气稀区的均匀性.当进气侧喷射角为30°、排气侧喷射角为15°时，选择第一次喷油时刻为220℃ A，第二次喷油时刻为270℃ A且二次喷油比例为20%，可有效组织混合气分层.在部分负荷工况下，采用分层稀混合气相比均匀稀混合气的火焰发展期缩短约30%，快速燃烧期缩短约15%. | | English Summary: | | For the characteristics of small bore and long stroke for opposed-piston two-stroke gasoline engine, an asymmetric spray mode on exhaust and intake side was proposed in this paper and the spray direction was optimized with CFD AVL-Fire software to form the homogenous mixture in full load. The effect of two-stage injection strategy with different injection timing and injection ratio on mixture stratification and lean burn organization were simulated based on optimized spray direction. The results show that the increase of injection angle in intake side can improve uniformity index of mixture and the increase of injection angle in exhaust side can reduce fuel evaporation. The second injection ratio affects stratified mixture distribution and the second injection timing affects stratified mixture uniformity. When the injection angle in intake side is 30° and the injection angle in exhaust side is 15°, first injection timing at 220℃A and the second injection timing at 270℃A with 20% total fuel quantity finally lead to ideal in-cylinder mixture stratified distribution. In part load, stratified mixture distribution can shorten 30% time of flame developing period and shorten 15% time of rapid burning period compared with homogeneous mixture. | | 查看全文查看/发表评论下载PDF阅读器 | |
赵凯,董明明,赵丰,秦也辰,刘锋,顾亮.基于车辆悬架振动响应的地面分类研究[J].北京理工大学学报（自然科学版）,2018,38(2):155~159.ZHAOKai,DONGMing-ming,ZHAOFeng,QINYe-chen,LIUFeng,GULiang.StudyonTerrainCl ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21王震坡,薛雪,王亚超.基于自适应无迹卡尔曼滤波的分布式驱动电动汽车车辆状态参数估计[J].北京理工大学学报（自然科学版）,2018,38(7):698~702.WANGZhen-po,XUEXue,WANGYa-chao.StateParameterEstimationofDistributedDr ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21.北京理工大学学报2018年总目次（第38卷）[J].北京理工大学学报（自然科学版）,2018,38(12):1321~1338..[J].TransactionsofBeijingInstituteofTechnology,2018,38(12):1321-1338.二维码（扫一下试试看！）北京理 ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21刘静,侯宇,苏婷慧,张庆,邵毅敏.基于模块化设计的特种车辆减振降噪技术研究[J].北京理工大学学报（自然科学版）,2018,38(S1):38~43.LIUJing,HOUYu,SUTing-hui,ZHANGQing,SHAOYi-min.StudyonVibrationControlandNoi ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21黄文彬,丁晓喜,杜明刚,邵毅敏.机械传动系统的智能感知技术[J].北京理工大学学报（自然科学版）,2018,38(S1):33~37.HUANGWen-bin,DINGXiao-xi,DUMing-gang,SHAOYi-min.IntelligentSensingTechnologyforMech ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21刘勇.轮毂电机驱动多轴越野车辆总体技术探讨[J].北京理工大学学报（自然科学版）,2018,38(S1):55~58.LIUYong.TheStudyonGeneralTechnologyofIn-WheelMotorDriveMultiaxisOff-RoadVehicle[J].Transact ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21郭志强,门日秀,闫柯,孙钰杰.特种车辆涡轮增压器内部流动特性分析[J].北京理工大学学报（自然科学版）,2018,38(S1):59~62.GUOZhi-qiang,MENRi-xiu,YANKe,SUNYu-jie.AnalysisonInternalFlowCharacteristicsofSp ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21谢霞,张学玲,段秀兵,徐柳.轮履变体式车辆底盘越障性能研究[J].北京理工大学学报（自然科学版）,2018,38(S1):107~111.XIEXia,ZHANGXue-ling,DUANXiu-bing,XULiu.ResearchonObstacle-SurmountingPerformance ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21江燕华,马忠民,徐达,李中好,骆振兴.某越野车辆平顺性仿真分析及综合评价[J].北京理工大学学报（自然科学版）,2018,38(S1):103~106.JIANGYan-hua,MAZhong-min,XUDa,LIZhong-hao,LUOZhen-Xing.RideComfortSimulati ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21刘辉,张聪,韩立金,曹福辉,王伟达,侯旭朝.带耦合机构的串联式履带车辆直驶稳定性控制[J].北京理工大学学报（自然科学版）,2018,38(S1):112~116.LIUHui,ZHANGCong,HANLi-jin,CAOFu-hui,WANGWei-da,HOUXu-chao.StraightD ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21
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