异步点火相位对二冲程发动机爆震燃烧的影响

贝太学; 魏民祥; 刘锐; 盛敬

doi:10.13224/j.cnki.jasp.2017.02.009

异步点火相位对二冲程发动机爆震燃烧的影响

doi: 10.13224/j.cnki.jasp.2017.02.009

1.
南京航空航天大学能源与动力学院，南京 210016
2.
南京航空航天大学能源与动力学院，南京 210016；南昌工程学院机械与电气工程学院，南昌 330099

基金项目: 江苏省高校研究生科研创新计划项目（KYLX_0244）

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出版历程
- 收稿日期: 2015-06-21
- 刊出日期: 2017-02-28

Effects of asynchronous ignition phase on knock combustion of two stroke engine

摘要

摘要: 为了了解异步点火相位对二冲程航空活塞发动机燃用煤油时的爆震影响问题，使用Fire软件建立了发动机燃烧室的计算模型，并通过试验验证了该模型，研究了异步点火相位对发动机缸内燃烧以及火焰面密度分布、爆震强度的影响等.结果表明：在转速为5000r/min、全负荷工况、混合气当量比为11、点火能量为3564mJ条件下，当其中一个火花塞点火时刻固定在上止点前曲轴转角为29° ，另一个火花塞相对其分别提前曲轴转角为1°，3°，5°时点火，随着双火花塞异步点火相位差的增大，缸内平均压力、放热率及累积放热量均呈现减小的趋势，两个火花塞附近的湍动能增大，火焰传播速度加快，火焰发展期缩短，爆震强度表征物的浓度逐步减小，二冲程煤油发动机爆震发生的倾向减小.
- 航空活塞发动机 /
- 煤油 /
- 二冲程 /
- 异步点火相位 /
- 燃烧 /
- 爆震
Abstract: In order to understand the impact of asynchronous ignition phase on the knock of twostroke kerosene aeropiston engine, a calculation model of the combustion chamber was established by using fire software. And the validity of the model was verified by the test data. The simulation and test results show that: at 5000r/min, full load and equivalence ratio of the mixture under 11 conditions, ignition energy at 3564mJ conditions, when one of the spark plugs ignition time is fixed at before top dead center crank angle is 29°, another ignition time is set ahead of crank angle is 1°, 3° and 5° relatively; with the increase of the phase difference of the double spark ignition, the average pressure, heat release rate and the accumulated heat release rate have decreased. The turbulent kinetic energy of the two spark plugs increases, the flame propagation velocity rises, the flame development period is shortened, and the concentration of the knock intensity is reduced gradually.
- aeropiston engine /
- kerosene /
- twostroke /
- asynchronous ignition phase /
- combustion /
- knock

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参考文献(18)

[1]	Pickett B M,Burnette P F,Wells S P,et al.Fire safety tests comparing synthetic jet and diesel fuels with JP8［J］.Fire Safety Journal,2011,46(3):89-95.
[2]	张志强,贺俊,魏名山,等.某航空活塞发动机回火试验［J］.航空动力学报,2013,28(8):1696-1701. ZHANG Zhiqiang,HE Jun,WEI Mingshan,et al.Backfire tests of an aircraft piston engine［J］.Journal of Aerospace Power,2013,28(8):1696-1701.(in Chinese)
[3]	Fernandes G,Fuschetto J,Filipi Z,et al.Impact of military JP8 fuel on heavyduty diesel engine performance and emissions［J］.Journal of Automobile Engineering,2007,221(8):957-970.
[4]	王振宇,丁水汀,杜发荣.航空重油发动机燃油供给系统动力学模型分析［J］.航空动力学报,2012,27(4):846-853. WANG Zhenyu,DING Shuiting,DU Farong.Analysis of dynamic modeling of aviation heavy oil piston engine fuel delivery system［J］.Journal of Aerospace Power,2012,27(4):846-853.(in Chinese)
[5]	Balakrishnan J,Balasubramanian V.Chemical analysis of motor gasoline by superior kerosene and high speed diesel with reference to adulteration［J］.Journal of Applied Chemical Research,2011,17(1):75-82.
[6]	Wiegand A L.Conversion of a micro,glowignition,twostroke engine from nitromethanemethanol blend fuel to military jet propellant (JP-8)［D］.Houghton MI:Michigan Technological University,2012.
[7]	Yu G,Li J G,Chang X Y,et al.Investigation of kerosene combustion characteristics with pilot hydrogen in model supersonic combustors［J］.Journal of Propulsion and Power,2015,17(6):1263-1272.
[8]	ZHEN Xudong,WANG Yang,XU Shuaiqing,et al.The engine knock analysis:an overview［J］.Applied Energy,2012,92(2):628-636.
[9]	Wang Z,Wang Y,Reitz R D.Pressure oscillation and chemical kinetics coupling during knock processes in gasoline engine combustion［J］.Energy and Fuels,2012,26(12):7107-7119.
[10]	盛敬,魏民祥,刘国满,等.基于内禀模态高频积分能量法的煤油发动机爆震因子计算方法［J］.航空动力学报,2014,29(3):504-510. SHENG Jing,WEI Minxiang,LIU Guoman,et al.Calculating method of knock factors based on method of intrinsic mode function highfrequency integral energy for kerosene engine［J］.Journal of Aerospace Power,2014,29(3):504-510.(in Chinese)
[11]	陈明飞,黄永生,张力,等.发动机单双火花塞点火性能对比研究［J］.小型内燃机与摩托车,2011,40(3):23-26. CHEN Mingfei,HUANG Yongsheng,ZHANG Li.Studies about performance of single and dual spark plug ignition on an ICE［J］.Small Internal Combustion Engine and Motorcycle,2011,40(3):23-26.(in Chinese)
[12]	黄永生.双火花塞点火发动机燃烧测试与诊断［D］.重庆:重庆大学,2012. HUANG Yongsheng.Combustion test and diagnosis of dualspark ignition engine［D］.Chongqing:Chongqing University,2012.(in Chinese)
[13]	HUANG Qi,GUO Gong,REN Qingsong,et al.Research on improving performance of the motorcycle engine at low and medium speed［J］.Journal of Advanced Manufacturing Systems,2008,27(2):243-248.
[14]	李垂孝.双火花塞对低排放天然气发动机燃烧影响仿真研究［D］.吉林:吉林大学,2016. LI Chuixiao.Simulation research on the effect of combustion for low emission CNG engine with dualsparkignition［D］.Jilin:Jilin University,2012.(in Chinese)
[15]	ZHOU Dongqing,LI Jun,GAO Ying,et al.Research on LPG dualsparkignition engine combustion by CFD［J］.Advanced Materials Research,2012,443-444:1032-1038.
[16]	盛敬.二冲程煤油发动机爆震燃烧数值模拟与试验研究［D］.南京：南京航空航天大学,2014. SHENG Jing.Simulation and experimental study on knock Combustion in twostroke kerosene engine［D］.Nanjing:Nanjing University of Aeronautics and Astronautics,2014.(in Chinese)
[17]	李冰林.活塞式煤油发动机点火提前角仿真计算与试验研究［D］.南京：南京航空航天大学,2011. LI Binglin.Simulation and experimental study on spark advance of piston kerosene engine［D］.Nanjing:Nanjing University of Aeronautics and Astronautics,2011.(in Chinese)
[18]	陈林林.二冲程煤油发动机性能数值模拟与喷油控制研究［D］.南京：南京航空航天大学,2009. CHEN Linlin.Research on numerical simulation of performance and fuel injection control for twostroke kerosene engine［D］.Nanjing:Nanjing University of Aeronautics and Astronautics,2009.(in Chinese)