小型二冲程航空发动机燃烧循环变动研究

李冰林; 魏民祥

小型二冲程航空发动机燃烧循环变动研究

南京航空航天大学能源与动力学院, 南京 210016

基金项目: 预研项目

计量
- 文章访问数: 1643
- HTML浏览量: 46
- PDF量: 18
- 被引次数: 0
出版历程
- 收稿日期: 2009-12-29
- 修回日期: 2010-06-21
- 刊出日期: 2011-02-28

Study on cyclic variations of combustion in mini two-stroke aviation engine

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

摘要

摘要: 利用峰值压力、最大压力上升率、燃烧百分率以及它们各自所对应的曲轴转角和相空间重构投影法评价小型二冲程航空发动机的燃烧循环变动.通过比较,认为燃烧百分率所对应的曲轴转角能更好地表征发动机的燃烧循环变动.针对发动机在中速和不同负荷条件下的燃烧循环变动分析,结果表明随负荷的加大,缸内燃烧的循环变动会变小,认为是负荷加大,气体的不均匀度减小占主因,循环变动减小.最后分析了发动机在高速时的燃烧循环变动,得出小型二冲程发动机在该转速的不同工况下的燃烧变动率均小于10%,发动机工作在正常范围内.为以后改燃烧航空煤油后的燃烧性能分析提供一种可参考对比的方法.
- 二冲程航空发动机 /
- 循环变动 /
- 气缸压力 /
- 燃烧百分率 /
- 相空间
Abstract: The maximum pressure,maximum rate of pressure rise,mass fraction burn and its corresponding crank angle and reconstruction phase space were used to evaluate the cyclic variations of cylinder pressure under different working conditions of two-stroke aviation gasoline engine.On a comparative basis,the method of mass fraction burn and its corresponding crank angle can indicate the cyclic variations of engine more effectively.For the problem of cyclic variations of engine working in medium speed and different loads,the results show that cyclic variations will decrease with load increase,because the decrease of asymmetry of mixture gas is a main factor.After analyzing the cyclic variations at high speed working,the mini two-stroke aviation gasoline engine can work in normal condition because its coefficient of variation at different working conditions is less than 10%.The paper provided a contrastive method for performance analysis of combustion after the fuel was changed from gasoline to aviation kerosene.
- two-stroke aviation engine /
- cyclic variations /
- cylinder pressure /
- mass fraction burn /
- phase space

HTML

参考文献(12)

[1]	林海英,龙向阳.某型增压航空活塞发动机仿真研究[J].航空动力学报,2009,24(6):1332-1338. LIN Haiying,LONG Xiangyang.Simulation study of an aero-piston engine with single stage turbocharger[J].Journal of Aerospace Power,2009,24(6):1332-1338.(in Chinese)
[2]	蒋德明.内燃机燃烧与排放学[M].西安:西安交通大学出版社,2001:294-317. JIANG Deming.The combustion and emission of internal combustion engine[M].Xi’an:Xi’an Jiaotong University,2001:294-317.(in Chinese)
[3]	Ozdor N,Dulger M,Sher E.Cyclic variability in spark ignition engines:a literature survey .SAE Paper 940987,1994.
[4]	李兴虎,蒋德明,沈惠贤.火花点火发动机压力循环变动的评价方法研究[J].内燃机学报,2000,18(2):171-174. LI Xinghu,JIANG Deming,SHEN Huixian.Study on evaluated methods of pressure cyclic variation in spark ignition engines[J].Transactions of CSICE,2000,18(2):171-174.(in Chinese)
[5]	Peyton J C,Landsborough K J,Roberts J B.Identification of stochastic models for cyclic variations from measured pressure data .SAE Paper 970060,1997.
[6]	Roberts J B,Peyton J C,Landsborough K J.Stochastic modelling and estimation for cyclic pressure variations in spark ignition engines[J].Mechanical Systems and Signal Processing,2001,15(2):419-438.
[7]	Sen A K,Longwic R,Litak G,et al.Analysis of cycle-to-cycle pressure oscillations in a diesel engine[J].Mechanical Systems and Signal Processing,2008,22(2):362-373.
[8]	Zervas E.Correlations between cycle-to-cycle variations and combustion parameters of a spark ignition engine[J]. Applied Thermal Engineering,2004 ,24(14-15):2073-2081.
[9]	Sen A K,Litak G,Taccani R,et al.Wavelet analysis of cycle-to-cycle pressure variations in an internal combustion engine[J].Chaos,Solutions and Fractals,2008,38(3):886-893.
[10]	Litak G,Kaminski T,Czarnigowski J,et al.Combustion process in a spark ignition engine:analysis of cyclic maximum pressure and peak pressure angle oscillations[J].Meccanica,2009,44(1):1-11.
[11]	Belmont M R.Statistical aspects of cyclic variability .SAE Paper 860324,1986.
[12]	姚宝峰,李国岫.天然气发动机燃烧循环变动特征参数分析研究[J].内燃机工程,2007,28(4):1-5. YAO Baofeng,LI Guoxiu.Study on characteristic parameters of cycle-to-cycle combustion variations in natural gas engine[J].Chinese Internal Combustion Engine Engineering,2007,28(4):1-5.(in Chinese)