柴油机燃烧系统多参数多目标优化研究
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摘要
针对直喷柴油机燃烧系统多参数间存在的非线性现象,采用响应面法对其进行多参数多目标优化研究。该研究以双ω燃烧室结构、喷油夹角、供油始点、涡流比为因子,以燃烧指示功率、NO比排放和碳烟比排放为评价指标。首先利用正交设计,利用方差和极差分析筛选了燃烧室结构和喷油夹角优化方案;其次对供油始点和涡流比进行了多参数二次响应面全局寻优研究,得到2种满足功率和排放的优化方案并与原机方案进行性能对比分析。结果表明,喷油夹角为130°的1号燃烧室具有较高燃烧指示功率与排放性能。涡流比在1.6附近时燃烧指示功率取得最大值,且小涡流比对NO排放改善显著。
Aiming at the non-linear phenomenon existing in multi-parameters of direct injection diesel engine combustion system,multi-parameter and multi-goal optimization was conducted in response surface method,whose influence factors were double-ω combustion chamber structure,fuel injection angle,injection start point,swirl rate,and evaluation indexes were burning indicated power,NO and carbon specific emissions. Firstly,optimal proposal concerning combustion chamber structure and injection angle was implemented by variance and range analysis using orthogonal design. Secondly,global optimization of multi-parameter quadratic response surface for injection start point and swirl rate was investigated,two different optimization schemes were acquired and compared to the performance of original scheme. The results show that No.1 combustion chamber structure with 130° fuel injection angle had higher combustion indicated power and better emission performance. When the swirl rate was close to 1.6,combustion indicated power reached the maximum value and lower swirl rate had significant improvement on NO emission.
Aiming at the non-linear phenomenon existing in multi-parameters of direct injection diesel engine combustion system,multi-parameter and multi-goal optimization was conducted in response surface method,whose influence factors were double-ω combustion chamber structure,fuel injection angle,injection start point,swirl rate,and evaluation indexes were burning indicated power,NO and carbon specific emissions. Firstly,optimal proposal concerning combustion chamber structure and injection angle was implemented by variance and range analysis using orthogonal design. Secondly,global optimization of multi-parameter quadratic response surface for injection start point and swirl rate was investigated,two different optimization schemes were acquired and compared to the performance of original scheme. The results show that No.1 combustion chamber structure with 130° fuel injection angle had higher combustion indicated power and better emission performance. When the swirl rate was close to 1.6,combustion indicated power reached the maximum value and lower swirl rate had significant improvement on NO emission.
引文
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[8]李云清,王金成,李天蕾.喷雾锥角对柴油机燃烧过程影响的数值模拟[J].柴油机设计与制造,2006(2):32-35.(Li Yun-qing,Wang Jin-cheng,Li Tian-lei.Numerical simulation of the effect of spray angle on the combustion process of diesel engine[J].Design&Manufacture of Diesel Engine,2006(2):32-35.)
[9]Jones,Donald R.A taxonomy of global optimization methods based on response surfaces.Journal of global optimization 21.4(2001):345-383.
[10]郭勤涛,张令弥,费庆国.用于确定性计算仿真的响应面法及其试验设计研究.航空学报,2006,27(1):55-61.(Guo Qin-tao,Zhang Ling-mi,Fei Qing-guo.Response surface method and its experimental design for deterministic computer simulation.Journal of Aeronautics,2006,27(1):55-61.)
[2]Win,Z.,Gakkhar,R.P.,Jain,S.C.,&Bhattacharya,M.(2005).Parameter optimization of a diesel engine to reduce noise,fuel consumption,and exhaust emissions using response surface methodology.Proceedings of the Institution of Mechanical Engineers,Part D:Journal of Automobile Engineering,219(10):1181-1192.
[3]AlpAtmanli,A.,Yüksel,B.,uleri,E.,&Karaoglan,A.D.(2015).Response surface methodology based optimization of diesel-n-butanol-cotton oil ternary blend ratios to improve engine performance and exhaust emission characteristics.Energy Conversion and Management,90:383-394.
[4]袁野,李国岫,虞育松.基于响应面法的高强化柴油机燃烧系统多参数多目标优化匹配研究[J].内燃机工程,2012(5):24-30.(Yuan Ye,Li Guo-xiu,Yu Yu-song.Multi-parameter and multi-object optimization on combustion system of high power diesel engine based on response surface method[J].Chinese Internal Combustion Engine Engineering,2012(5):24-30.)
[5]魏胜利,卢泓坤,冷先银.ZS1100M柴油机双ω型燃烧系统的试验研究[J].兵工学报,2016(1):17-22.(Wei Sheng-li,Lu Hong-kun,Leng Xian-yin.Experimental research on combustion system with doubleωcombustion chamber for ZS1100M diesel engine[J].Acta Armamentarii,2016(1):17-22.)
[6]赵昌普,朱云尧,杨俊伟.燃烧室形状对增压中冷柴油机燃烧和排放影响的数值模拟[J].内燃机学报,2013(4):318-323.(Zhao Chang-Pu,Zhu Yun-yao,Yang Jun wei.Effects of combustion chamber geometry on the combustion and emissions of turbocharged inter--cooling diesel engine[J].Transactions of CSICE,2013(4):318-323.)
[7]Douglas C.Montgomery.实验设计与分析[M].人民邮电版社,2009:139-154.(Douglas C.Montgomery.Experiment Design and Analysis[M].Post&Telecom Press,2009:139-154.)
[8]李云清,王金成,李天蕾.喷雾锥角对柴油机燃烧过程影响的数值模拟[J].柴油机设计与制造,2006(2):32-35.(Li Yun-qing,Wang Jin-cheng,Li Tian-lei.Numerical simulation of the effect of spray angle on the combustion process of diesel engine[J].Design&Manufacture of Diesel Engine,2006(2):32-35.)
[9]Jones,Donald R.A taxonomy of global optimization methods based on response surfaces.Journal of global optimization 21.4(2001):345-383.
[10]郭勤涛,张令弥,费庆国.用于确定性计算仿真的响应面法及其试验设计研究.航空学报,2006,27(1):55-61.(Guo Qin-tao,Zhang Ling-mi,Fei Qing-guo.Response surface method and its experimental design for deterministic computer simulation.Journal of Aeronautics,2006,27(1):55-61.)
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