[1]邸立明,赵鹏,孔凡树,等.驻涡渠化活塞形貌对提升汽油机压缩比的数值模拟[J].燕山大学学报,2018,42(2):110-118.[doi:10.3969/j.issn.1007-791X.2018.02.003]
 DI Liming,ZHAO Peng,KONG Fanshu,et al.Numerical simulation of standing vortex channelization piston shape for improving gasoline engine compression ratio[J].Journal of YanShan University,2018,42(2):110-118.[doi:10.3969/j.issn.1007-791X.2018.02.003]
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驻涡渠化活塞形貌对提升汽油机压缩比的数值模拟
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《燕山大学学报》[ISSN:1007-791X/CN:13-1219/N]

卷:
42
期数:
2018年第2期
页码:
110-118
栏目:
机械工程
出版日期:
2018-03-31

文章信息/Info

Title:
Numerical simulation of standing vortex channelization piston shape for improving gasoline engine compression ratio
文章编号:
1007-791X(2018)02-0110-09
作者:
邸立明*赵鹏孔凡树齐田斌
燕山大学 车辆与能源学院,河北 秦皇岛 066004
Author(s):
DI LimingZHAO PengKONG FanshuQI Tianbin
School of Vehicle and Energy,Yanshan University,Qinhuangdao,Hebei 066004 China
关键词:
活塞形貌高压缩比燃烧控制数值模拟
Keywords:
piston shapehigh compression ratiocombustion controlnumerical simulation
分类号:
TK411
DOI:
10.3969/j.issn.1007-791X.2018.02.003
文献标志码:
A
摘要:
通过构建压缩比为9的汽油机活塞顶部形貌,获得压缩比分别为10、11和12的驻涡型与驻涡渠化型两类六种燃烧室,结合试验与数值模拟方法对各燃烧室的点火燃烧特性开展研究。结果表明,压缩比为10的驻涡渠化型比驻涡型缸压峰值低7%,压缩比为11的驻涡渠化型缸压峰值也比驻涡型有所降低,但驻涡渠化型在压缩后期因能形成明显滚流而具有较高的湍流强度。压缩比为12的驻涡渠化型因活塞顶部凸脊分割燃烧室空间作用显著,有效影响了点火燃烧进程的时间和空间维度,压力升高率峰值也为六种燃烧室中最高。随着压缩比提升,驻涡型和驻涡渠化型燃烧室的缸内峰值压力、峰值温度与平均指示压力等均升高,排放性也逐渐趋好,但压缩比为12的驻涡型比驻涡渠化型峰值压力高21.5%。因此,合理设计活塞顶部形貌可有效组织缸内流场并提升点火燃烧品质,是汽油机低成本提升压缩比的有效手段。
Abstract:
Six combustion chambers belong to two types of standing vortex combustion chambers and standing vortexchannelization combustion chambers were got by building a compression ratio of 9 gasoline engine piston top shape,the compression ratio of standing vortex type and standing vortex-channelization type are 10,11,12 respectively.The ignition and combustion characteristics of each combustion chamber were studied by means of experiment and numerical simulation.Results show that,the cylinder peak pressure of standing vortex-channelization type is 7% lower than standing vortex type when compression ratio is 10,and the cylinder peak pressure of standing vortex-channelization type is also lower than standing vortex type when compression ratio is 11,but the turbulence intensity of standing vortex-channelization type is higher due to the formation of obvious tumble in the later stages of compression stroke.The separating combustion chamber space effect by piston top convex ridge of standing vortex-channelization type with compression ratio of 12 is remarkable,which can effectively influence the time and space dimension of ignition and combustion process,and the pressure rise rate peak value is also the highest in six combustion chambers.With the increase of compression ratio,the cylinder peak pressure,peak temperature and mean indicated pressure of standing vortex type and standing vortex-channelization type combustion chambers are increased,and the emissions are gradually better,but the cylinder peak pressure of standing vortex-channelization type is 21.5% higher than standing vortex type in the same of compression ratio.Therefore,reasonable design of the piston top shape can effectively organize the cylinder flow field and improve the ignition and combustion quality,it is an effective means to improve the compression ratio of gasoline engine with low cost.

备注/Memo

备注/Memo:
收稿日期:2017-05-31        责任编辑:温茂森
基金项目:国家自然科学基金资助项目(51406174);河北省自然科学基金资助项目(E2014203066)
作者简介:*邸立明(1981-),男,河北保定人,博士,副教授,主要研究方向为内燃机高压缩比技术,Email:diliming@ysu.edu.cn
更新日期/Last Update: 2018-07-13