| 不同口径比和径深比燃烧室工作过程分析 |
| |
| 引用本文： | 郭晓平,王占杰.不同口径比和径深比燃烧室工作过程分析[J].山东内燃机,2006(3). |
| |
| 作者姓名： | 郭晓平 王占杰 |
| |
| 作者单位： | 大连理工大学 辽宁大连116023 |
| |
| 基金项目： | 本项目在AMD平台上完成并受到AMD大学计划支持 |
| |
| 摘 要： | 不改变燃烧室体积,通过改变燃烧室的口径比和径深比,对柴油机工作过程进行了模拟计算。燃烧模型取4步简化动力学模型,湍流模型取修正k-ε模型。计算区域除气缸和燃烧室外,还包括进、排气支管。计算结果表明,随着口径比的减小,缸内挤流强度增加。对于空间雾化燃烧的直喷式柴油机,将燃烧室结构设计成油注形状,可以利用燃烧波在燃烧室内产生较大尺度的垂直涡流,有利于增强燃油喷射效应,从而提高油气与空气的均匀混合质量,提高柴油机的经济性,同时也有利于降低NO排放。
|
| 关 键 词： | 柴油机 数值计算 流场 口径比 径深比 |
Analysis of Operating Process of Combustion Chamber at Different Calibre Ratio and Calibre-Depth Ratio |
| |
| Guo Xiaoping,Wang Zhanjie.Analysis of Operating Process of Combustion Chamber at Different Calibre Ratio and Calibre-Depth Ratio[J].Shandong Internal Combustion Engine,2006(3). |
| |
| Authors: | Guo Xiaoping Wang Zhanjie |
| |
| Abstract: | The working process of diesel engine is simulated by changing flow field,surface-volume ratio,diameter-depth ratio of combustion chamber with the same volume.A 4-step simplified dynamic model is for combustion model and modified k-(model for turbulent model.Besides cylinder and combustion chamber,intake and exhaust manifold is calculated.The calculation results shows that squashing inside cylinder gets much stronger when surface-volume ratio becomes smaller.For the direct injection diesel engine by atomizing combustion,the combustion chamber is shaped into oil column to create vertical swirl in combustion chamber by combustion wave so that to improve fuel injection effect and get homogeneous air/fuel mixture and high economy and low NO emission. |
| |
| Keywords: | Diesel Engine Numerical Calculation Flow Field Surface-volume Ratio Diameter-depth Ratio |
| 本文献已被 CNKI 等数据库收录！ |
|
