| 二冲程发动机扫排气道—缸内系统三维瞬态数值模拟研究 |
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| 引用本文： | 蒋炎坤,钟毅芳,罗马吉,藏成,陈国华.二冲程发动机扫排气道—缸内系统三维瞬态数值模拟研究[J].内燃机学报,2001,19(2):159-164. |
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| 作者姓名： | 蒋炎坤 钟毅芳 罗马吉 藏成 陈国华 |
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| 作者单位： | 1. 华中科技大学 机械学院CAD中心,
2. 华中科技大学 动力系, |
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| 基金项目： | 中国博士后科学基金资助项目（第28批） |
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| 摘 要： | 对倒拖工况下的K100二冲程摩托车汽油机扫排气道－缸内系统流场进行了三维瞬态数值模拟研究。通过计算发现，整个扫气阶段的缸内流场是 由三维回流组成的。扫排气道－缸内系统流场是扫气气流以射流形式从周向与缸内气体混合并同时以类似类似环抱的形式将废气向排气口推挤，前类似于“完全混合”，后类似于“完全置换”。计算结果表明，数值模拟方法是分析复杂区域流场的有效方法。
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| 关 键 词： | 二冲程发动机 三信瞬态数值模拟 排气道缸内系统 汽油机 |
| 文章编号： | 1000-0909（2001）02-0159-06 |
| 修稿时间： | 2000年1月25日 |
Three-Dimensional
Transient Numerical Simulation in the Scavenging System and the Cylinder for Two-Stroke
Engine |
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| JIANG Yan-kun ,ZHONG Yi-fang ,LUO Ma-ji ,ZANG Cheng ,CHEN Guo-hua.Three-Dimensional
Transient Numerical Simulation in the Scavenging System and the Cylinder for Two-Stroke
Engine[J].Transactions of Csice,2001,19(2):159-164. |
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| Authors: | JIANG Yan-kun ZHONG Yi-fang LUO Ma-ji ZANG Cheng CHEN Guo-hua |
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| Affiliation: | JIANG Yan-kun 1,ZHONG Yi-fang 1,LUO Ma-ji 2,ZANG Cheng 2,CHEN Guo-hua 2 |
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| Abstract: | Three-dimensional transient numerical simulation is studied inthe scavenging system and the cylinder of the Model K100 two-stroke motocycle engine under cold motored condition.The research results reveal that the in-cylinder flow structure established during the scavenge phase is comprised of a three-dimensional loop.The airflow similar to jet flow blends with in-cylinder gas from circumference.The airflow jostles exhaust gas out of cylinder in a way similar to encirclement.The former is similar to “perfect mixing”,the latter is similar to “perfect displacement”.Numerical simulation method is an available method to analyze complex flow field. |
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| Keywords: | Two-stroke engine Scavengine process Three-dimensional transient numerical simulation |
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