火花点火天然气发动机燃烧过程CFD研究  

Multi-dimensional simulation of combustion process in ignition nature gas engine

作　　者：焦运景[1] 张惠明[1] 杨志勇 张自立 司鹏昆[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]东风南充汽车有限公司,四川南充637000

出　　处：《热科学与技术》2008年第4期360-366,共7页Journal of Thermal Science and Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA11A1B2)

摘　　要：为了研究点燃式天然气发动机燃烧系统的燃烧过程和缸内气体运动规律,应用CFD软件对一台点燃式天然气发动机的燃烧过程进行了多维模拟计算。通过计算得到了发动机缸内气体的流场、温度场及火焰传播等计算信息,并分析研究了压缩及燃烧过程中缸内气体的流动规律及温度分布规律以及湍动能对火焰传播的影响,为燃烧室的设计及燃烧过程性能优化提供了理论性指导。In order to study the combustion process and gas flow in cylinder of a spark-ignition CNG engine, the CFD software FIRE developed by AVL is adopted to simulate combustion process of a spark-ignition engine. With numerical simulation, some important information in the cylinder which could not be acquired in the experiment was obtained, such as the velocity, temperature fields and flame propagation. Furthermore, the characteristic of flow field and the temperature distribution in the cylinder were investigated in detail; on the other hand, the effect of turbulent kinetic energy on the flame propagation was analyzed in detail. The investigation about the information from numerical simulation gives some theory guidance for combustion chamber design and optimizing combustion performance.

关 键 词：火花点火 天然气发动机 燃烧过程 多维模拟 

分 类 号：TK43[动力工程及工程热物理—动力机械及工程]