基于互动小火焰模型的内燃机燃烧过程大涡模拟  

Large eddy simulation of combustion processes in ICE based on RIF model

作　　者：刘戈[1] 解茂昭[1] 贾明[1] 

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024

出　　处：《化工学报》2011年第9期2490-2498,共9页CIESC Journal

基　　金：国家自然科学基金项目(50806008);国家重点基础研究发展计划项目(2007CB210002)~~

摘　　要：引言 随着排放法规的日益严格和原油价格的不断上涨,柴油发动机正面临着同时降低排放和减少油耗的双重挑战。计算流体力学（CFD）模拟可以深入理解发动机缸内复杂的流动、喷雾和燃烧过程,是研发下一代清洁、高效柴油机的重要工具。The representative interactive flamelets（RIF）model was coupled with the large eddy simulation（LES）method to predict the turbulent combustion in a diesel engine.The new approach is specifically suitable for the simulation of the complicated combustion processes in internal combustion engines because the multi-scale and highly-transient turbulent motion can be well reproduced,and detailed chemical mechanism can be used.By combining the KIVALES-RIF code developed in previous work with a reduced n-heptane oxidation mechanism,the combustion processes and emission characteristics of a single-cylinder version of the Caterpillar 3400 series heavy-duty diesel engine was simulated under the baseline operating condition.The results indicated that the predicted ignition delay,in-cylinder pressure,heat release rate and pollutants emission levels were in good agreements with the experimental results.Comparison between the predictions of the Reynolds averaged Navier-Stokes（RANS）method and the LES method showed that the turbulence model played an extremely important role in the prediction of the combustion processes.

关 键 词：内燃机燃烧 大涡模拟 RIF模型 火焰结构 污染物排放 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]