直喷式柴油机缸内组分的仿真与实验研究  

Simulation and Experimental Research on Species in Direct-injection Diesel Engine

作　　者：刘永峰[1] 秦建军[1] 裴普成[2] 

机构地区：[1]北京建筑工程学院机械电子工程系,北京100044 [2]清华大学国家汽车安全与节能重点实验室,北京100084

出　　处：《系统仿真学报》2006年第z2期114-115,119,共3页Journal of System Simulation

基　　金：北京建筑工程学院2005年专项科研基金(Nr.1005039);北京市优秀人才培养项目(20051D0501705)

摘　　要：为仿真直喷式柴油发动机缸内燃烧后组分,提出了新的小火焰计算模型。此模型是通过引入理想混和比分数空间坐标系,将通常坐标系下的组分方程转化到混和比分数空间坐标系下,得出新的组分扩散方程。建立三维实体造型,计算出直喷式柴油发动机湍流燃烧后生成的碳烟和氮氧化物,最后通过实验检验了该计算模型。为发动机研究人员提供了一种仿真柴油发动机污染物的方法。To simulate the combustion species for direct-injection diesel engine, the new flamelet model was proposed and used. The model is based on stoichiometric mixture fraction space, and a way of separating the numerical effort associated with the solution of the turbulent flow field from that of solving the chemistry was offered. The new species equations were carried out through coordinate’s transformation. The results from the species equation were developed and three-dimension entity model with the mixture fraction was got. Then the boundary conditions were put into the new flamelet model. Furthermore the pollutions emissions were calculated and compared with the experimental data. A new way to predict the pollutants for direct-injection diesel engine was given.

关 键 词：直喷式柴油发动机 混合比分数 数值仿真 实体边界 

分 类 号：TU42[建筑科学—岩土工程]