重庆大学学报Issue(9)：11-17,7.DOI:10.11835/j.issn.1000-582X.2014.09.002
燃烧室热边界对微型发动机瞬态燃烧特性影响数值分析
Influence numerical analysis of combustion chamber thermal boundary conditions on unsteady combustion characteristics in micro ICE
摘要
Abstract
To research the influence of combustion chamber thermal boundary conditions on micro combustion characteristics in micro ICE,the laminar flow finite rate model is adopted to simulate the micro combustion process.Firstly,the influence of grid scale,the time step length and the maximum iterations per time step on accuracy of simulation results are explored.The results show that simulation results agree well with experimental results.And then,the influences of heat transfer coefficient,wall thickness and material on combustion characteristics are discussed. The results indicate that heat transfer coefficient has obvious influence on combustion characteristics.The pressure rise rate decreases,the ignition delays and the highest pressure value drops 2 atmospheres as heat transfer coefficient increases from 0 to 55 W/(m2 ·K). The wall thickness and material have a little effect on combustion characteristics.This is because that the main heat transfer resistance in the heat flow path from cylinder to external environment lies between the outer wall and environment.关键词
微型内燃机/微燃烧/壁面热阻/数值分析Key words
micro internal combustion engine/micro combustion/wall resistance/numerical analysis分类
能源科技引用本文复制引用
唐刚志,张力,杜宝程,尚会超..燃烧室热边界对微型发动机瞬态燃烧特性影响数值分析[J].重庆大学学报,2014,(9):11-17,7.基金项目
国家自然科学基金资助项目（51175530）；博士点基金资助项目 （）
