机电工程技术2025，Vol.54Issue(21)：29-34,6.DOI:10.3969/j.issn.1009-9492.2025.21.006
加速型结构预燃室对甲醇发动机燃烧特性的影响
Effect of Accelerated Structure Pre-combustion Chamber on Combustion Characteristics of Methanol Engine
摘要
Abstract
To investigate the influence of pre-chamber structure on jet flow and methanol combustion characteristics,a comparative study was conducted using the CONVERGE simulation platform,analyzing the effects of conventional,single-stage accelerated,and multi-stage accelerated pre-chamber structures on mixture distribution,combustion temperature field,and combustion characteristics in a methanol engine.The results indicate that the multi-stage accelerated pre-chamber,by incorporating a dual-throttle ring design,optimizes mixture distribution and significantly enhances airflow throttling.This causes the mixture to concentrate primarily above the pre-chamber throat,increasing flame jet velocity and advancing the pre-chamber jet ejection timing.Compared to the conventional pre-chamber,the multi-stage accelerated structure exhibits higher peak pressures in both the pre-chamber and main combustion chamber,as well as a higher peak heat release rate.Specifically,the peak pressure in the multi-stage accelerated pre-chamber is 96 kPa higher,while the corresponding main chamber peak pressure increases by 495 kPa.Additionally,the combustion duration of the multi-stage accelerated pre-chamber is 0.1℃A shorter than that of the single-stage accelerated structure and 1.61℃A shorter than that of the conventional pre-chamber.关键词
预燃室结构/射流特性/燃烧特性/多级加速型/仿真分析Key words
pre-chamber/jet characteristics/combustion efficiency/multi-stage acceleration type/simulation analysis分类
能源与动力引用本文复制引用
李云虹,吴威龙,李丹,解方喜,李勇,杜家坤,陈泓..加速型结构预燃室对甲醇发动机燃烧特性的影响[J].机电工程技术,2025,54(21):29-34,6.基金项目
广东省科技计划项目:广东省汽车清洁动力与能源应用技术重点实验室(2024年度)(2024B1212020006) （2024年度）
