中国机械工程Issue(21)：2841-2846,6.DOI:10.3969/j.issn.1004-132X.2013.21.001
点燃式天然气发动机燃烧室结构优化的仿真与试验研究
Simulation and Experimental Study on Optimization of Combustion Chamber Structure in Natural Gas Engine
摘要
Abstract
In-cylinder flow and combustion characteristics of natural gas engine with bathtub combustion chamber were analyzed,two optimization schemes were proposed and performance of en-gine was studied when original combustion chamber and squish-inj ection combustion chamber were adopted.The results show that changing shape of piston head can achieve coupling between swirl and squish flow for constant compression ratio,control gas velocity near spark plug,increase mean turbu-lent kinetic energy,extend area of flame front and then improve combustion quality.Test was carried out at conditions of wide-open throttle and different speed to determine the effect of piston geometry on the performance and emissions.It shows that 2 # chamber can accelerate speed of combustion greatly and improve power performance and fuel economy of engine.Power increases from 75kW to 78.7kW,fuel consumption decreases by 4.4%,HC and CO emissions decrease slightly.关键词
天然气发动机/燃烧室/优化/仿真Key words
natural gas engine/combustion chamber/optimization/simulation分类
能源科技引用本文复制引用
杨立平,马修真,靖海国,李君..点燃式天然气发动机燃烧室结构优化的仿真与试验研究[J].中国机械工程,2013,(21):2841-2846,6.基金项目
国家自然科学基金资助项目(51306041) （51306041）
中央高校基本科研业务费专项资金资助项目(GK2030260115, GK2030260110) （GK2030260115, GK2030260110）
黑龙江省自然科学基金资助项目(QC2013C057) （QC2013C057）
