内燃机工程2025，Vol.46Issue(3)：1-7,7.DOI:10.13949/j.cnki.nrjgc.2025.03.001
电热塞助燃对天然气射流点火特性的影响
Influences of Glow Plug Assistance on the Ignition Characteristics of Natural Gas Jet
摘要
Abstract
In order to address the prolonged ignition delay of natural gas,a numerical simulation study on the ignition characteristics of natural gas assisted by glow plug(GP)was carried out.Results indicate that the GP effectively facilitates natural gas ignition,with the flame rapidly propagating from the circular opening and the bottom of the GP shield into the combustion chamber.Notably,the diamond multi-opening shield enhances flame propagation more effectively,and the ignition delay difference(IDD)is the smallest.The square multi-opening shield design prevents the natural gas jet from directly impinging on and cooling the GP surface,ensuring that the GP remains at an optimal temperature for ignition and reducing the ignition delay by temperature(IDT),compared to a single-opening shield.Additionally,elevated temperatures enhance natural gas ignition.When the GP temperature exceeds 1 400 K,the shield opening design becomes unnecessary.In these conditions,although a single-opening shield can achieve similar ignition performance with ignition time of about 0.3 ms,it may adversely affect the GP's lifespan.关键词
天然气/电热塞/点火特性/燃烧室Key words
natural gas/glow plug/ignition characteristic/combustion chamber分类
能源与动力引用本文复制引用
李常委,沈旭龙,潘康,陈龙飞..电热塞助燃对天然气射流点火特性的影响[J].内燃机工程,2025,46(3):1-7,7.基金项目
浙江省自然科学基金项目(LZ23E060005)Zhejiang Provincial Natural Science Foundation of China(LZ23E060005) （LZ23E060005）
