基于快压机的双燃料燃烧过程数值研究  

Numerical Study of Dual-fuel Combustion Process Based on Rapid Compression Expansion Machine

作　　者：熊仟 邓楠楠 王璐江 宛张义 XIONG Qian;DENG Nannan;WANG Lujiang;WAN Zhangyi(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《工程热物理学报》2024年第7期2198-2205,共8页Journal of Engineering Thermophysics

基　　金：工业和信息化部高技术船舶科研项目(No.CBG5N21-1-1)。

摘　　要：利用CONVERGE软件构建并验证了基于快速压缩膨胀机的仿真模型,探究了柴油喷雾微引燃高压天然气射流的基础燃烧特征,分析了引燃油量和天然气喷孔直径对双燃料燃烧过程的影响。结果表明,燃烧火焰沿射流两侧扩散发展,燃气动量的减小对射流前端当量比分布影响较大;引燃油量影响了缸内引燃火焰持续时间,从而影响了燃气着火时刻和燃烧量;天然气喷孔直径影响了射流喷射量和动量,涡流条件下,燃烧着火区域的分布影响燃气的着火和稳定燃烧。The simulation model based on Rapid Compression Expansion Machine was constructed by CONVERGE software and validated. The basic characteristics of pilot diesel spray/high-pressure natural gas jet combustion were studied, and the influences of pilot diesel mass and natural gas nozzle diameter on the dual fuel combustion process were investigated. The results show that the combustion flame develops along both sides of the jet, and the reduction of gas momentum has great effect on the equivalent ratio distribution at the front end of the jet. The pilot diesel mass affects the duration of the pilot diesel flame in the cylinder, thus affecting the ignition timing of the gas and the amount of the burned natural gas. The diameter of the natural gas nozzle affects the amount and momentum of the jet, and under vortex conditions, the distribution of the combustion flame area affects the ignition and stable combustion of the gas.

关 键 词：快速压缩膨胀机 天然气 高压直喷 引燃油量 天然气喷孔直径 

分 类 号：TK16[动力工程及工程热物理—热能工程]