高低型双涡流室双缩口燃烧室的排放特性  

Emission Characteristics of a Combustion Chamber with a Higher and a Lower Throat Swirl Chamber

作　　者：李毅 徐华平[1] 苏石川[1] 李宇轩 殷杰 LI Yi;XU Huaping;SU Shichuan;LI Yuxuan;YIN Jie(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China)

机构地区：[1]江苏科技大学能源与动力工程学院,江苏镇江212003

出　　处：《船舶工程》2021年第5期72-78,共7页Ship Engineering

摘　　要：为优化某船用柴油机的燃烧室的"油-气-室"匹配,降低有害物排放,运用AVL Fire对原型燃烧室改用不同燃烧室进行额定工况模拟。结果表明,高低型双涡流室双缩口燃烧室能在上涡流室形成"飞轮效应",相对于原型燃烧室,不仅能增加功率,而且能降低NOX和SOOT的排放。对高低型双涡流室双缩口燃烧室设置不同的高低涡流室的半径比r/R和喷油夹角进行计算。结果表明:随着r/R从0.3增加到1.3,NOX和SOOT的排放量均先减少后增多;当r/R为0.7时,NOX和SOOT的排放量均最少。当喷油夹角为140°~165°时,随着喷油夹角的增大,NOX的排放量先减少后增加,随后再减少,最后又升高;SOOT排放量先减小后增大,随后再减小。To optimize the match of fuel-air-chamber in a Marine diesel engine combustion chamber, and reduce harmful emissions, using AVL Fire to simulate the combustion in different types of combustion chambers under rated operation conditions. The results show that the combustion chamber with a higher and a lower throat swirl chamber can form "flywheel effect" in higher swirl chamber, and thus produce increased power, while reducing the emissions of NOX and SOOT. The effect of different radius ratio(r/R) of higher and lower swirl chambers and different fuel injection angles are calculated. The results show that with r/R increasing from 0.3 to 1.3, the emissions of NOX and SOOT decreased first and then rose, and when r/R is 0.7, the emissions of NOX and SOOT are the lowest. In the wake of fuel injection angles rising from 140 to 165, the emissions of NOX first decreased, then increased, decreased again later on, and finally increased. The emissions of SOOT decreased first, then increased, and finally decreased again.

关 键 词：燃烧室 排放 涡流室 喷油夹角 半径比 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]